Toshiba Air Conditioner Rav Sm562at E User Manual

FILE NO. SVM-06012  
SERVICE MANUAL  
AIR-CONDITIONER  
UNDER CEILING / CONSOLE TYPE  
RAV-SM562XT-E / RAV-SM562AT-E  
RAV-SM802XT-E / RAV-SM802AT-E  
R410A  
April, 2006  
FILE NO. SVM-06012  
1. SPECIFICATIONS  
1-1. Indoor Unit (Flexi Type)  
Indoor unit  
Model  
RAV-SM562XT-E  
RAV-SM562AT-E  
RAV-SM802XT-E  
Outdoor unit  
RAV-SM802AT-E  
(kW)  
(kW)  
5.0  
6.7  
8.0  
Cooling capacity  
5.6  
Heating capacity  
Power supply  
1 phase 230V (220-240V) 50Hz  
8.95-8.20  
1.87  
13.15-12.06  
2.72  
Running current  
(A)  
(kW)  
(%)  
Cooling  
Electrical  
characteristics  
Power consumption  
Power factor  
95  
2.67  
94  
2.46  
EER  
(W/W)  
D
E
1.5  
Energy efficiency class *  
Energy rating *  
Running current  
2.5  
Heating  
(A)  
(kW)  
(%)  
8.13-7.46  
1.70  
12.91-11.84  
2.67  
Power consumption  
Power factor  
COP  
94  
95  
3.29  
3.00  
D
(W/W)  
C
Energy efficiency class *  
Energy rating *  
Main unit  
2.5  
3.0  
Appearance  
Pure white  
Model  
-
-
Ceiling panel  
(Sold separately)  
Panel color  
Height  
Width  
(mm)  
(mm)  
(mm)  
(mm)  
(mm)  
(mm)  
(kg)  
Main unit  
Outer  
208  
208  
dimension  
1093  
1093  
633  
Depth  
633  
Ceiling panel  
Height  
Width  
-
-
-
-
(Sold separately)  
-
-
Depth  
Total weight  
Heat exchanger  
Fan unit  
Main unit  
23  
-
23  
-
Ceiling panel  
(kg)  
Finned tube  
Fan  
Standard air flow  
Centrifugal  
14.0 / 12.0 / 10.0  
50  
Centrifugal  
18.5 / 13.5 / 10.7  
50  
(m3/h)  
(W)  
H/M/L  
Motor  
Air filter  
Attached main unit  
Controller  
Attached main unit (WH-H2UE)  
Gas side  
(mm)  
(mm)  
12.7  
6.4  
15.9  
9.5  
Dimensions pipe  
Liquid side  
Drain port  
(mm)  
VP16  
Sound level  
(dB¥A)  
H/M/L  
H/M/L  
43 / 39 / 36  
58 / 54 / 51  
46 / 42 / 37  
61 / 57 / 52  
Sound power level  
(dB¥A)  
* IEC standard  
** AS standard  
– 1 –  
FILE NO. SVM-06012  
• Operation characteristic curve  
<Cooling>  
<Heating>  
14  
14  
12  
10  
12  
RAV-SM802XT-E  
RAV-SM802XT-E  
10  
8
8
6
6
RAV-SM562XT-E  
4
2
0
RAV-SM562XT-E  
Conditions  
Indoor : DB20˚C  
Outdoor : DB7˚C/WB6˚C  
Air flow : High  
Pipe length : 7.5m  
230V  
4
2
Conditions  
Indoor : DB27˚C/WB19˚C  
Outdoor : DB35˚C  
Air flow : High  
Pipe length : 7.5m  
230V  
0
0
0
15 20  
40  
60 70 80  
100  
1520  
40  
60  
80 90 100  
Compressor speed (rps)  
Compressor speed (rps)  
• Capacity variation ratio according to temperature  
<Cooling>  
<Heating>  
120  
110  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
105  
100  
95  
90  
85  
80  
75  
70  
65  
60  
Conditions  
Conditions  
Indoor : DB27˚C/WB19˚C  
Indoor : DB20˚C  
