Samsung Air Conditioner MH026FNCA User Guide
FREE JOINT MULTI AIR CONDITIONER  
INDOOR UNIT  
MH026FNCA  
MH035FNCA  
MH052FNCA  
MH026FECA  
MH035FECA  
MH052FECA  
OUTDOOR UNIT  
MH050FXCA2A  
MH080FXCA4A  
Manualꢀ  
SERVICEꢀ  
AIR CONDITIONER  
THE FEATURE OF PRODUCT  
■
■
Multi Inverter(Free Joint Multi) Series  
– Variable Indoor Unit Combination(Free Joint Multi)  
– Multi Inverter(Free Joint Multi) Series delivers  
comfort to 2~4 rooms with a Single Outdoor Unit  
– Smart & Low noise outdoor units in any condition.  
Energy Saving  
– High Efficiency DC inverter and BLDC Comp.  
– Smart Inverter Control algorithm.  
–
TBR Sine-Wave Compressor & Sine Wave Controller.  
■
■
Convenient Installation  
– 485 non Polarity / Auto addressing  
– Easy checking system condition by 7-segment  
Space Saving & Environmental Friendly  
– Compact & Light Outdoor Unit  
– Slim and Quiet Indoor Units  
Refer to the service manual in the GSPN(see the rear cover) for the more information.  
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Contents  
..............................................................................................................................  
................................................................................................................  
9. Troubleshooting  
9-1  
9-1  
9-1 Items to be checked first  
...............................................................................................  
9-2 Checking and Testing operations  
9-2  
.......................................................................................................  
9-3 Fault Diagnosis by Symptom  
9-12  
9-18  
...................................................................................................................................  
9-4 PCB Inspection  
.......................................................................................................  
10. Reference for Installation  
10-1  
10-1  
10-3  
10-5  
10-7  
10-8  
10-9  
....................................................................................................  
.................................................................................  
10-1 Selecting Area for Installation  
10-2 Connecting Up and Purging the Circuit  
..............................................................................................................................  
10-3 Refrigerant Refill  
.................................................................................................................  
................................................................................................................  
..............................................................................................................  
10-4 Refrigerant Adjustment  
10-5 Flare Nut Fixing Torque  
10-6 "Pump down" Procedure  
...............................................................................................................  
.................................................................................................................  
.....................................................................................................  
11. Reference Information  
11-1  
11-1  
11-3  
11-5  
11-5  
11-6  
11-9  
11-1 Index for Model Name  
11-2 Refrigerating Cycle Diagram  
11-3 Pressure & Capacity mark  
.........................................................................................................  
..............  
11-4 The abbreviated technology words & the definition of technology terms  
...................................................................................................................  
11-5 Q & A for Non-trouble  
...............................................................................................  
11-6 Common sense of refrigeration  
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1. Precautions  
1-1 Installing the air conditioner  
●
Users should not install the air conditioner by themselves.  
Ask the dealer or authorized company to install the air conditioner except the window-type air conditioner in U.S.A and Canada.  
If you don’t install the air conditioner properly, it may cause a fire, a water leakage or an electric shock.  
You must install the air conditioner according to the national wiring regulations and safety regulations.  
Install the indoor unit higher than 8.2ft(2.5m) from the floor to avoid the injury caused by the operation of the fan.  
(except the window-type air conditioner)  
●
●
●
●
●
The manufacturer is not responsible for any accidents or injury caused by an incorrect installation.  
When installing the built-in type air conditioner, keep all electric cables such as the power cable and the connection cord in pipes,  
ducts, or cable channels to protect them from the danger of impact or any other incidents.  
More than 2 indoor units should be installed when you use Free Joint Multi air conditioner.  
MH050FXCA2A  
●
●
- MH052FNCA and MH052FECA indoor unit cannot be connected to the MH050FXCA2A outdoor unit.  
1-2 Power supply and circuit breaker  
●
If the power cord of the air conditioner is damaged, it must be replaced by the manufacturer or a qualified person in order to  
avoid a hazard.  
●
The air conditioner must be plugged into an independent circuit if applicable or connect the power cable to the auxiliary circuit  
breaker.  
An all pole disconnection from the power supply must be incorporated in the fixed wiring with a contact opening of >0.12inch(mm).  
Do not extend an electric cord to the air conditioner.  
●
●
The air conditioner must be plugged in after you complete the installation.  
1-3 During operation  
●
●
●
Do not repair the air conditioner at your discretion.  
It is recommended to contact a service center directly.  
Never spill any kind of liquid on the air conditioner.  
If this happens, turn off the air conditioner and contact an authorized service center.  
Do not insert anything between the airflow blades to prevent damage of the inner fan and consequent injury.  
Keep children away from the air conditioner.  
●
●
●
Do not place any obstacles in front of the air conditioner.  
Do not spray any kind of liquid into the indoor unit. If this happens, turn off the air conditioner and contact a service center.  
Make sure that the air conditioner is well ventilated at all times:  
Do not place a cloth or other materials over it.  
●
●
Remove the batteries if you don’t use the remote control for a long time. (If applicable)  
Use the remote control within 23ft(7m) from the indoor unit. (If applicable)  
Samsung Electronics  
1-1  
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1-4 Disposing of the unit  
●
●
Before throwing out the air conditioner, remove the batteries from the remote control.  
When you dispose of the air conditioner, consult your dealer. If pipes are removed incorrectly, refrigerant may blow out and  
cause air pollution. When it contacts with your skin, it can cause skin injury.  
●
The package of the air conditioner should be recycled or disposed of properly for environmental reasons.  
1-5 Others  
●
●
●
●
Never store or load the air conditioner upside down or sideways to prevent the damage to the compressor.  
Young children or infirm persons should be always supervised when they use the air conditioner.  
Max current is measured according to IEC standard for safety.  
Current is measured according to ISO standard for energy efficiency.  
1-2  
Samsung Electronics  
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2. Product Specifications  
2-1 The Feature of Product  
■ Multi Inverter(Free Joint Multi) Series delivers comfort to 2~4 rooms with a Single Outdoor Unit.  
■ Inverter for High Efficiency Operation.  
Thanks to inverter control, efficiency of operation of the outdoor unit is enhanced depending on the number of indoor units  
operated and the temperature setting.  
When only one indoor unit is used, power is saved, resulting in a smaller electricity bill. When all indoor units are used,  
high-power operation achieves comfort quickly in all rooms.  
■ Installation of indoor units on different floors is possible.  
■ Convenient Installation  
Auto addressing option : Automated checking of pipe connection.(Refer to the installation manual for detail)  
■ Space saving & Environmental Friendly  
• Compact & light outdoor unit  
• Slim and quiet indoor units  
• Pipe size reduction  
• Ozone friendly Refrigerant(R410A)  
• Lead Free controller.  
■ Reliability  
• Installation possibilities(Length/Height)  
• Convenient installation(485 non polarity/auto-addressing)  
• Intelligent control/network  
• Easy checking system condition by 7-segment  
■ Smart & Low Noise outdoor units in any condition  
• TBR/Sine-Wave Controller/Noise Reduction Control/Dual Felt etc.  
• Felt Structure : New felt has selected to reduce the noise coming out of the compressor.  
Double layered felt structure absorbs noise by two times and felt is also covering top of the compressor to  
reduce the noise even more.  
Samsung Electronics  
2-1  
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2-2 Product Specifications  
Model  
MH026FNCA  
MH035FNCA  
Item  
INDOOR UNIT  
Type  
Wall-mounted  
9,000  
Wall-mounted  
12,000  
13,000  
-
Cooling  
Heating  
Dehumidifying  
Btu/hr  
10,000  
-
|/h  
Cooling  
Perfor-  
8.31  
9.54  
Air Volume  
m3/min  
mance  
Heating  
8.56  
9.93  
Cooling  
32  
36ꢀ  
Noise  
dB  
ø,V,Hz  
W
Heating  
32  
36ꢀ  
Power  
1,208~230,60  
30  
1,208~230,60  
35  
Cooling  
Power Consumption  
Heating  
30  
35  
Power  
Cooling  
0.18  
0.19  
Operating Current  
Heating  
A
0.18  
0.19  
mm  
inch  
825x285x189  
32x11x7.4  
7.8kgꢀ  
825x285x189  
32x11x7.4  
7.8kgꢀ  
WxHxD  
Outer Dimension  
Weight  
kg  
Liquid  
Gas  
OD(inch)xL(ft)  
OD(inch)xL(ft)  
DxL(mm)  
ø1/4  
ø1/4  
Refrigerant Pipe  
Drain Hose  
Size  
ø3/8x24.6  
ø18x535  
Cross-fan  
Resin/steel  
27ꢀ  
ø3/8x24.6  
ø18x535  
Cross-fan  
Resin/steel  
27ꢀ  
Type  
Motor  
Blower  
Type  
Rated Output  
W
Heat Exchanger  
2ROW 14STEP  
EEV  
2ROW 14STEP  
EEV  
Refrigerant Control Unit  
2-2  
Samsung Electronics  
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Product Specifications(cont.)  
Model  
MH052FNCA  
Item  
INDOOR UNIT  
Wall-mounted  
18,000  
Type  
Cooling  
Heating  
Dehumidifying  
Btu/hr  
19,000  
|/h  
-
Cooling  
Perfor-  
13.21  
Air Volume  
m3/min  
mance  
Heating  
14.22  
Cooling  
40  
Noise  
dB  
ø,V,Hz  
W
Heating  
40  
Power  
1,208~230,60  
50  
Cooling  
Power Consumption  
Heating  
50  
Power  
Cooling  
0.30  
Operating Current  
Heating  
A
0.30  
mm  
inch  
1,065x298x128  
42x12x8.6  
13  
WxHxD  
Outer Dimension  
Weight  
kg  
Liquid  
Gas  
OD(inch)xL(ft)  
OD(inch)xL(ft)  
DxL(mm)  
ø1/4x24.6  
ø1/2x24.6  
ø18x600  
Cross-fan  
Resin/steel  
40ꢀ  
Refrigerant Pipe  
Drain Hose  
Size  
Type  
Motor  
Blower  
Type  
Rated Output  
W
Heat Exchanger  
2ROW 16STEP  
EEV  
Refrigerant Control Unit  
Samsung Electronics  
2-3  
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Product Specifications(cont.)  
Model  
MH026FECA  
MH035FECA  
MH052FECA  
Item  
INDOOR UNIT  
Slim Duct  
12,000  
Type  
Slim Duct  
9,000  
Slim Duct  
18,000  
Cooling  
Heating  
Cooling  
Btu/hr  
10,000  
8.6  
13,000  
19,000  
9.8  
13.6  
Air Volume  
Perfor-  
mance  
m3/min  
Heating  
9.0  
10.3  
14.2  
Cooling  
31  
32  
39ꢀ  
Noise  
dB  
ø,V,Hz  
W
Heating  
31  
32  
39ꢀ  
Power  
1,208~230,60  
76  
1,208~230,60  
76  
1,208~230,60  
150  
Cooling  
Power Consumption  
Heating  
76  
76  
150  
Power  
Cooling  
0.35  
0.35  
0.69  
Operating Current  
Heating  
A
0.35  
0.35  
0.69  
mm  
inch  
900x199x600  
35.4x7.8X23.6  
26  
900x199x600  
38.2x7.1x15.4  
26  
1,100x199x600  
1,100x199x600  
31  
WxHxD  
Outer Dimension  
Weight  
kg  
Liquid  
Gas  
OD(inch)xL(ft)  
OD(inch)xL(ft)  
ø1/4x24.6  
ø3/8x24.6  
Sirocco fan  
Resin/steel  
47ꢀ  
ø1/4x24.6  
ø3/8x24.6  
Sirocco fan  
Resin/steel  
47ꢀ  
ø1/4x24.6  
ø1/2x24.6  
Sirocco fan  
Resin/steel  
53ꢀ  
Refrigerant Pipe  
Size  
Type  
Motor  
Blower  
Type  
Rated Output  
W
Heat Exchanger  
2ROW 12STEP  
EEV  
2ROW 12STEP  
EEV  
2ROW 12STEP  
EEV  
Refrigerant Control Unit  
2-4  
Samsung Electronics  
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Product Specifications(cont.)  
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2-5  
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2-3 Accessory and Option Specifications  
2-3-1 Indoor Unit Accessories  
■ MH✳✳✳FNCA  
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2-6  
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Product Specifications  
Indoor Unit Accessories(cont.)  
■ MH✳✳✳FECA  
Item  
Descriptions  
Code-No.  