55  
Indoor air flow : High  
Pipe length : 7.5m  
Indoor air flow : High  
Pipe length : 7.5m  
50  
-14 -12 -10 -8 -6 -4 -2  
0
2
4
6
8
10  
32 33 34 35 36 37 38 39 40 41 42 43  
Outsoor temp. (˚C)  
Outsoor temp. (˚C)  
– 2 –  
FILE NO. SVM-06012  
2. CONSTRUCTION VIEWS  
2-1. Indoor Unit  
Front panel  
208  
1093  
Knock out system  
Grille air inlet  
Back body  
200 Min  
1093  
1015  
742  
For stud bolt  
Installation plate  
Mount plate  
(Ø8 – Ø10)  
For stud bolt (Ø6)  
450  
20  
20  
M10 Suspention bolt  
74  
Ø
57  
Wireless remote control  
Knock out system  
18  
UNDER CEILING & CONSOLE INSTALLATION  
3 –  
FILE NO. SVM-06012  
3. SYSTEMATIC REFRIGERATING CYCLE DIAGRAM  
3-1. RAV-SM562XT-E / RAV-SM802XT-E  
Indoor unit  
TCJ  
sensor  
Air heat exchanger  
TC sensor  
Refrigerant pipe  
at liquid side  
Outer dia. B  
Refrigerant pipe  
at gas side  
Outer dia. A  
Outer diameter of refrigerant pipe  
Model  
Gas side A  
12.7 mm  
Liquid side B  
6.4 mm  
RAV-SM  
562XT-E  
802XT-E  
Max  
30m  
15.9 mm  
9.5 mm  
Packed valve  
Packed valve  
Outer dia. B  
Outer dia. A  
Outdoor unit  
Note :  
This Service Mamual describes explanation for the Under Ceiling 1 console type indoor unit.  
For the combined outdoor unit, refer to the following Service Manual.  
Outdoor unit Model name  
RAV-SMXX0AT-E  
SVM to be referred  
A03-007  
RAV-SPXXXAT-E  
RAV-SMXX1AT-E  
RAV-SMXX2AT-E  
A03-014  
A05-001  
A05-018  
Cooling  
Heating  
4 –  
FILE NO. SVM-06012  
4. WIRING DIAGRAM  
Indoor Unit  
HEAT  
EXCHANGER  
SENSOR  
(TCJ)  
SWITCH PCB  
MCC-1428B  
CN101  
1 2 3  
FOR FLOAT SWITCH  
1 2  
1 2  
(OPTION)  
When you use float  
switch you should cut J401  
1 2 3  
1 2 3  
CN402  
1 2  
CN100  
CN05  
IC03  
CN03  
1 2  
THERMO  
SENSOR  
(TA)  
BLK  
BLK  
J401  
2 2  
1 1  
WHI  
BLU  
BLU  
BLU  
BLU  
BLU  
BLU  
BLU  
BLU  
BLU  
10 10  
10 10  
9 9  
8 8  
7 7  
6 6  
5 5  
4 4  
3 3  
2 2  
1 1  
CN13  
POWER  
DC12V  
9 9  
8 8  
7 7  
6 6  
5 5  
4 4  
3 3  
2 2  
1 1  
CN25  
BLK  
BLK  
SUPPLY  
CIRCUIT  
HEAT  
2 2  
1 1  
CN01  
4
DC5V  
EXCHANGER  
SENSOR  
(TC)  
C02  
DB01  
1
R506  
CR502  
1 1  
2 2  
3 3  
4 4  
5 5  
CN10  
CR501  
R01  
WHI  
WHI  
1 1  
2 2  
3 3  
4 4  
5 5  
6 6  
C01  
RY501  
RED  
BLK  
RED  
BLK  
BRW  
RED  
ORN  
YEL  
PNK  
BLU  
1 1  
2 2  
3 3  
4 4  
5 5  
6 6  
CN07  
5
C501  
MCC-1428A  
3 3  
2 2  
1 1  
3 3  
2 2  
1 1  
BLU  
PUR  
GRY  
BRW  
GRY  
YEL  
C15  
IC04  
R405  
CR401  
CN11  
FAN-MOTOR  
RY401  
LOUVER  
MOTOR  
100C  
R507  
R09  
3
2
1
FOR DRAIN PUMP  
(OPTION)  
R21  
CN401  
FUSE  
250VAC  
R22  
3
SG01  
F01  
T6.3A  
P04  
CN23  
CN30  
CN31  