Q'TY  
Remark  
S
ON  
CTI  
RU  
'S  
NER  
I
NST  
INST  
OW  
IO  
NES  
CC  
RU  
DE  
AL  
NU  
MA  
SO  
L'U  
I
PER  
ON  
UZI  
ISTR  
ÕES  
Ç
RU  
INST  
DE  
AL  
NU  
MA  
N
TIO  
ISA  
TIL  
D'U  
EL  
NU  
MA  
N
G
EISU  
NW  
HSA  
UC  
RA  
GEB  
oner  
onditi  
Air  
C
Room  
-type  
Splut  
ma  
S
plit  
co  
ad un  
siste  
mésti  
e
parat  
do do  
er am  
ciona  
ità Se  
plit  
Aire  
a
condi  
bienti  
onado  
d
e
'aria  
p
on  
S
tore  
iziona  
Cond  
tipo  
dici  
d
ar  
c
lho  
Apare  
Clima  
lte ra  
sépa  
ré  
e
de typ  
tiseur  
lag  
e
imaan  
umkl  
Getei  
User  
Manual  
DB98-29159A  
1
S
ION  
CT  
RU  
INST  
R'S  
NE  
OW  
ES  
ION  
C
UC  
INSTR  
L'U  
PER  
DE  
AL  
NU  
MA  
SO  
I
ION  
UZ  
ISTR  
ÕES  
UÇ  
TR  
INS  
DE  
AL  
NU  
MA  
N
TIO  
SA  
TILI  
D'U  
EL  
NU  
MA  
N
G
EISU  
NW  
SA  
CH  
AU  
BR  
GE  
ioner  
C
ondit  
Air  
Room  
-type  
Splut  
ma  
S
plit  
co  
mésti  
do do  
iciona  
siste  
parate  
Aire  
a
cond  
ad  
u
nità Se  
r
am  
bienti  
d
e
'aria pe  
tore  
iziona  
Cond  
tipo  
S
plit  
ndici  
onado  
d
ar  
c
o
lho  
ré  
Apare  
Clima  
lte ra  
sépa  
lag  
e
de typ  
tiseur  
e
imaan  
umkl  
Getei  
Installation Manual  
Pattern Sheet  
DB98-29160A  
1
1
1
1
1
8
DB97-03906A/B  
DB72-00143D  
Insulation-Install Outlet  
Insulation-Install Inlet  
Drain Hose Joint  
DB72-00143E  
DB94-00758A  
DB63-00237A  
Indoor  
Unit  
Rubber  
(Grommet Hanger)  
Insulation-Drain Out  
Insulation-Out  
DB62-03439H  
DB62-03439J  
DB62-03440H  
1
2
1
Insulation-Drain In  
✳ The design and shape can be changed according to the model.  
Samsung Electronics  
2-7  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Product Specifications  
Indoor Unit Accessories(cont.)  
■ MH✳✳✳FECA(cont.)  
Item  
Descriptions  
Code-No.  
Q'TY  
Remark  
Cable-tie  
DB65-10088C  
8
Indoor  
Unit  
Drain Pipe Holder  
DB90-02064A  
2
✳ The design and shape can be changed according to the model.  
2-8  
Samsung Electronics  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Product Specifications  
2-3-2 Outdoor Unit Accessories  
■ MH050FXCA2A/MH080FXCA4A  
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Samsung Electronics  
2-9  
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Product Specifications  
2-3-3 Transmitter Unit Accessories  
Item  
Descriptions  
Code-No.  
Q'TY  
Remark  
Transmitter  
(Ass'y PCB-DVM Plus I/M)  
DB9303568A  
(MIM-B13)  
1
Transmitter Power cable  
(Wire Harness-DC Source)  
DB39-00378E  
(MIM-B13)  
1
1
1
Transmitter communication cable  
(Connect Wire-COM)  
DB39-00253B  
(MIM-B13)  
Transmitter  
Case  
DB61-00450B  
(MIM-B13)  
(Case-Relay PCB Out)  
Cable-tie  
DB65-10088B  
3
1
NS  
TIO  
UC  
TR  
INS  
R'S  
NE  
OW  
ES  
ION  
CC  
RU  
INST  
DE  
AL  
NU  
MA  
'USO  
R
L
PE  
NI  
ZIO  
RU  
IST  
S
ÕE  
UÇ  
TR  
INS  
DE  
AL  
NU  
MA  
N
TIO  
ISA  
TIL  
D'U  
EL  
NU  
MA  
N
N
G
G
G
EISU  
NW  
HSA  
UC  
RA  
GEB  
EISU  
NW  
HSA  
UC  
RA  
GEB  
N
EISU  
NW  
ioner  
HSA  
UC  
RA  
Air  
GEB  
C
ondit  
Room  
type  
Splut-  
ma  
ità Se  
plit  
S
plit  
co  
mésti  
do do  
ciona  
siste  
parate  
condi  
ad un  
Aire  
a
r
am  
bienti  
tore  
iziona  
Cond  
d
e
'aria pe  
tipo  
S
c
o
ndici  
onado  
lho  
d
ar  
ré  
Apare  
Clima  
lte ra  
sépa  
lag  
e
e
de typ  
tiseur  
umkl  
imaan  
DB98-25776A  
(MIM-B13)  
e
imaan  
Getei  
lte ra  
lag  
umkl  
Getei  
Installation Manual  
✳ The design and shape can be changed according to the model.  
2-10  
Samsung Electronics  
Download from Www.Somanuals.com. All Manuals Search And Download.  
ꢀꢁꢂꢃHECJIAJPꢂ=J@ꢂꢃ@FQOPIAJPOꢀ  
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Samsung Electronics  
3-1  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Alignment and Adjustments  
■ MH✳✳✳FECA  
The error indicated on the LED display of Indoor unit  
Indicators  
Concealed Type  
Abnormal conditions  
Operating  
Blue  
Red  
Standard Type  
Power reset  
Displayed on  
appropriate indoor unit  
which is operating  
Error of temperature sensor in indoor unit(OPEN/SHORT)  
Displayed on  
appropriate indoor unit  
which is operating  
Error of heat exchanger sensor in indoor unit  
Error of heat exchanger OUT sensor in indoor unit  
Error of outlet temperature sensor in indoor unit  
(OPEN/SHORT): For heat pump models only  
Error of mixed operation  
Displayed on  
appropriate indoor unit  
which is operating  
Displayed on outdoor  
unit  
Error of outdoor temperature sensor  
Error of COND sensor  
Error of DISCHARGE sensor  
1. No communication for 2 minutes between indoor unit  
and outdoor unit (communication error for more than  
2 minutes)  
1. Error of indoor unit :  
Displayed on the  
indoor unit regardless  
of operation  
2. Indoor unit receiving the communication error from  
outdoor unit  
2. Error of outdoor unit :  
Displayed on the  
indoor unit which is  
operating  
3. Outdoor unit tracking 3 minutes error  
4. When sending the communication error from outdoor  
unit the mismatching of the communication numbers  
and installed numbers after completion of tracking.  
(communication error for more than 2 minutes)  
Self-diagnostic error  
(including the indoor unit not detected)  
Displayed on  
appropriate indoor unit  
which is operating  
Displayed on outdoor  
unit  
1. Error of electronic expansion valve close  
2. Error of electronic expansion valve open  
3. Breakaway of EVA OUT sensor  
4. Breakaway of EVA IN sensor  
: On  
: Flickering  
: Off  
◆ If you turn off the air conditioner when the LED is flickering, the LED is also turned off.  
◆ If you re-operate the air conditioner, it operates normally at first, then detect an error again.  
Samsung Electronics  
3-2ꢀ  
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Alignment and Adjustments  
■ MH✳✳✳FECA(cont.)  
The error indicated on the LED display of Indoor unit  
Indicators  
Concealed Type  
Abnormal conditions  
Operating  
Blue  
Red  
Standard Type  
Displayed on appropriate  
indoor unit which is  
operating  
Displayed on outdoor  
unit  
5. Breakaway of COND MID sensor  
6. 2nd detection of refrigerant completely leak  
7. 2nd detection of high temperature COND  
8. 2nd detection of high temperature DISCHARGE  
9. COMP DOWN due to 2nd detection of low pressure  
switch  
10. Error of reverse phase  
11. Compressor down due to 6th detection of freezing  
12. Self-diagnosis of condensation sensor (G8, G9)  
13. Compressor down due to condensation ratio control  
Error of float switch  
Error of setting option switches for optional accessories  
EEPROM error  
EEPROM option error  
: On  
: Flickering  
: Off  
◆ If you turn off the air conditioner when the LED is flickering, the LED is also turned off.  
◆ If you re-operate the air conditioner, it operates normally at first, then detect an error again.  
3-3ꢀ  
Samsung Electronics  
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Alignment and Adjustments  
3-1-2 Outdoor Unit  
Display  
REMARK  
EXPLANATION(The error indicated on the PCB display of outdoor unit)  
Check electrical connection  
and setting  
Communication error(indoor unable to receive data)  
Outdoor unit communication error  
(Abnormal data from indoor unit over 60 packet)  
Check electrical connection  
and setting  
Indoor unit room temperature sensor error (Open/Short)  
Indoor unit heat exchanger in temperature sensor error (Open/Short)  
Indoor unit heat exchanger out temperature sensor error (Open/Short)  
Indoor unit sensor error-Evaporator pipe in sensor - Self diagnosis  
Indoor unit sensor error-Evaporator pipe out sensor - Self diagnosis  
Indoor Unit FAN Error  
More than two indoor units cool and heat simultaneously  
Indoor Unit EEPROM Error  
Indoor Unit EEPROM Option Error  
Failure of pipe check operation  
Check electrical connection  
and setting  
No pipe check operation check  
- occasion : try to operation after the installation through auto addressing  
mode without pipe check operation.  
Check setting  
Check electrical connection  
and setting  
The number of Indoor unit mismatched  
Check electrical connection  
and setting  
Communication error between the outdoor and indoor unit  
Outdoor communication error between main PCB and sub PCB  
Outside temperature sensor error(Short/Open)  
- Error level: over 4.9V(-50˚C) under 0.4V(93˚C)  
Condenser temperature sensor error(Short/Open)  
- Error level: over 4.9V(-50˚C) under 0.4V(93˚C)  
Outdoor unit sensor error - Condenser out sensor(Short/Open) - Self diagnosis  
Compressor Discharge temperature sensor error  
Compressor discharge sensor detached - Self diagnosis  
Compressor OLP sensor error (Short/Open)  
- Error condition : outdoor temperature under -20˚C  
- Error level : over 4.95V(-30˚C) under 0.5V(151˚C)  
Samsung Electronics  
3-4ꢀ  
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Alignment and Adjustments  
Outdoor Unit(cont.)  
Display  
REMARK  
EXPLANATION(The error indicated on the PCB display of outdoor unit)  
check pipe length, indoor  
unit filter, refrigerant leakage/  
charge and service port  
Outdoor unit freezing(Compressor stop)  
check pipe length, refrigerant  
leakage/charge  
Outdoor unit overload - Safety control(Compressor stop)  
check pipe length, refrigerant  
leakage/charge  
Outdoor unit high discharge temperature - Safety control  
(Compressor stop)  
Outdoor unit EEV open (Stopped indoor unit s) -Self diagnosis  
Outdoor unit EEV open (operating indoor unit s) -Self diagnosis  
High temperature(over 30˚C) of outdoor as heating mode  
Low temperature(under -10˚C) of outdoor as cooling mode  
Outdoor Fan Error  
Check electrical connection  
Communication cable mismatched between indoor and outdoor unit  
Inverter compressor starting failure (5 times)  
Compressor trip by input current control mode (PFC over current)  
Compressor trip by OLP temperature control mode  
DC peak error (IPM Over Current)  
Compressor Limit Error  
DC link Voltage error (under 150V, over 410V)  
Abnormal compressor running  
(Compressor Rotation Error)  
Current sensor error  
DC link Voltage sensor error  
OTP Error  
Inverter micom zero-crossing error  
NO GAS error(self diagnosis)  
Piping(gas leak)  
3-5ꢀ  
Samsung Electronics  
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3-2 Setting Option Setup Method  
ex) Option No. :  
Step 1 : Enter the Option Setup mode.  
1st  
Take out the batteries of remote control.  
2nd  
Press the temperature  
insert the battery again.  
button simultaneously and  
3rd  
Make sure the remocon display shown as  
.
Step 2 : Enter the Option Setup mode and select your option according to the following procedure.  
Feature  
Display  
1
Setting Option SEG1.  
Push the  
button to set the display panel to  
.
Every time you push the button, the display panel reads  
. . .  
repeatedly.  
2
Setting Option SEG2.  
Push the  
Every time you push the button, the display panel reads  
. . .  
button to set the display panel to  
.
repeatedly.  
3
4
3
Change it into the set display of Option SEG3 and SEG4  
with the button.  
1,4  
2,5  
Setting Option SEG3.  
Push the button to set the display panel to  
Every time you push the button, the display panel reads  
.
. . .  
repeatedly.  
5
Setting Option SEG4.  
Push the  
Every time you push the button, the display panel reads  
. . .  
button to set the display panel to  
.
repeatedly.  
Samsung Electronics  
3-6ꢀ  
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Alignment and Adjustments  
Feature  
Display  
6
7
Change it into the set display of Option SEG5 and SEG6  
with the  
button.  
Setting Option SEG5.  
Push the button to set the display panel to  
Every time you push the button, the display panel reads  
.
. . .  
repeatedly.  
8
Setting Option SEG6.  
Push the  
Every time you push the button, the display panel reads  
. . .  
button to set the display panel to  
.
repeatedly.  
6,9  
9
Change it into the set display of Option SEG7 and SEG8  
with the button.  
7,10  
8,11  
10  
Setting Option SEG7.  
Push the button to set the display panel to  
Every time you push the button, the display panel reads  
.
. . .  
repeatedly.  
11  
Setting Option SEG8.  
Push the  
Every time you push the button, the display panel reads  
. . .  
button to set the display panel to  
.
repeatedly.  
12  
13  
Change it into the set display of Option SEG9 and SEG10  
with the button.  
12  
13  
14  
Setting Option SEG9.  
Push the button to set the display panel to  
Every time you push the button, the display panel reads  
.
. . .  
repeatedly.  
14  
Setting Option SEG10.  
Push the  
Every time you push the button, the display panel reads  
. . .  
button to set the display panel to  
.
repeatedly.  
3-7ꢀ  
Samsung Electronics  
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Alignment and Adjustments  
Step 3 : Upon completion of the selection, check you made right selections.  
Whenever you press the button, the set Option will be displayed.  
Step 4 : Pressing the ON/OFF button (  
)
When pressing the operation ON/OFF key with the direction of remote controller for unit, the sound "Ding" is heard and the  
OPERATION LED lamp is flickering at the same time, then the input of option is completed. (If the "ding" sound isn't heard,  
try again pressing the ON/OFF button.)  
Step 5 : Unit operation test-run  
First, Remove the battery from the remote controller.  
Second, Re-insert the battery into the remote controller.  
Third, Press ON/OFF (  
) key with the direction of remote controller for set.  
• Error Mode  
1st  
If all lamps of indoor unit are flickering, Plug out, plug in power plug again and press ON/OFF key to retry.  
2nd  
If the unit is not working properly or all lamps are continuously flickering after setting the option code, see if the  
correct option code is set up for its model.  
Samsung Electronics  
3-8ꢀ  
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TECHNICAL BULLETIN  
Technical Bulletins are produced to provide information not contained in the manuals or to update currently  
published technical information on the Samsung line of Mini splits  
This bulletin is on :  
Option Code Procedure for MH Neo Forte  
Know this  
The Option codes shown in the Service manual have been REVISED  
The correct option code sequence, and recommended procedure is shown below  
Option codes are required if ALL of the Indicator lights on the Indoor unit are blinking, the PCB has  
been replaced or the Indoor and Outdoor units are not communicating  
Symbol  
MH026FNCA  
ON TIMER OFF TIMER  
MH035FNCA  
ON TIMER OFF TIMER  
MH052FNCA  
ON TIMER OFF TIMER  
Auto  
Cool  
Dry  
2
4
2
2
7
0
4
2
0
0
1
0
0
0
0
0
2
4
2
2
7
0
6
2
0
0
1
0
0
0
0
0
2
4
2
2
6
0
9
2
0
0
1
0
0
0
0
0
Fan  
Heat  
1
A
0
0
4
D
0
0
8
F
0
0
Step 1 Make sure the Indoor unit is turned OFF. At the Outside unit turn off the power supply,  
wait for 1 minute for the Outdoor unit to completely power down, then re-apply power to the system  
Step 2 Remove the batteries from the remote, wait 10 secs then hold down BOTH the UP & DOWN temperature  
arrow buttons. While holding down the buttons re-insert batteries  
Step 3 An arrow should appear next to the Auto mode graphic, with 00 and the  
ON timer icon on the screen If no display appears repeat Step 2  
Step 5 Using the DOWN arrow key, press it the correct number of times to scroll  
the first digit in the code, display will change 0, through 9, A, B, C, D, E, F  
Once the first digit is programmed, then use the UP arrow key to program  
the second digit using the same method  
Step 6 Press the mode button, the arrow will move down to the next symbol, enter  
the digits required. Repeat until ALL the code above is entered  
Step 7 Press the MODE button again, the OFF timer icon will display, DO NOT  
enter the code again, press the MODE button 5 more times to return to the  
ON timer icon, then check the code entered against the above. Once  
checked use the MODE button to scroll through the OFF timer section  
Step 8 Point the remote at the Indoor unit, and press the POWER button 5 times  
to inject the code into the unit. Unit Ding's to show code has been accepted  
Remove batteries, wait 10 secs and re-insert batteries normally  
Step 9 Do not turn Indoor unit on using remote, instead go to the Outdoor unit  
Press the K2 Button THREE times to get the unit operating in the test mode  
Once the Indoor unit is making Condensate  
Press the K3 Button to take the unit out of the Test mode  
Restart unit using the remote, set to the required temperature and mode  
Tech Bulletin - Option Codes FJM MH FNCA Neo Forte  
#1  
Jun-08  
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Alignment and Adjustments  
■ Table of the option code  
MODEL  
OPTION CODE  
MH026FNCA  
027402-14221A-200001-300000  
MH035FNCA  
MH052FNCA  
027402-16224d-200001-300000  
026402-19228F-200001-300000  
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Samsung Electronics  
Download from Www.Somanuals.com. All Manuals Search And Download.  
4. Disassembly and Reassembly  
■ Necessary Tools  
Item  
Remark  
+SCREW DRIVER  
MONKEY SPANNER  
Samsung Electronics  
4-1  
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4-1 Indoor Unit  
Stop operation of the air conditioner and remove the power cord before repairing the unit.  
4-1-1 MH026FNCA/MH035FNCA/MH052FNCA  
No  
Parts  
Procedure  
Remark  
1) Stop the air conditioner operation and  
shut off the main power.  
1
Front Grille  
2) Open the Front Grille by pulling right and  
left sides of the hook.  
3) Loosen 1 of the right screw and detach  
the Terminal Cover.  
4) Detach the thermistor from the Front  
Grille.  
5) Loosen 3 fixing screws of Front Grille.  
4-2  
Samsung Electronics  
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Disassembly and Reassembly  
No  
Parts  
Procedure  
Remark  
6) Unlock 3 hooks to fix Panel Front and  
Tray Drain.  
7) Unlock 3 hooks to fix Panel Front and  
Back-Body.  
1) Take all the connector of PCB upper  
side out. (Inclusion Power Cord)  
Control-In  
(Main PCB)  
2
2) Detach the outdoor unit connection  
wirefrom the Terminal Block.  
3) Loosen 4 fixing screws of Ass’y Control-In.  
Tray Drain  
1) Pull Tray Drain out from the Back Body.  
3
Samsung Electronics  
4-3  
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Disassembly and Reassembly  
No  
Parts  
Procedure  
Remark  
1) Loosen 2 fixing earth screws of right side.  
2) Detach the Connection Pipe.  
4
Heat Exchanger  
3) Detach the Holder Pipe at the rear side.  
4) Loosen the 4 fixing screws of right and  
left side.  
5) Lifting the Heat Exchanger up a little to  
push the up side for separation from the  
indoor unit.  
1) Loosen the fixing screw.  
2) Detach the Fan Motor from the Fan.  
3) Detach the Fan From the left Holder  
Bearing.  
5
Fan Motor  
&
Cross Fan  
4-4  
Samsung Electronics  
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Disassembly and Reassembly  
4-1-2 MH026FECA/MH035FECA  
No  
Parts  
Procedure  
Remark  
1) Disassemble the Cabinet Top Motor.  
- Unscrew 8 screws  
1
Motor  
&
Blower  
2) Disassemble 2 Cover Blower Uppers.  
- After unscrewing 2 screws  
- Disassemble the Cover Blower Upper  
with pushing its hook.  
3) Disassemble the Cover Control.  
- Unscrew 2 screws  
Samsung Electronics  
4-5  
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Disassembly and Reassembly  
No  
Parts  
Procedure  
Remark  
4) Disassemble Motor Wires connected to  
the inside of PCB and connected to the  
Capacitor.  
5) Disassemble the Motor earth wire  
connected to the Partition.  
- Unscrew a screw  
6) Disassemble the band Motor for fixing  
the Motor.  
- Unscrew 2 screws  
7) After disassembling the Motor and Blower  
for the set, disassemble the Blower by  
use of 3mm wrench.  
4-6  
Samsung Electronics  
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Disassembly and Reassembly  
No  
Parts  
Procedure  
Remark  
1) Disassemble the Cabinet Top Evap.  
- Unscrew 11 screws  
2
Drain Pan  
2) Disassemble the Bracket Outlet Sub that  
fixes the Drain Pan equipped on the front  
of the set.  
- Unscrew 6 screws  
3) Disassemble the Drain Cushion from the  
set.  
Samsung Electronics  
4-7  
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Disassembly and Reassembly  
No  
Parts  
Procedure  
Remark  
✳
The Evaporator should be disassembled  
after disassembling the Cover Control  
1-3) and the Drain Pan 2-1), 2-2), 2-3).  
3
Evaporator  
1) Disassemble the Cover Pipe that fixes  
the high/low pressure Pipe.  
- Unscrew 2 screws  
2) Disassemble the refrigerant temperature  
sensor, Inlet air temperature sensor, and  
EEV wire that connected to the inside of  
PCB.  
3) Disassemble the Support Evap. LF that  
fixes the Evaporator.  
- Unscrew 2 screws  
4) Disassemble the Support Evap RH.  
- Unscrew 2 screws  
4-8  
Samsung Electronics  
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Disassembly and Reassembly  
No  
Parts  
Procedure  
Remark  
5) Disassemble the Evaporator form the set.  
4
Control In  
✳
The Control In should be disassembled  
after disassembling the Cover Control  
1-3).  
1) Disassemble all Control Wires connected  
to the inside of PCB.  
2) In case of disassembling the PCB  
separately, disassemble the PCB from  
the case with pushing the hook after  
unscrewing the screw.  
- Unscrew 1 screw  
3) In case of disassembling the Capacitor  
separately, disassemble the Capacitor  
from the Case.  
4) In case of disassembling the Case  
Control, disassemble the Case Control  
from the set after unscrewing the screw  
connected to the direction of Blower.  
- Disassemble if after disassembling the  
Cabinet Top Motor 1-1).  
Samsung Electronics  
4-9  
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Disassembly and Reassembly  
No  
Parts  
Procedure  
Remark  
5) In case of disassembling the Trans  
Power, unscrew the screw fixing on the  
Case.  
✳ Disassemble if after disassembling the  
case PCB 4-4).  
5
1) Disassemble the Bracket Outlet  
Bracket Outlet  
assembled on the Cabinet.  
- Unscrew 10 screws  
4-10  
Samsung Electronics  
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Disassembly and Reassembly  
4-1-3 MH052FECA  
No  
Parts  
Procedure  
Remark  
1) Pull out the Filter as picture 1 or picture 2.  
1
Filter  
2) If it is necessary, after disassembling  
8 indicating screws, detach the  
Bracket Filter.  
Samsung Electronics  
4-11  
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Disassembly and Reassembly  
No  
Parts  
Procedure  
Remark  
3) If the Cabinet-Top Motor is assembled on  
the side of the set, the procedure of  
disassembling the Filter is just as the  
above.  
1) After disassembling 13 indicating screws,  
detach Ass’y Cabinet-Top Motor.  
Blower  
&
2
Motor  
2) After disassembling 3 indicating screws,  
detach Ass’y Case Blower Upper.  
_
Press the pothook of the Case Blower  
and detach Ass’y Case Blower Upper.  
4-12  
Samsung Electronics  
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Disassembly and Reassembly  
No  
Parts  
Procedure  
Remark  
3) After disassembling 2 indicating screws,  
detach the Cover Control.  
4) Detach the Motor Wire Connected to  
PCB and Capacitor.  
5) After disassembling the indicating screws,  
detach the wire connected to the  
Partition.  
6) After disassembling 2 indicating screws,  
detach the Ass’y Band Motor.  
Samsung Electronics  
4-13  
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Disassembly and Reassembly  
No  
Parts  
Procedure  
Remark  
7) After disassembling the Motor and  
Blowers, detach the Blowers from the  
axis of the Motor by 3mm inner hexagon  
spanner.  
3
Drain Pan  
1) After disassembling 15 indicating screws,  
detach Ass’y Cabinet-Top Evap.  
2) After disassembling 6 indicating screws,  
detach the Bracket Outlet.  
3) Detach the Drain Pan.  
4-14  
Samsung Electronics  
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Disassembly and Reassembly  
No  
Parts  
Procedure  
Remark  
✳
After finished the procedures above,  
detach the Evaporator.  
4
Evaporator  
1) After disassembling 2 indicating screws,  
detach Ass'y Cover Pipe.  
2) Detach the Sensor from the  
Control Box.(including 2 Sensors)  
3) After disassembling 2 indicating screws,  
detach Ass'y Support Evap LF.  
4) After disassembling 2 indicating screws,  
detach Ass'y Support Evap RH.  