BLK  
GRN&YEL  
INDOOR  
TERMINAL  
INDOOR  
UNIT  
2
1 2 3  
BLOCK  
OUTDOOR  
UNIT  
SIMPLE CHECK POINTS FOR DIAGNOSING FAULTS  
Color  
Identification  
BRW : BROWN  
RED : RED  
Check items  
Diagnosis result  
OPERATION Check to see if OPERATION indicator goes on and off when the main switch  
1
2
3
4
5
or breaker is turned on.  
indicator  
WHI : WHITE  
YEL : YELLOW  
BLU : BLUE  
BLK : BLACK  
GRY : GRAY  
Check the power supply voltage between 1 - 2 (Refer to the name plate.)  
Chack the fluctuate voltage between 2 - 3 (DC15 to 60V)  
Terminal  
block  
Fuse  
6.3A  
Check to see if the fuse blows out. (Check the varistor. : R22, R21)  
PNK : PINK  
ORN : ORANGE  
GRN&YEL : GREEN&  
YELLOW  
Check the voltage at the No.8 pin on CN13 connector of the infrared receiver.  
(Check the transformer and the power supply circuit of the rated voltage.)  
DC 5V  
GRN : GREEN  
PUR : PURPLE  
Check the voltage at the brown lead of the louver motor.  
(Check the transformer and the power supply circuit of the rated voltage.)  
DC 12V  
5 –  
FILE NO. SVM-06012  
5. SPECIFICATION OF ELECTRICAL PARTS  
Indoor Unit  
No.  
Parts name  
Fan motor (for indoor)  
Grille motor  
Type  
Specifications  
Output (Rated) 50 W, 220 – 240 V  
DC 12 V  
1
2
3
4
5
AFP-220-50-4A  
MP35EA  
Thermo. sensor (TA-sensor)  
550 mm  
10 kat 25°C  
Heat exchanger sensor (TC-sensor)  
Heat exchanger sensor (TCJ-sensor)  
6 mm, 500 mm  
6 mm, 500 mm  
10 kat 25°C  
10 kat 25°C  
6 –  
FILE NO. SVM-06012  
6. REFRIGERANT R410A  
This air conditioner adopts the new refrigerant HFC  
(5) After completion of installation work, check to  
(R410A) which does not damage the ozone layer.  
make sure that there is no refrigeration gas  
leakage.  
If the refrigerant gas leaks into the room, coming  
into contact with fire in the fan-driven heater,  
space heater, etc., a poisonous gas may occur.  
The working pressure of the new refrigerant R410A is  
1.6 times higher than conventional refrigerant (R22).  
The refrigerating oil is also changed in accordance  
with change of refrigerant, so be careful that water,  
dust, and existing refrigerant or refrigerating oil are not (6) When an air conditioning system charged with a  
entered in the refrigerant cycle of the air conditioner  
using the new refrigerant during installation work or  
servicing time.  
large volume of refrigerant is installed in a small  
room, it is necessary to exercise care so that,  
even when refrigerant leaks, its concentration  
does not exceed the marginal level.  
If the refrigerant gas leakage occurs and its  
concentration exceeds the marginal level, an  
oxygen starvation accident may result.  