Samsung Electronics  
4-15  
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Disassembly and Reassembly  
No  
Parts  
Procedure  
Remark  
5) Detach the Evaporator from the set.  
5
Control In  
✳
Detach the parts of Control In after  
disassembling the Cover Control.  
1) Detach all the wires connected to the  
PCB.  
2) If only the disassembly of PCB required,  
press the Pothook and detach the PCB  
from the set.  
3) If only the disassembly of Capacitor is  
required, detach it from the set.  
4) If only the disassembly of Case Control is  
required, detach it from the set after  
disassembling 2 indicating screws.  
4-16  
Samsung Electronics  
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Disassembly and Reassembly  
No  
Parts  
Procedure  
Remark  
5) Detach the Transformer after  
disassembling 2 indicating screws.  
✳ Work is possible after disassembling  
the Case PCB.  
6
1) After disassembling 16 indicating screws,  
detach Ass'y Bracket Outlet.  
Ass'y Bracket  
Outlet  
Samsung Electronics  
4-17  
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4-2 Outdoor Unit  
4-2-1 MH050FXCA2A  
No  
Parts  
Procedure  
Remark  
1) Loosen the fixing screw and detach the  
Cover-Control. (Use +Screw Driver.)  
2) Detach the Cable-Connector Wire from  
the Terminal-Block.  
1
Common Work  
&
Control Out  
3) Loosen the fixing screw of the Ass'y  
Control Out. (Use +Screw Driver.)  
4) Loosen 8 fixing screws and detach the  
Cabinet Upper. (Use +Screw Driver.)  
5) Loosen 2 fixing screws, 5 bolts and  
detach the Front Cabinet.  
(Use +Screw Driver.)  
6) Loosen 2 fixing screws and pull up the  
Control Box. (Use +Screw Driver.)  
7) Loosen 9 fixing screws and detach the  
Cabinet Side. (Use +Screw Driver.)  
4-18  
Samsung Electronics  
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Disassembly and Reassembly  
No  
Parts  
Procedure  
Remark  
8) Detach the Terminal and detach the  
Compressor Lead Wire.  
1) Loosen the fixing nut and detach the Fan.  
(Use +Screw Driver.)  
2
Fan  
&
Motor  
2) Loosen 4 fixing bolts and detach the  
Motor. (Use +Screw Driver.)  
3) Loosen 4 fixing bolts and detach the  
Bracket Motor. (Use +Screw Driver.)  
Samsung Electronics  
4-19  
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Disassembly and Reassembly  
No  
Parts  
Procedure  
Remark  
1) Release the refrigerant at first.  
2) Disassemble the Inlet and Outlet Pipe by  
welding.  
3
Heat Exchanger  
&
Compressor  
3) Loosen the fixing screws of the  
Heat Exchanger. (Use +Screw Driver.)  
4) Detach the Heat Exchanger.  
5) Loosen 3 nuts of the Compressor.  
(Use Monkey Spanner.)  
6) Detach the Compressor.  
4-20  
Samsung Electronics  
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Disassembly and Reassembly  
4-2-2 MH080FXCA4A  
No  
Parts  
Procedure  
Remark  
1) Loosen 7 fixing screws and detach the  
Cabinet side RH. (Use +Screw Driver.)  
2) Detach the Cable-Connector Wire from  
the Terminal-Block.  
1
Common Work  
&
Control Out  
3) Loosen 2 fixing screws of the Ass'y  
Control Out. (Use +Screw Driver.)  
4) Loosen 6 fixing screws and detach the  
Cabinet Upper. (Use +Screw Driver.)  
5) Loosen 2 fixing screws, 7 bolts and  
detach the Cabinet Front.  
(Use +Screw Driver.)  
Samsung Electronics  
4-21  
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Disassembly and Reassembly  
No  
Parts  
Procedure  
Remark  
6) Loosen 2 fixing screw and pull up the  
Control Box. (Use +Screw Driver.)  
7) Pull the felt and detach it.  
8) Detach the Terminal Cover and detach  
the comp lead wire.  
4-22  
Samsung Electronics  
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Disassembly and Reassembly  
No  
Parts  
Procedure  
Remark  
1) Loosen the fixing nut and detach the Fan.  
(Use Monkey Spanner.)  
2
Fan  
&
Motor  
2) Loosen 4 fixing bolts and detach the  
Motor. (Use +Screw Driver.)  
3) Loosen 4 fixing bolts and detach the  
Bracket Motor. (Use +Screw Driver.)  
1) Release the refrigerant at first.  
2) Disassemble the Inlet and Outlet Pipe by  
welding.  
3
Heat Exchanger  
&
Compressor  
3) Loosen the fixing screw of the  
Heat Exchanger. (Use +Screw Driver.)  
4) Detach the Heat Exchanger.  
5) Loosen 3 nuts of the Compressor.  
(Use Monkey Spanner.)  
6) Detach the Compressor.  
Samsung Electronics  
4-23  
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Exploded Views and Parts List  
5-1-2 MH052FNCA  
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Download from Www.Somanuals.com. All Manuals Search And Download.  
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Exploded Views and Parts List  
5-1-3 MH026FECA/MH035FECA  
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Download from Www.Somanuals.com. All Manuals Search And Download.  
Exploded Views and Parts List  
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5-6  
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5-8  
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Samsung Electronics  
5-10  
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Exploded Views and Parts List  
5-2-2 MH080FXCA4A  
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5-11  
Samsung Electronics  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Exploded Views and Parts List  
■
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Samsung Electronics  
5-12  
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6. Wiring Diagram  
6-1 Indoor Unit  
■ MH✳✳✳FNCA  
This Document can not be used without Samsung's authorization.  
6-1  
Samsung Electronics  
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&J@KKNꢂ2JEPꢂĠ?KJPꢁꢋꢀ  
*%ꢀ #" Aꢀ  
This Document can not be used without Samsung's authorization.  
Samsung Electronics  
6-2  
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6-2 Outdoor Unit  
■ MH050FXCA2A  
This Document can not be used without Samsung's authorization.  
6-3  
Samsung Electronics  
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Wiring Diagram  
■ MH080FXCA4A  
This Document can not be used without Samsung's authorization.  
Samsung Electronics  
6-4  
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7. Schematic Diagram  
7-1 Indoor Unit  
■ MH✳✳✳FNCA  
This Document can not be used without Samsung's authorization.  
7-1  
Samsung Electronics  
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Schematic Diagram  
■ MH✳✳✳FECA  
This Document can not be used without Samsung's authorization.  
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7-2  
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8. PCB Diagram  
8-1 MAIN PCB(Indoor Unit)  
■ MH✳✳✳FNCA  
The red number connecter is not used.  
!ꢀ  
@ꢀ  
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&ꢀ  
*ꢀ  
(ꢀ  
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1ꢀ  
2ꢀ  
Temperature Sensor  
Motor RPM Feedback  
Remocon Module  
Humidity Sensor  
Anions  
Auto Grill  
HVPS(High voltage Generator)  
BLADE-H Step Motor  
Display  
MPI  
Indoor Fan Motor  
8-1  
Samsung Electronics  
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02ꢌꢂ- ꢌĠ&J@KKNꢂ2JEPꢋꢂĠ?KJPꢁꢋꢀ  
■ MH✳✳✳FNCA  
The red number connecter is not used.  
!ꢀ  
@ꢀ  
!ꢀ  
External Signal  
MAIN PCB Connection  
@ꢀ  
Samsung Electronics  
8-2  
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PCB Diagram  
■ MH✳✳✳FECA  
!ꢀ  
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3ꢀ  
7ꢀ  
8ꢀ  
9ꢀ  
0ꢀ  
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‘
+
=
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COM 2  
!ꢀ  
3ꢀ  
4ꢀ  
5ꢀ  
6ꢀ  
7ꢀ  
8ꢀ  
9ꢀ  
0ꢀ  
“ꢀ  
‘ꢀ  
+ꢀ  
=ꢀ  
Qꢀ  
Room Temperature  
EVA in Temperature  
EVA out Temperature  
Heater Temperature  
Load Control Signal  
Heater  
@ꢀ  
Address Switch  
Option Switch  
Fan (Tap Control)  
Ventilator  
#ꢀ  
$ꢀ  
%ꢀ  
^ꢀ  
&ꢀ  
*ꢀ  
(ꢀ  
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1ꢀ  
2ꢀ  
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Control Signal  
EEV  
Drain Pump  
Hot Coil  
Display  
Operating Check Signal  
HALL IC  
Fan (SSR)  
Trans In  
Download  
COM 1  
Main Power  
Trans out  
8-3  
Samsung Electronics  
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ꢍꢄꢈꢂ*ꢃ&+ꢀ- ꢌĠ,QP@KKNꢂ2JEPꢋꢀ  
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9. Troubleshooting  
9-1 Items to be checked first  
1. The input voltage should be rating voltage 10% range.  
The air conditioner may not operate properly if the voltage is out of this range.  
2. Is the link cable linking the indoor unit and the outdoor unit linked properly?  
The indoor unit and the outdoor unit shall be linked by 4 wires.  
2 wires are for power and other 2 wires are for communication, total 4 wires on each indoor unit. Check the terminals if the  
indoor unit and outdoor unit are properly linked by the same number of cables and if connecting position on the terminal is  
correct. Otherwise the air conditioner may not operate properly.  
3. When a problem occurs due to the contents illustrated in the table below it is a symptom not related to the malfunction of the  
air conditioner.  
No  
Operation of air conditioner  
Explanation  
In a COOL operation mode, the compressor does not  
operate at a room temperature higher than the setting  
temperature that the INDOOR FAN should operate.  
In a HEAT operation mode, the compressor does not  
operate at a room temperature lower than the setting  
temperature that indoor fan should operate.  
In happens after a delay of 3 minutes when the compressor  
is reoperated. The same phenomenon occurs when a power  
is on.  
1
As a phenomenon that the compressor is reoperated after a  
delay of 3 minutes, the indoor fan is adjusted automatically with  
reference to a temperature of the air blew  
2
Fan speed setting is not allowed in AUTO(  
DRY( ) mode.  
) or  
The speed of the indoor fan is set to LL in DRY mode.  
Fan speed is 5 steps and is selected automatically in AUTO  
mode.  
3
4
Compressor stops operation intermittently in  
DRY( ) mode.  
Compressor operation is controlled automatically in DRY mode  
depending on the room temperature and humidity.  
Compressor of the outdoor unit is operating although  
it is turned off in a HEAT mode.  
When the unit is turned off while de-ice is activated, the  
compressor continues operation for up to 12 minutes (maxi-  
mum) until the deice is completed.  
Timer LED(  
) only of the indoor unit lights up and  
Timer is being activated and the unit is in ready mode.  
5
6
the air conditioner does not operate.  
The unit operates normally if the timer operation is cancelled.  
The compressor and indoor fan stop intermittently in  
HEAT mode.  
The compressor and indoor fan stop intermittently if room  
temperature exceeds a setting temperature in order to protect  
the compressor from overheated air in a HEAT mode.  
7
8
Indoor fan and outdoor fan stop operation  
intermittently in a HEAT mode.  
The compressor operates in a reverse cycle to remove  
exterior ice in a HEAT mode, and indoor fan and outdoor fan  
do not operate intermittently for within 20% of the total heater  
operation.  
The compressor stops intermittently in a  
COOL mode or DRY mode, and fan speed of the  
indoor unit decreases.  
The compressor stops intermittently or the fan speed of the  
indoor unit decreases to prevent inside/outside air frozen  
depending on the inside/outside air temperature.  
9-1  
Samsung Electronics  
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9-2 Checking and Testing operations  
To complete the installation, perform the following checks and tests to ensure that the air conditioner is operating  
correctly.  
1. Review all the following elements in the installation:  
• Installation site strength  
• Piping connection tightness not to leak any gas  
• Connection wiring  
• Heat-resistant insulation of the piping  
• Drainage  
• Earthing wire connection  
• Setting number of the indoor unit installed (Outdoor unit SW)  
• Setting SW02 for addressing mode (AUTO or MANUAL)  
• Address number on each indoor unit (Manual addressing mode)  
• Correct operation for pipe checking connection (follow the step below)  
• If the auto addressing, refer to next page.  
• If the manual addressing, please do cool mode try-run or heat mode try-run.(refer to below)  
■ Settings of PCB Display of the Outdoor unit  
-K1 :pipe checking operation button -K2 :Function button  
-K3 :Reset button  
-K4 :View mode change button  
Key  
K1  
K2  
K3  
K4  
Push  
Heat Mode Try  
run  
Pipe Checking  
Operation  
1
SW02  
SW01  
(Display:  
)
(Display:  
)
K 1  
Refrigerantꢀ  
Chargingꢀ  
Switch  
DIS01  
DIS02  
2
3
4
-
(Display:  
)
View mode  
change  
Indoor unit  
address  
Reset  
Cool Mode Try  
run  
(Display:  
-
-
)
K 2  
K 3  
K 4  
Pump down  
(Display:  
View data display  
)
Outdoor PCB Display  
K4 View mode Display changes  
Push  
Display Explanation  
Present Compressor Frequency  
Push  
Display Explanation  
0
8
Discharge temperature  
1
2
3
4
5
6
7
Target Compressor Frequency  
Order Compressor Frequency  
EEV0 current step  
9
OLP temperature  
10  
11  
12  
13  
14  
15  
Condenser temperature  
Outdoor temperature  
First current  
EEV1 current step  
EEV2 current step  
Target Discharge temperature  
Total capacity of the indoor units  
Safety control  
EEV3 current step  
Fan RPM (H:high,L:low,Blank:off )  
• The EEV 2 and EEV 3 of MH050FXCA2A model is always displayed as blank.  
Samsung Electronics  
9-2  
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Troubleshooting  
2. Apply the power to the outdoor unit.  
Outdoor unit will try to communicate the number of indoor units specifiedꢀby SW01 on outdoor display PCB.  
Does LED show "Normal display"?  
OK : This number is displayed  
Yes  
"Normal display" means, right 2 digit of  
LED on Display PCB displays '00' and  
left 2 digit of LED displays indoor unit  
address number.  
only while communicating,  
so each number is displayed  
for a short time in order.  
Nꢀoꢀ  
No  
'' ''  
Is error code started with  
Nothing is displayed on the LED.  
displayed on the LED?  
Yes  
Check the power source,  
power cable & FUSE on  
the outdoor unit.  
Check the indoor unit, outdoor unit or wiring  
according the error code table.  
■ Pipe Checking Operation (Auto Addressing Mode)  
Automated checking of pipe connection (Auto addressing option)  
• Turn on the outdoor unit and wait for one minute.  
During these 60 seconds,the left display DIS01 will show sequentially  
00-01-02-03-...15-00.  
• E199 is showed on the display PCB of outdoor unit.  
-It means you didn’t do “Pipe check operation “  
• Push [K1 ] button on the display PCB of outdoor unit once, then begins to start “Pipe check operation ”  
with displaying as below.  
Button [K1] times  
DIS 01  
DIS 02  
Display  
[DIS 01 ] is flickering on the setting time.  
Outdoor Temperature  
32˚F or more  
(Cool mode)  
5min~10min  
less tha 32˚F  
Time duration  
(Heat mode)  
20min~50min  
9-3  
Samsung Electronics  
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Troubleshooting  
✳ Expected time of 4 indoor units installation.  
• [DIS02 ] shows the indoor unit under searching  
• It could take more time depending on the indoor and outdoor temperature.  
• After completeing pipe check operation,it shows “ “ on the display PCB.  
• The left display DIS01 will show sequentially the following message:  
00 -Estabilished communication with indoor unit “A ”;  
01 -Estabilished communication with indoor unit “B ”;  
02 -Estabilished communication with indoor unit “C ”;  
03 -Estabilished communication with indoor unit “D ”;  
00 -Estabilished communication with indoor unit “A ”...  
• Function of Step 3  
Mode  
Function  
Auto Addressing  
Checking the connection & addressing  
Manaul Addressing  
Checking the connection only  
- If the auto addressing does not work according to the indoor unit capacity, model or installation condition,apply the manual  
addressing.  
✳ When SW01 set "0"on Auto address mode,it means you install the maximum number of indoor unit.  
1) Installation ID Unit Number=MAX Installation ID Unit Number of OD Unit.  
➟ Don't need set SW01.  
2) Installation ID Unit Number<MAX Installation ID Unit Number of OD Unit.  
➟ Pls set SW01 as the number of which you install the indoor unit.  
✳ On Manual address mode,you must set SW01 as the number of which you install the indoor unit.  
- This mode is for finding the combination between indoor unit and each valve on the outdoor unit. Because refrigerant flow is  
controlled with EEV in the outdoor, controller should know which EEV will control which indoor unit.  
- Once "PIPE CHECK MODE" is done normally, each indoor unit will remember the given address number by the outdoor unit  
and no need to do this checking. But in case of listed below, PIPE CHECK MODE should be done again.  
• Re-install the system (ie.house moving)  
• Remove indoor unit, Add new indoor unit, Change indoor PCB for repair.  
• Mode change from "manual addressing" to "auto addressing"  
- On this mode the controller will ignore the manual address number set on the rotary switch on the indoor PCB.  
- To confirm the indoor address number assigned by this mode, use "TEST MODE" and the address number will be displayed on  
the LED display on the indoor unit.  
Samsung Electronics  
9-4  
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Troubleshooting  
■ In case of MANUAL ADDRESSING mode.  
Switch Setting and Testing Operation  
To complete the installation, perform the following checks and tests to ensure that the air conditioner is operating correctly.  
Step 1  
Review all the following elements in the installation:  
• Installation site strength  
• Piping connection tightness to detect any gas leakage  
• Connection wiring  
• Heat-resistant insulation of the piping  
• Drainage  
• Earthing wire connection  
Step 2  
IMPORTANT!  
Before selecting switch turn off the system power supply  
- Select rotary switch “SW01 ” of outdoor unit display PCB,according to number  
of indoor unit connected:  
Switch  
ex) connecting with ex) connecting with  
Indoor unit  
address  
2 indoor units.  
2 indoor units.  
Views data display  
Advise control we are going to proceeed  
with manual addressing as follow:  
SW02  
-Move dip switch n°1 of “SW02  
-outdoor unit display PCB ” down;  
Manual  
addressing  
Switch  
Indoor unit  
address  
Move down the switch nß1  
Views data display  
Step 3  
Step 4  
Follow of indication reported into table below for indoor unit addressing  
Turn on the system power supply and waiting for 60 seconds after estabilishing communication between outdoor and  
indoor units.  
During this phase,the left display of outdoor unit display PCB “DIS01 ” will count fom 00--01--02 to 15.  
Estabilished communication the left display will count sequentially:  
00--communication with indoor unit A;  
01--communication with indoor unit B;  
02--communication with indoor unit C;  
03--communication with indoor unit D;  
✳ In case of Manual address mode,you can do pipe check operation for check whether you connect the pipes correctly or not.  
But you need set indoor address switch yourselves.  
9-5  
Samsung Electronics  
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Troubleshooting  
Switch Setting and Testing Operation (cont.)  
TO SET ADDRESSING MANUALLY BY ROTARY  
SWITCH “SW02 ”  
TYPE  
PICTURE  
MODEL  
MH026FNCA  
MH035FNCA  
MH052FNCA  
RAC  
MH026FECA  
MH035FECA  
MH052FECA  
SLIM DUCT  
Samsung Electronics  
9-6  
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Troubleshooting  
Switch Setting and Testing Operation (cont.)  
ROTARY SWITCH “SW02 ” POSITION ACCORDING TO REFRIGERANT CIRCUIT  
CONNECTED (0=A;1=B;2=C;3=D )  
INSTALLATION TEST MODE (with all indoor units functioning)  
Please do cool mode try-run or heat mode try run.  
Cool mode try-run :Push the [K2 ] button three times.  
Heat mode try-run :Push the [K2 ] button once.  
After 12 minutes of stationary condition check each indoor unit air treatment:  
Cooling mode (indoor unit check) →ꢀInlet air temp.-Outlet air temp : From 10°K to 12°K (indicative delta T)  
Heating mode (indoor unit check) →ꢀOutlet air temp.-Inlet air temp : From 11°K to 14°K (indicative delta T)  
In heating mode,the indoor fan motor can remain off to avoid cold air blown into conditioned space.  
9-7  
Samsung Electronics  
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Troubleshooting  
● If Error code is displayed on indoor or outdoor LED, check as follows;  
- Manaul address setting  
Contents  
Q1  
Turn on the system. But outdoor units PCB displayed E201 or E101 Error code.  
Check point  
Remarks  
Outdoor PCB  
SW01  
Step 1  
Step 2  
Check to Number of indoor unit’s SW01.  
Check to power cable to indoor units.  
Check to communication cable indoor units.  
Wire connect  
Contents  
Turn on the system. But outdoor units PCB displayed E203 Error code.  
Check point  
Q2  
Remarks  
Outdoor communication error between the outdoor main  
PCB and sub PCB.  
.Outdoor PCB  
SW01  
Step 1  
Step 2  
Check to sub PCB wire and replace it.  
Wirre connect  
Contents  
Turn on the system. But indoor unit displayed E121/122/123/154 Error  
Explanation  
Q2  
Error code  
E121  
Indoor unit room temperature sensor error (open/short)  
Indoor unit heat exchanger in temperature sensor error (open/short)  
Indoor unit heat exchanger out temperature sensor error (open/short)  
Indoor unite fan error  
E122  
E123  
E154  
Please, all units turn off and check to indoor unit’s PCB and wire connection. E121/122/123 error detected, replace  
related sensor.  
Guicance  
Contents  
Turn on the system. But indoor unit displayed E162/163 Error code.  
Explanation  
Q4  
Error code  
E162  
Indoor unit EEPROM Error.  
Indoor unit EEPROM Option Error.  
E163  
Please, all units turn off and follow guidance.  
E163 : Please reset indoor Option code.  
Guidance  
If you don’t know about that, replace indoor unit PCB which is related.  
E162 : Please replace indoor unit PCB which is related.  
Contents  
Turn on the system. But outdoor unit displayed E221/237/251/320 Error  
Explanation  
Q5  
Error code  
E221  
Outside temperature sensor error (open/short)  
Indoor unit heat exchanger in temperature sensor error (open/short)  
Condenser temperature sensor error (open/short)  
Compressor Discharge temperature sensor error (open/short)  
Compressor OLP sensor error (open/short)  
E237  
E251  
E251  
E230  
Please, The System turn off and replace sensor which is related.  
Guidance  
Samsung Electronics  
9-8  
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Troubleshooting  
Contents  
Q1  
Indoor units address SW setting correct, but outdoor unit’s PCB displayed E201 Error Code.  
Check point  
Remarks  
Indoor unit’s sub PCB address SW or sub PCB is  
connected by mistake.  
Analysis  
Step 1  
Check to indoor unit’s sub PCB wire connecting  
condition.(misconnecting or Sub PCB is out of order)  
Indoor  
Sub PCB  
Step 2  
Address setting mode change to auto address setting.  
Following auto address setting steps.  
Step 3  
Manual Address setting is Option in FJM PLUS A.  
But we solved problem like this situation, with auto address setting.  
Guidance  
- Auto address setting  
Contents  
When the pipe checking operation is finished, outdoor sub PCB display E190 Error code.  
Q1  
Check point  
Remarks  
Outdoor unit fails to search indoor units or to check  
indoor address.  
Analysis  
Step 1  
The pipe checking operation  
Pipe connecting  
EEV Coil  
Whether The gas and liquid pipes are crossed with  
each other, check to connecting.  
Check to outdoor unit’s EEV coil being connected in  
proper location.  
Step 2  
Check to indoor unit’s sensor being connected in  
proper location.  
Step 3  
Indoor sensor  
During the pipe checking operation , system check temperature change of indoor Heat exchanger.In case, indoor  
sensor defect, EEV coil connector detach, malfunction of EEV, Leakage of Refrigerant, and etc can make this case.  
Guidance  
- Address setting another case  
Contents  
When the pipe checking operation is finished, outdoor sub PCB display E190 Error code.  
Q1  
Check point  
Remarks  
Outdoor unit fails to search indoor units or to check  
indoor address.  
Analysis  
Step 1  
The pipe checking operation  
Pipe connecting  
EEV Coil  
Whether The gas and liquid pipes are crossed with  
each other, check to connecting.  
Check to outdoor unit’s EEV coil being connected in  
proper location.  
Step 2  
Check to indoor unit’s sensor being connected in  
proper location.  
Step 3  
Indoor sensor  
During the pipe checking operation , system check temperature change of indoor Heat exchanger.In case, indoor  
sensor defect, EEV coil connector detach, malfunction of EEV, Leakage of Refrigerant, and etc can make this case.  
Guidance  
9-9  
Samsung Electronics  
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Troubleshooting  
- Operation case  
Contents  
Q1  
While using cooling or heating, indoor units display E161 Error code  
Check point  
Remarks  
This problem is caused by user’s fault. User’s simultaneously operate 2 more indoor units in the same time cooling  
and heating mode.  
Analysis  
Guidance  
FJM is operate by just cooling or heating mode only. (Only, HR system can operate cooling and heating mode  
simultaneously in the same time)  
Outdoor unit will be operate by first received signal, another operation signal is not applied system.  
Contents  
Q2  
While using cooling or heating, System turn off and display E416 Error code.  
Check point  
Remarks  
E416 is outdoor unit high discharge temperature safety control Error code.  
After System restart automatically until 3 times, system stop and display this error.  
System can be operated by remote controller signal and K3(reset) key input.  
Analysis  
Check outdoor units installation environment.  