The next section describes the precautions for air  
conditioner using the new refrigerant. Conforming to  
contents of the next section together with the general  
cautions included in this manual, perform the correct  
and safe work.  
(7) Be sure to carry out installation or removal  
according to the installation manual.  
Improper installation may cause refrigeration  
trouble, water leakage, electric shock, fire, etc.  
6-1. Safety During Installation/Servicing  
As R410A’s pressure is about 1.6 times higher than  
that of R22, improper installation/servicing may cause  
a serious trouble. By using tools and materials exclu-  
sive for R410A, it is necessary to carry out installation/  
servicing safely while taking the following precautions  
into consideration.  
(8) Unauthorized modifications to the air conditioner  
may be dangerous. If a breakdown occurs please  
call a qualified air conditioner technician or  
electrician.  
Improper repair’s may result in water leakage,  
electric shock and fire, etc.  
(1) Never use refrigerant other than R410A in an air  
conditioner which is designed to operate with  
R410A.  
6-2. Refrigerant Piping Installation  
If other refrigerant than R410A is mixed, pressure 6-2-1. Piping materials and joints used  
in the refrigeration cycle becomes abnormally  
For the refrigerant piping installation, copper pipes and  
high, and it may cause personal injury, etc. by a  
joints are mainly used. Copper pipes and joints suit-  
rupture.  
able for the refrigerant must be chosen and installed.  
(2) Confirm the used refrigerant name, and use tools  
and materials exclusive for the refrigerant R410A.  
The refrigerant name R410A is indicated on the  
visible place of the outdoor unit of the air condi-  
tioner using R410A as refrigerant. To prevent  
mischarging, the diameter of the service port  
differs from that of R22  
Furthermore, it is necessary to use clean copper pipes  
and joints whose interior surfaces are less affected by  
contaminants.  
(1) Copper pipes  
It is necessary to use seamless copper pipes  
which are made of either copper or copper alloy  
and it is desirable that the amount of residual oil is  
less than 40 mg/10 m. Do not use copper pipes  
having a collapsed, deformed or discolored  
portion (especially on the interior surface).  
Otherwise, the expansion valve or capillary tube  
may become blocked with contaminants.  
As an air conditioner using R410A incurs pressure  
higher than when using R22, it is necessary to  
choose adequate materials.  
(3) If a refrigeration gas leakage occurs during  
installation/servicing, be sure to ventilate fully.  
If the refrigerant gas comes into contact with fire,  
a poisonous gas may occur.  
(4) When installing or removing an air conditioner,  
do not allow air or moisture to remain in the  
refrigeration cycle. Otherwise, pressure in the  
refrigeration cycle may become abnormally high  
so that a rupture of personal injury may be  
caused.  
Thicknesses of copper pipes used with R410A are  
as shown in Table 6-2-1. Never use copper pipes  
thinner than 0.8 mm even when it is available on  
the market.  
7 –  
FILE NO. SVM-06012  
Table 6-2-1 Thicknesses of annealed copper pipes  
Thickness (mm)  
Nominal diameter  
Outer diameter (mm)  
R410A  
0.80  
R22  
0.80  
0.80  
0.80  
1.00  
1/4  
3/8  
1/2  
5/8  
6.35  
9.52  
0.80  
12.70  
15.88  
0.80  
1.00  
(2) Joints  
b) Socket joints  
For copper pipes, flare joints or socket joints are  
used. Prior to use, be sure to remove all  
contaminants.  
Socket joints are such that they are brazed for  
connections, and used mainly for thick pipings  
whose diameter is larger than 20 mm.  
Thicknesses of socket joints are as shown in  
Table 6-2-2.  
a) Flare joints  
Flare joints used to connect the copper pipes  
cannot be used for pipings whose outer  
diameter exceeds 20 mm. In such a case,  
socket joints can be used.  
Sizes of flare pipe ends, flare joint ends and  
flare nuts are as shown in Tables 6-2-3 to 6-2-6  
below.  