(air flow blocking, the halation of another outdoor air flow)  
Step 1  
Step 2  
Step 3  
Check refrigerant leakage.  
Check outdoor EEV operation.  
Contents  
While using cooling or heating, System Turn off and display E458 Error code  
Check point  
Q3  
Remarks  
E458 Error is related with outdoor unit fan Error.  
Analysis  
Especially, If system have a some problem in fan, in heating mode , it will be happened.  
And In auto address setting, without pipe checking operation must be happened it.  
Step 1  
Step 2  
Check to outdoor fan operation.  
If outdoor fan operation is clear, start to pipe checking operation.  
When Auto address setting is finished without pipe checking operation, in heating mode, outdoor unit refrigerant  
distribution control is malfunction.  
It make our system to confuse it’s condition.  
Guidance  
But, basically this error code is concerned about fan error.  
Contents  
Q4  
While using cooling mode, outdoor unit turn off and display E401 Error code.  
Check point  
Remarks  
This is caused by protection mode behavior.  
This is indoor Evaporator Freezing protection mode.  
Analysis  
Step 1  
Step 2  
Please, check indoor unit, whether inlet or outlet grill is closed.  
Please, check indoor unit, whether indoor fan is working.  
Samsung Electronics  
9-10  
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Troubleshooting  
Contents  
Q5  
When system start in cooling mode, System don’t operate and display E441 Error code  
Check point  
Remarks  
FJM PLUS is able to operate by -10˚C  
But we admit that minimum Cooling temperature is by -5˚C  
Please, Remember cooling operation range.  
Analysis  
Contents  
While using heating, outdoor unit turn off and display E404 Error code.  
Check point  
Q6  
Remarks  
Heating overload safety mode make this situation.  
After System restart automatically until 3 times, System display this error code and stop.  
System can operate by remote controller input signal or K3(reset) key input.  
Analysis  
Step 1  
Step 2  
Check indoor units air flow.  
Check outdoor unit air flow and installation (outdoor air flow blocking & over charging)  
Contents  
Q7  
When system start in Heating mode, System don’t operate and display E440 Error code.  
Check point  
Remarks  
FJM PLUS is able to operate up to 30˚C  
But we admit that Maximum Heating temperature is up to 24˚C  
Please, Remember Heating operation range.  
Analysis  
- Try-run Check Error  
Contents  
While the system is working try-run mode, system turn off and display E128 / 129 / 246 / 261 / 419 / 422 / 554  
Error code.  
Q8  
Check point  
Remarks  
These Error codes only apply with Try-run mode, in case of system have some defect as result of try-run operation.  
✳ Refer to self-detection algorithm (Check Error Code meaning and check it out)  
Analysis  
9-11  
Samsung Electronics  
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9-3 Fault Diagnosis by Symptom  
9-3-1 Basic Check Flow  
Preparation : multimeter (AC voltage, DC voltage, Resistance)  
START  
Check point  
Short check  
for safety  
Detach cable cover of the terminal blocks  
(HANDLE CABI RH) on outdoor unit.  
No Good  
• Outdoor unit controller (see 12-3-2)  
• Indoor unit controller (see 12-3-3)  
Check resistance value between  
L and N of Main power terminal block.  
OK : over 180KΩꢀ  
Apply the power  
Power Source  
check  
No Good  
No Good  
• Power cable (see 12-3-4, 12-2)  
• Breaker  
Check AC voltage between L and N of  
MAIN power terminal block.  
OK : 207-253V(50Hz)  
Check AC voltage between L and N of  
power terminal block for indoor unit.  
Terminal block wiring  
OK : 207-253V  
Is there any display of LED?  
Yes  
Outdoor unit  
• Main PCB,  
• Display PCB,  
• wiring between PCBs.  
No  
No Good  
Starting by remocon or ON/OFF switch on the indoor  
unit or K2 button on the Outdoor PCB display.  
Start operation  
Yes  
Error code starts in '' ''  
Any Error code on LED display?  
Wait for 5 minutes to check error  
code because some error judgement  
needs long time.  
Consult error code table  
No  
• Remote control  
• Remote control battery  
• Infrared signal receiving path  
(front panel duct, infrared receiving module, wiring)  
No  
No  
Receiving of remote control signal ?  
(Check by buzzer sound)  
Indoor unit  
Yes  
Check operation ON/OFF by the button  
at lower right of the display module  
(By buzzer sound and LED display)  
• Indoor unit,  
• Wiring cable to outdoor unit  
Yes  
Error code starts in '' ''.  
Error code consists of 4 digits and displays first 2  
digit and last 2 digit alternatively.  
Ok  
Any Error code on LED display?  
Wait for 5 minutes to check error code  
because some error judgement  
needs long time  
Consult error code table  
Check Major parts(See 12-5)  
Consult error code(Next Page)  
Samsung Electronics  
9-12  
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Troubleshooting  
Basic Check Flow(cont.)  
Preparation : multimeter (AC voltage, DC voltage, Resistance)  
Consult Error Code  
Check point  
,
,
,
,
,
• Cable wiring between indoor and outdoor  
• Communication wire socket check on  
outdoor unit controller PCB  
Is the error code related to  
communication ?  
No  
,
• Cycle check  
• Pipe matching  
Is the error code related to  
cycle protection ?  
No  
,
,
Are some of the indoor units’  
operation mode (cooling/heating)  
different from others ?  
Each indoor unit operation mode  
No  
--  
,
Error related to outdoor controller except  
temperature sensor and communication  
between indoor unit and outdoor unit ?  
Consult LED pattern on wiring diagram on  
outdoor controller  
No  
See Error Code Table and Check  
“Main checking point”  
9-13  
Samsung Electronics  
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Troubleshooting  
9-3-2 Checking Outdoor Controller  
1. Making sure the wire connections.  
2. Checking AC line  
1) Checking FUSE  
2) Checking resistance between 'L wire (SKY BLU)' and 'BD01  
Neutral' normal value : 190 - 210Ωꢀ  
If value is ∞ꢀthen check R001.  
Live  
Neutral  
3) Checking resistance between 'N wire (BRN)' and 'BD01 Live side'  
normal value : 0 - 0.1Ωꢀ  
3. Checking ON/OFF pattern of LED1(Red), LED2(Green), LED3(Yellow)  
Apply the power then ALL LEDs are on for about 1 second. then changed to as follow.  
■ LED1 (Red) : ALWAYS ON  
■ LED2 (Green) : Blinking 4 times a second  
(This means communication between 2 micoms IC01 and IC50 is normal)  
■ LED3 (Yellow) : OFF  
● In case of another pattern inverter micom detects some hardware trouble or abnormal condition.  
Yellow  
Green  
Red  
Description  
Note  
Status indication  
OFF  
ON  
OFF  
ON  
OFF  
ON  
Power OFF / No power (SMPS error)  
Power on reset ( 1~2 seconds )  
Normal operation  
If always in this pattern IC01(inverter micom)  
has some trouble.  
OFF  
Blink  
ON  
Hardware trouble  
Communication Error between  
Main micom and inverter micom  
OFF  
OFF  
ON  
Blink  
ON  
Blink  
Blink  
ON  
Current sensor error  
DC-LINK sensor error  
Blink  
AC-Line zero crossing error  
After power off this error will display until  
ON  
ON  
ON  
Blink  
Blink  
DC LINK capacitor discharged.(Max 20sec.)  
OFF  
Option error (EEPROM error)  
Abnormal condition  
OFF  
OFF  
ON  
OFF  
Blink  
OFF  
ON  
Blink  
OFF  
ON  
Comp. peak current (Over Current)  
Comp. starting error  
Comp. rotation error  
OFF  
Blink  
Blink  
OFF  
DC-Link voltage error  
Comp. V Limit Error  
ON  
Samsung Electronics  
9-14  
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Troubleshooting  
4. Checking Display PCB LED if Error code is displayed.  
See error code table if displayed.  
5. Checking DC voltage on each point  
Item  
Measuring point  
Normal value  
about 1.4 times as much as Power AC Voltage  
DC LINK  
Q803 E(-)~D101 Cathode (+)  
ex) AC220V → 305~310Vdc  
inverter 15V  
Main control 12V  
Main control 5V  
C803 voltage  
14.5V~15.5V  
12V~15V  
CN59 pin 1~pin 3  
CN59 pin 1~pin 2  
4.75V~5.25V  
6. Checking PFC  
When Input current is over 2.8A PFC circuit will work to control the harmonics of AC current.  
Checking is measuring DC-LINK voltage.  
PFC ON (Compressor is working) : DC LINK voltage is over 300Vdc (AC line >220V )  
After starting compressor DC Link voltage is going down because of compressor load.  
But in case of 2.8A above , DC link voltage will go up over 300V. This voltage is in proportion to AC input voltage.  
Current can be monitored with "VIEW MODE".  
Press K4 key on the outdoor display PCB for several times to change the display to sensor temperature value.  
Left 1 digit of the LED is data index and Right 3 digits are the value  
Index  
Value  
Remark  
Estimated Primary current value from  
Compressor current  
C
The unit is 0.1A  
9-15  
Samsung Electronics  
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Troubleshooting  
9-3-3 Checking Indoor controller  
9-3-4 Checking Power cable and Communication cable  
See 12-2 "Checking and Testing operations" and installation manual.  
9-3-5 Checking Temperature sensor  
See 12-5 "Fault Diagnosis of Major Parts".  
In case of a sensor in outdoor unit, temperature can be monitored with "VIEW MODE".  
Press K4 key on the outdoor display PCB for several time to change the display to sensor temperature value.  
Left 1 digit of the LED is data index and Right 2 digits are the value.  
Index  
Value  
Discharge sensor temperature  
Remark  
8
9
OLP sensor temperature  
The unit is degree C  
A
B
Condenser sensor temperature  
Outdoor sensor temperature  
Samsung Electronics  
9-16  
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Troubleshooting  
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Index  
Value  
Remark  
3
4
5
6
EEV-A step  
EEV-B step  
EEV-C step  
EEV-D step  
The step value range is  
between Zero and 480.  
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9-17  
Samsung Electronics  
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9-4 PCB Inspection  
9-4-1 Cautions for Part Replacement  
1. The human body carries much static electricity.  
Before touching a part for repair, replacement or the  
similar purpose, be sure to touch a grounded metal-  
lic portion by hand to let the static electricity go  
through the metallic portion to the earth.  
Especially when handling any micro computer or IC,  
carefully remove such static electricity before touch-  
ing them.  
6. When soldering any part, care should be exercised  
not to apply any high-wattage soldering iron to the  
part for a long time. Some parts are of so low a heat  
resistance that they may be broken or have the  
properties changed if a soldering iron is so applied  
(Otherwise, the pattern may possibly be separated  
and raised).  
7. The heat of the soldering iron should be transferred  
to the entire object to be soldered. If the solder  
pieces are not well fused due to insufficient transfer  
of the heat from the soldering iron, no satisfactory  
electrical continuity can be assured even if the sol-  
dered objects appear well connected to each other.  
2. When repairing any part on a work bench, be sure  
to place an insulative sheet on the bench and always  
keep the sheet surface neat without any metal frag-  
ments. If any such fragment touches a part, a sec-  
ondary trouble will possibly be caused in the part.  
3. Before replacing any parts, be sure to turn off the  
power supply. If such replacement is done with the  
power supply kept on, an electric shock, short circuit  
or destruction of a part may result.  
8. The solder used should be limited to a minimum.  
If excessive solder is used, it will cause inter-pattern  
contact, which may cause malfunction of the circuit.  
9. Although some part of the PCB surface are coated  
with coating material for protection from dust and  
dirt, soldering is also available to the coating part.  
Because this coating is thin and is weak for solder-  
ing heat.  
4. During replacement or repair of a part, carefully han-  
dle it : The printed circuit board has fine lead wires  
(jumper wires) and glass-made parts (diode) on its  
substrate.  
So if a circuit board is roughly handled, such lead  
wires and parts will be easily broken or damaged by  
bending or shock.  
But coating material remaining on the solder part  
should be cleaned up before soldering a new  
component to prevent the solder part from becoming  
bad conduction.  
5. When soldering the lead wires of any new part, be  
sure to polish them using an emery paper or the like  
before soldering them.  
Since the lead wires of any new part are covered  
with an oxide film, solder cannot adhere to the lead  
wires if not polished.  
9-4-2 Procedure  
The parts should be replaced in the following procedure.  
Check for any faulty part.  
Detach the faulty part.  
Replace it with a new part.  
Check the operation of the new part.  
The repair is completed.  
Samsung Electronics  
9-18  
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10. Reference for Installation  
10-1 Selecting Area for Installation  
Select an area for installation that is suitable to customer’s needs.  
10-1-1 Indoor Unit  
1. Make sure that you install the indoor unit in an area providing good ventilation.  
It must not be blocked by an obstacle affecting the airflow near the air inlet and the air outlet.  
2. Make sure that you install the indoor unit in an area allowing good air handling and endurance of vibration of the indoor unit.  
3. Make sure that you install the indoor unit in an area where there is no source of heat or vapor nearby.  
4. Make sure that you install the indoor unit in an area from which hot or cool air is spread evenly in a room.  
5. Make sure that you install the indoor unit in an area away from TVs, audio units, cordless phones, fluorescent lighting fixtures  
and other electrical appliances (at least 3.3ft).  
6. Make sure that you install the indoor unit in an area which provides easy pipe connection with the outdoor unit, and easy  
drainage for condensed water.  
7. Make sure that you install the indoor unit in an area which is large enough to accommodate the measurements shown in  
figure on the next page.  
• It is harmful to the air conditioner if it is used in the following environments: greasy areas (including areas  
near machines), salty areas such as coast areas, areas where sulfuric gas is present such as hot spring  
areas. Contact your dealer for advice.  
10-1  
Samsung Electronics  
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Reference for Installation  
10-1-2 Outdoor Unit  
1. Make sure that you install the outdoor unit in area not exposed to the rain or direct sun light.(Install a separate sunblind if  
exposed to direct sun light.)  
2. Make sure that you install the outdoor unit in area allowing the good air moment, not amplifying noise or vibration, especially  
to avoid disturbing neighbors. (Fix the unit firmly if it is mounted in a high place.)  
3. Make sure that you install the outdoor unit in area providing the good ventilation and which is not dusty. It must not be  
blocked by any obstacle affecting the airflow near the air inlet and the air outlet.  
4. Make sure that you install the outdoor unit in area free from animals or plants.  
5. Make sure that you install the outdoor unit in area not blocking the traffic.  
6. Make sure that you install the outdoor unit in area easy to drain condensed water from the indoor unit.  
7. Make sure that you install the outdoor unit in area which provides easy connection within the maximum allowable length of a  
coolant pipe.  
If you install the excessive length of pipe, add additional refrigerant as 0.11 oz per unit ft; refer to the table below.  
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8. Make sure that you install the outdoor unit in an area which is large enough to accommodate the measurements shown in  
figure on the next page.  
10-1-3 Remote Control Unit  
1. Make sure that you use the remote control unit in an area free from obstacles such as curtains etc, which may block signals  
from the remote control unit.  
2. Make sure that you put the remote control unit in an area not exposed to direct sunlight, and where there is no source of  
heat.  
3. Make sure that you use the remote control unit in an area away from TVs, audio units, cordless phones, fluorescent lighting  
fixtures and other electrical appliances (at least 3.3ft).  
Samsung Electronics  
10-2  
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10-2 Connecting Up and Purging the Circuit  
• The air in the indoor unit and in the pipe must be purged. If air remains in the refrigeration pipes, it will affect  
the compressor, reduce to cooling capacity and could lead to a malfunction. Refrigerant for air purging is not  
charged in the outdoor unit. Use Vacuum Pump as shown at the right figure. Each unit must be purged in turn.  
■ MH050FXCA2A  
1. Check the piping connections.  
2. Connect the charging hose of low pressure side of manifold gauge to the  
packed valve having a service port (3/8" service valve) as shown at the  
figure.  
3. Open the valve of the low pressure side of manifold gauge counter-  
Indoor  
clockwise.  
A-unit  
Indoor  
B-unit  
4. Purge the air from the system using vacuum pump for about 10 minutes.  
• Close the valve of the low pressure side of manifold gauge clockwise.  
• Make sure that pressure gauge show -0.1MPa(-76cmHg) after about  
10 minutes.  
Vacuum  
Pump  
• This procedure is very important in order to avoid gas leak.  
• Turn off the vacuum pump  
• Remove the hose of the low pressure side of manifold gauge.  
5. Set valve cork of both liquid side and gas side of packed valve to the  
open position.  
Valve stem  
Stem cap  
6. Mount the valve stem nuts and the service port cap to the valve, and  
tighten them at the torque of 183kgf•cm with a torque wrench.  
Service port  
7. Check for gas leakage.  
• At this time, especially check for gas leakage from the 3 way valve’s  
stem nuts, and from the service port cap.  
10-3  
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Reference for Installation  
■ MH080FXCA4A  
1
2
Check the piping connections.  
Connect the charging hose of low pressure side of manifold gauge to the  
packed valve having a service port (5/8” Packed valve)as shown at the  
figure (Value stem:1/2”-20UNF).  
WARNING:  
Make the electrical connection and leave the system into “stand by  
mode”. Do not turn on the system!.  
Aꢀ  
Bꢀ  
Cꢀ  
This is necessary for better vacuum operation (full OPEN position of  
Electronic Expansion Valve -EEV -).  
Vacuum  
Pump  
3
4
Open the valve of the low pressure side of manifold gauge ounter  
clockwise.  
Purge the air from the system using vacuum pump for about 30 minutes.  
- Close the valve of the low pressure side of manifold gauge clockwise.  
- Make sure that pressure gauge show -0.1MPa(-76cmHg)after about  
30 minutes.  
Valve stem  
Stem cap  
This procedure is very important in order to avoid gas leak.  
- Turn off the vacuum pump.  
- Remove the hose of the low pressure side of manifold gauge.  
Service port  
5
Set valve cork of both liquid side and gas side of packed valve to the  
open position.  
6
7
Mount the valve stem nuts and the service port cap to the valve,and  
tighten them at the torque of 183kgf•cm with a torque wrench.  
Check for gas leakage.  
- At this time,especially check for gas leakage from the 3-way valve ’s  
stem nuts,and from the service port cap.  
Samsung Electronics  
10-4  
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10-3 Refrigerant Refill  
10-3-1 MH050FXCA2A  
Refill an air conditioner with refrigerant when refrigerant has been leaked at installing or using.  
1) Purge air(for new installation only).  
2) Turn the 3 way valve clockwise to close,  
connect the pressure gauge (low pressure side)  
to the service valve, and open the 3 way valve  
Suspension hook  
High  
pressure  
gauge  
Compound  
gauge  
again.  
Hand  
wheel  
Finger tight  
fittings  
3) Connect the tank to refill with refrigerant.  
Connected to  
high pressure  
side  
For mounting  
other and of  
hose when  
not in use  
Charging line  
4) Set the unit to cool operation mode.  
5) Check the pressure indicated by the pressure  
gauge(low pressure side).  
2
* Standard pressure should be 8.0~9.0kg/cm  
in a regular and high operation mode.  
6) Open the refrigerant tank and fill with refrigerant  
until the rated pressure is reached.  
* It is recommended not to pour the refrigerant  
in too quickly, but gradually while operating a  
pressure valve.  
7) Stop operation of the air conditioner.  
8) Close the 3 way valve, disconnect the pressure  
gauge, and open the 3 way valve again.  
9) Close the cap of each valve.  
10-5  
Samsung Electronics  
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Reference for Installation  
10-3-2 MH080FXCA4A  
Refill an air conditioner with refrigerant when refrigerant has been leaked at installing or using.  
1) Purge air(for new installation only).  
2) Turn the 5/8" service valve clockwise to close,  
connect the pressure gauge (low pressure side)  
to the service valve, and open the 5/8" service  
Suspension hook  
High  
pressure  
gauge  
Compound  
gauge  
valve again.  
Hand  
wheel  
Finger tight  
fittings  
3) Connect the tank to refill with refrigerant.  
4) Set the unit to cool operation mode.  
Connected to  
high pressure  
side  
For mounting  
other and of  
hose when  
not in use  
Charging line  
5) Check the pressure indicated by the pressure  
gauge(low pressure side).  
2
* Standard pressure is should be 8.0~9.0kg/cm  
in a regular, high operation mode.  
6) Open the refrigerant tank and fill with refrigerant  
until the rated pressure is reached.  
* It is recommended not to pour the refrigerant  
in too quickly, but gradually while operating a  
pressure valve.  
7) Stop operation of the air conditioner.  
8) Close the 5/8" service valve, disconnect the  
pressure gauge, and open the 5/8" service valve  
again.  
9) Close the cap of each valve.  
Samsung Electronics  
10-6  
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10-7  
Samsung Electronics  
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10-5 Flare Nut Fixing Torque  
..  
Torque((kkgg cm)  
Outer diameter  
Fixing Torque  
Final Torque  
ø 1/4 inch  
(Liquid Side)  
160  
200  
ø 3/8 inch  
(Gas Side)  
300  
500  
350  
550  
ø 1/2 inch  
(Gas Side)  
Samsung Electronics  
10-8  
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10-6 "Pump down" Procedure  
10-6-1 MH050FXCA2A  
Pump down will be carried out when an evaporator is replaced or when the unit is relocated in another area.  
1) Remove the caps from the 2 way valve and  
the 3 way valve.  
2 way Valve  
2) Turn the 3 way valve clockwise to close and  
connect a pressure gauge (low pressure side)  
to the service valve, and open the 3 way valve  
again.  
3 way Valve  
3) Set the unit to cool operation mode.  
(Check if the compressor is operating.)  
4) Turn the 2 way valve clockwise to close.  
5) When the pressure gauge indicates "0" turn the  
3 way valve clockwise to close.  
6) Stop operation of the air conditioner.  
7) Close the cap of each valve.  
Relocation of the air conditioner  
• Refer to this procedure when the unit is relocated.  
• 1. Carry out the pump down procedure (refer to the details of ‘pump down’).  
• 2. Remove the power cord.  
• 3. Disconnect the assembly cable from the indoor and outdoor units.  
• 4. Remove the flare nut connecting the indoor unit and the pipe.  
• 4. At this time, cover the pipe of the indoor unit and the other pipe using a cap or vinyl plug to avoid foreign  
material entering.  
• 5. Disconnect the pipe connected to the outdoor unit.  
• 4. At this time, cover the valve of the outdoor unit and the other pipe using a cap or vinyl plug to avoid foreign  
material entering.  
• 6. Make sure you do not bend the connection pipes in the middle and store together with the cables.  
• 7. Move the indoor and outdoor units to a new location.  
• 8. Remove the mounting plate for the indoor unit and move it to a new location.  
10-9  
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Reference for Installation  
10-6-2 MH080FXCA4A  
Pump down will be carried out when an evaporator is replaced or when the unit is relocated in another area.  
1) Remove the caps from the 3/8" service valve and  
the 5/8" service valve.  
5/8" Service Valve  
3/8" Service Valve  
2) Turn the 5/8" service valve clockwise to close and  
connect a pressure gauge (low pressure side)  
to the service valve, and open the 5/8" service valve  
again.  
3) Set the unit to cool operation mode.  
(Check if the compressor is operating.)  
4) Turn the 3/8" service valve clockwise to close.  
5) When the pressure gauge indicates "0" turn the  
5/8" service valve clockwise to close.  
6) Stop operation of the air conditioner.  
7) Close the cap of each valve.  
Relocation of the air conditioner  
• Refer to this procedure when the unit is relocated.  
• 1. Carry out the pump down procedure (refer to the details of ‘pump down’).  
• 2. Remove the power cord.  
• 3. Disconnect the assembly cable from the indoor and outdoor units.  
• 4. Remove the flare nut connecting the indoor unit and the pipe.  
• 4. At this time, cover the pipe of the indoor unit and the other pipe using a cap or vinyl plug to avoid foreign  
material entering.  
• 5. Disconnect the pipe connected to the outdoor unit.  
• 4. At this time, cover the valve of the outdoor unit and the other pipe using a cap or vinyl plug to avoid foreign  
material entering.  
• 6. Make sure you do not bend the connection pipes in the middle and store together with the cables.  
• 7. Move the indoor and outdoor units to a new location.  
• 8. Remove the mounting plate for the indoor unit and move it to a new location.  
Samsung Electronics  
10-10  
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11. Reference Information  
11-1 Index for Model Name  
FREE JOINT MULTI FOR EUROPE  
M
H
052  
F
P
E
A
4
A
/
O
O
O
Buyer code  
Product Type  
Capa  
Rating voltage  
115V, 60Hz  
Combination Quantity  
M
Multi  
*10Kw(3 digit)  
A
B
C
D
E
M
_,12.. Indoor  
FJM  
220V, 60Hz  
1,2.. Outdoor  
208~230V, 60Hz  
200~220V, 50Hz  
220~240V, 50Hz  
127V, 50Hz  
Mode  
C/O  
Comp. Type  
C
H
F
Free Inverter  
Version  
_,12.. Indoor  
H/P  
D
Redd Digital Scroll  
_,A,B.. Outdoor  
Indoor/Outdoor Type  
Refrigerant  
R22  
K
1 way  
Z
C
A
S
M
D
E
Slim 1 way  
Mini 4 way  
Silhouette  
Slim  
CST  
Duct  
R407C  
R410A  
P
G-P  
W
V
HB  
RAC  
Vivave  
R
N
X
Moderato  
Console  
Outdoor  
CONV  
11-1  
Samsung Electronics  
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Index for Model Name (cont.)  
FREE JOINT MULTI FOR EUROPE  
M
H
V
V
1
X
-
07  
/
O
O
O
1
8
Buyer code  
Product Type  
Capa  
Serial Version  
Basic  
Indoor Capacity  
- CAP Indoor(K BTU)  
M
Multi  
*K BTU  
1
2
FJM  
MR(02R~)  
_
Outdoor  
Mode  
C/O  
Refrigerant  
R410A Inverter  
R22  
C
H
V
Z
Semi Product  
Indoor  
H/P  
_
C
R407C  
X
Outdoor  
Indoor Type  
G-P  
P
W
V
HB  
RAC  
Vivave  
Moderato  
R
Samsung Electronics  
11-2  
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11-2 Refrigerating Cycle Diagram  
■ MH050FXCA2A  
11-3  
Samsung Electronics  
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Reference Information  
■ MH080FXCA4A  
Samsung Electronics  
11-4  
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11-3 Pressure & Capacity mark  
■ Power/Heat  
.
.
W
cal/s  
0.23885  
kcal/h  
0.85985  
Btu/h  
3.4121  
HP  
0.001341  
0.0056146  
0.0015596  
3.9302x10-4  
1
kg m/s  
ib m/s  
1
0.10197  
0.73756  
4.1868  
1.163  
1
3.6  
14.286  
3.9683  
1
0.42693  
0.11859  
0.029885  
76.04  
3.088  
0.85778  
0.21616  
550  
0.27778  
0.06999  
178.11  
2.3423  
0.32383  
1
0.29307  
745.7  
0.252  
641.19  
8.4322  
1.1658  
2,544.4  
33.462  
4.6262  
9.8067  
1.3558  
0.013151  
0.0018182  
1
7.233  
1
0.13826  
11-4 The abbreviated technology words & the definition of technology terms  
Abbreviated technology words  
Definition of technology terms  
One that compresses, especially a machine used to compress gases.  
One that blows, especially a mechanical device, such as fan, that produces a current of air.  
A device for reeating a current of air or a breeze.  
COMP(Full name compressor)  
BLOWER  
FAN  
A restraining device of air-condition, measure, or limit.  
ASS’Y CONTROL BOX  
(Full name : Assemble control box)  
Something, such as a machine or an engine, that produces or imparts motion.  
MOTOR  
Heat exchanger; A device, used to transfer heat from a fluid on one side of a barrier to a fluid  
on the other side without bringing the fluids into direct contact.  
ASS’Y EVAP/ASS’Y COND  
(Full name : assemble evaporator /  
assemble condenser)  
11-5  
Samsung Electronics  
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11-5 Q & A for Non-trouble  
Classification  
Class  
Q
Description  
The cooling is weak.  
A
When it is hot outside, its cooling capacity decreases due to the increase of the ambient temperature.  
When the dust filter gets blocked or warm outside air gets in, the cooling capacity will decrease. So,  
make sure to clean the dust filter frequently, prevent heat loss by closing the doors and insulate the  
cooling area by using curtains, blinds, shades or window tinting.  
Q
The cooling is good generally. But, it gets weak when it is considerably hot.  
A
It occurs when the outdoor unit is exposed to direct sun light and heat-up air is not ventilated well.  
So, set up a sunblind over the outdoor unit and keep stuff away from the unit to increase the ventila-  
tion. When the cooling capacity decreases during a heat wave, clean the heat exchanger of the out-  
door unit or spray some cold water to the heat exchanger to increase the cooling capability.  
Cooling  
Q
The cooling is weak. Does it need refrigerant charging?  
A
It is not correct charging refrigerant regularly. Except that you have moved in several times or the  
connection pipes are broken, the refrigerant does not run low. So, when refrigerant is additionally  
charged, it could be costly and cause a product's failure. When the refrigerant leaks, all of it will  
escape in a short time resulting in cooling failure and no water coming out of the drain hose. So, if  
water comes out from the drain hose, it indicates the normal operation of the product and it does not  
need refrigerant charging.  
Q
It fails to do cooling.  
A
When the air conditioner is set to Ventilation or the desired temperature is set higher than the current  
temperature, it fails to do cooling. In this case, select Cooling or set the desired temperature lower.  
Q
It floods the floor.  
A
Place the drain hose properly. When it is not placed properly, the drain water would flow back flooding  
the floor. So, straighten out the drain hose for the water to be drained well.  
Q
Water drips at the drain connection (service valve) of the outdoor unit.  
A
When a glass bottle is taken out of the refrigerator, moisture gets condensed on its surface due to the  
temperature differences. The same principle applies to the air conditioner. When cold refrigerant goes  
through the copper tube, moisture gets condensed on the surface of the tube and the connection  
areas. To prevent the water condensation, the pipes are insulated. But, the connection areas of the  
outdoor unit are not insulated for the purpose of maintenance or repair, and water gets condensed due  
to the temperature differences and drips down. Generally, it evaporates right away. But, when it drips  
much during muggy days, put a water pan on the floor.  
Leakage  
Q
It leaks even though a drain pump is used.  
A
It occurs when the drain pump is plugged out or it is out of order. Check the power of the drain pump  
and the position of the drain hose, and when the pump is faulty, contact the drain pump manufacturer.  
Samsung Electronics do not manufacture drain pumps. So, we are not able to correct the drain pump  
problems.  
Q
Whenever the air conditioner is turned on, it irritates my eyes and gives me a headache.  
A
There are no components in the air conditioner irritating the eyes and sending out chemical smells.  
But, when the air conditioner is turned on, other smell sources are sucked into the air conditioner and  
get out of it. So, find and root out the smell sources. Generally, it occurs at a interior renovated place,  
a pharmacy, a gasoline handling place, a tire shop, a second-hand book shop or an electronic  
Smells  
Samsung Electronics  
11-6  
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Q & A for Non-trouble (cont.)  
Classification  
Class  
Description  
component handling place; when its chemical or musty smells are sucked in and sent out, it can be  
misled that the air conditioner generates them. So, find and root out the problem or refresh the room  
frequently.  
Q
Whenever the air conditioner is turned on, it stinks.  
A
There are no components in the air conditioner sending out chemical smells. But, when the air condi-  
tioner is turned on, other smell sources are sucked into the air conditioner and get out of it. So, find  
and root out the smell sources. Generally, when the drain hose is taken out to the washing room or  
there are sources of smells such as a diaper bin, a shoe shelf or a socks bin, bad smells generate.  
Also, it occurs where glass cleaners or air fresheners are used; when they are sucked in interacting  
with dusts and moistures inside, bad smells generate. These kinds of organic materials noxious to  
human bodies. So, we recommend against the use of them.  
Q
Whenever the air conditioner is turned on, it smells sour.  
A
When the room is papered recently, its paste smells would be sucked inside. Also, when the air condi-  
tioner is installed in the study room of young boys loving sweat-generating activities such as the bas-  
ketball, excessive sweats evaporate and get sucked into the air conditioner resulting in bad smells. So,  
find and root out the problem or refresh the room frequently.  
Smells  
Q
Whenever the air conditioner is turned on, it smells musty.  
A
It is due to the improper keeping of the product after its use. When keeping the product, dry up the  
inside with the operation of Ventilation to prevent must. When the product is kept without drying up the  
inside with Ventilation, mold would grow inside resulting in must. So, open the windows and switch on  
the Ventilation function to get rid of the saturated smell inside.  
Q
Whenever the air conditioner is turned on, it sends out bad smells such as stale smells.  
A
It occurs generally when there are pet animals in the house. Their smells stay at the same place.  
But, when the air conditioner is turned on, the air gets circulated resulting in the circulation of the  
smells. So, find and root out the problem or refresh the room frequently.  
Q
It sends out bad smells.  
A
When the air filter is filthy, it could send out bad smells. So, clean the filter and ventilate the room with  
the windows open while operating the Ventilation function.  
Q
A
Q
A
It won't start.  
There is a power failure or it is plugged out. Also, check if the power distribution panel is switched off.  
It goes off during operation.  
When the hot air does not escape properly, it goes off during operation. It occurs when it does not  
ventilate properly because the outdoor unit is covered, the back of the outdoor unit is blocked by a  
cardboard or a plywood panel, and the front of the outdoor unit is blocked by the closed window or  
other obstacles. Clear the above obstacles from the outdoor unit.  
Operation  
Q
It generally works properly. But, when it's considerably hot, it goes off during operation.  
A
It occurs when the outdoor unit is exposed to direct sunlight and the hot air does not escape properly.  
Set up a sun blind over the outdoor unit and clear the neighboring obstacles from the outdoor unit to  
provide good ventilation. When it goes off frequently during a heat wave, it would prevent the turn-off and  
increase the cooling capacity cleaning the outdoor unit or spraying some water to the heat exchanger.  
11-7  
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Q & A for Non-trouble (cont.)  
Classification  
Class  
Q
Description  
The remote controller won't operate.  
A
When the batteries run out or the transmitter or receiver of the remote controller is blocked by obsta-  
cles, change the batteries or keep the obstacles away from the controlling area. Also, the remote con-  
troller may not work under intensive light from a 3-wave length lamp or a neon sign due to the EMI.  
In this case, take the remote controller closer to the receiver.  
Operation  
Q
Who installs the air conditioner? (Relocation/Re-installation)  
A
When relocating or re-installing the air conditioner, make sure to contact Samsung Electronics Service  
Center or Authorized Service Agent and have them to do the job.(If not, it could cause personal injury  
or product damage.)  
The cost for the relocation/re-installation of the air conditioner is subject to the customer's expense.  
There is a cost table. But, our service engineer needs to visit to total up the cost correctly.  
When you move in, make sure to contact Samsung Electronics Service Center or Authorized Service  
Agent in advance to streamline the process.  
Q
Is it possible to install the outdoor unit outside?  
A
It is possible to install it at a designated place in the apartment or on the rooftop nearby.  
But, it's illegal hanging an angle iron case with the outdoor unit in it outside the apartment. Also, it is  
illegal obstructing passers-by with the outdoor unit installed outside.  
Installation  
Q
What can be done to install the outdoor unit facing the road because it is a commercial building?  
A
The following is an excerpt from Building Code going into effect from JUNE 1st 2005. "The exhaust  
pipe of a cooling or ventilation facility installed in a building adjacent to the streets of commercial or  
residential areas shall be installed higher than 2m to prevent the exhaust air from blowing directly to  
passers-by and the current facilities shall be corrected by MAY 31st 2005." So, please install it higher  
than 2m or not to blow the hot exhausting air directly to passers-by.  
Q
What about installing a windscreen during installation not to blow hot air directly to passers-by?  
A
When the hot air from the front of the outdoor unit is blocked, the product's performance will be  
affected and it will fail to operate properly. So, keep it at least 300mm away from its surrounding walls  
and give it good ventilation.  
Samsung Electronics  
11-8  
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11-6 Common sense of refrigeration  
11-6-1 Air supplier  
■ Air supplier?  
It supplies fresh air to the building or room through procedure of air circulation for fresh environment.  
■ Effectiveness of air supplier  
It diminishes the stress or fatigue and enhances vivid desire through fresh air circulation. Also, filthy air indoor is being  
cleaned by Air-Filter and it keeps clean and fresh environment and dehumidification. Temperature, humidity, air stream,  
cleanness are called for factors of air supplier and they are kept in proper condition for usage purpose.  
Humidity  
(Moisture)  
Control the indoor air into cool or warm  
Remove humidity in air or humidify  
Temperature  
(Heat)  
Air stream  
(Aircirculation)  
Cleanness  
(Air)  
Remove filthy dirt in air  
Circulate air every corner of indoor  
■ Four factors of air suppliers  
The human body keeps regular temperature regarding the human body's freshness.  
For keeping freshness, heat generated from human body should emit outside of the body by air circulation, conduction,  
emission, and evaporation. The human body feels freshness when the emission rate is 40~45%, which was emitted by a  
radiation when it is comfortable and warm, and air circulation and conduction is 20~30%, and evaporation is 20~24%.  
It sometimes may depends on seasonal factor, wearing condition, age, sex and mental state other than indoor environment.  
But generally the value of fresh indoor temperature is that below 0.2(m/s) of indoor air circulation, the temperature is 21~28˚C  
when the wall temperature is the same as the indoor's and relative humidity is 30~31% in summer, the winter temperature is  
20~24˚C and relative humidity is 30~60% in winter.  
11-9  
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ELECTRONICS  
GSPN(Global Service Partner Network)  
Area  
Web Site  
North America  
Latin America  
CIS  
http://service.samsungportal.com  
http://latin.samsungportal.com  
http://cis.samsungportal.com  
http://europe.samsungportal.com  
http://china.samsungportal.com  
http://asia.samsungportal.com  
http://mea.samsungportal.com  
Europe  
China  
Asia  
Mideast & Africa  
This Service Manual is a property of Samsung Electronics Co., Ltd.  
Any unauthorized use of Manual can be punished under applicable  
International and/or domestic law.  
© Samsung Electronics Co., Ltd. Jan. 2008.  
Printed in Korea.  
Code No. DB98-29161A(3)  
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