Table 6-2-2 Minimum thicknesses of socket joints  
Reference outer diameter of  
Minimum joint thickness  
(mm)  
Nominal diameter  
copper pipe jointed (mm)  
1/4  
3/8  
1/2  
5/8  
6.35  
9.52  
0.50  
0.60  
0.70  
0.80  
12.70  
15.88  
6-2-1. Processing of piping materials  
d) Flare processing  
Make certain that a clamp bar and copper pipe  
have been cleaned.  
By means of the clamp bar, perform the flare  
processing correctly.  
Use either a flare tool for R410A or conven-  
tional flare tool.  
Flare processing dimensions differ according to  
the type of flare tool. When using a conven-  
tional flare tool, be sure to secure “dimension A”  
by using a gauge for size adjustment.  
When performing the refrigerant piping installation,  
care should be taken to ensure that water or dust does  
not enter the pipe interior, that no other oil other than  
lubricating oils used in the installed air conditioner is  
used, and that refrigerant does not leak. When using  
lubricating oils in the piping processing, use such  
lubricating oils whose water content has been removed.  
When stored, be sure to seal the container with an  
airtight cap or any other cover.  
(1) Flare Processing procedures and precautions  
a) Cutting the pipe  
D  
A
By means of a pipe cutter, slowly cut the pipe  
so that it is not deformed.  
b) Removing burrs and chips  
If the flared section has chips or burrs,  
refrigerant leakage may occur. Carefully  
remove all burrs and clean the cut surface  
before installation.  
Fig. 6-2-1 Flare processing dimensions  
c) Insertion of flare nut  
8 –  
FILE NO. SVM-06012  
Table 6-2-3 Dimensions related to flare processing for R410A  
A (mm)  
Conventional flare tool  
Outer  
diameter  
(mm)  
Nominal  
diameter  
Thickness  
(mm)  
Flare tool for R410A  
clutch type  
Clutch type  
1.0 to 1.5  
1.0 to 1.5  
1.0 to 1.5  
1.0 to 1.5  
Wing nut type  
1.5 to 2.0  
1/4  
3/8  
1/2  
5/8  
6.35  
9.52  
0.8  
0.8  
0.8  
1.0  
0 to 0.5  
0 to 0.5  
0 to 0.5  
0 to 0.5  
1.5 to 2.0  
12.70  
15.88  
2.0 to 2.5  
2.0 to 2.5  
Table 6-2-4 Dimensions related to flare processing for R22  
A (mm)  
Outer  
diameter  
(mm)  
Nominal  
diameter  
Thickness  
(mm)  
Conventional flare tool  
Flare tool for R22  
clutch type  
Clutch type  
0.5 to 1.0  
0.5 to 1.0  
0.5 to 1.0  
0.5 to 1.0  
Wing nut type  
1.0 to 1.5  
1/4  
3/8  
1/2  
5/8  
6.35  
9.52  
0.8  
0.8  
0.8  
1.0  
0 to 0.5  
0 to 0.5  
0 to 0.5  
0 to 0.5  
1.0 to 1.5  
12.70  
15.88  
1.5 to 2.0  
1.5 to 2.0  
Table 6-2-5 Flare and flare nut dimensions for R410A  
Outer  
diameter  
(mm)  
Flare nut  
width  
(mm)  
Dimension (mm)  
Thickness  
Nominal  
diameter  
(mm)  
A
B
C
D
1/4  
3/8  
1/2  
5/8  
6.35  
9.52  
0.8  
0.8  
0.8  
1.0  
9.1  
9.2  
6.5  
13  
20  
23  
25  
17  
22  
26  
29  
13.2  
16.6  
19.7  
13.5  
16.0  
19.0  
9.7  
12.70  
15.88  
12.9  
16.0  
Table 6-2-6 Flare and flare nut dimensions for R22  
Outer  
diameter  
(mm)  
Flare nut  
width  
(mm)  
Dimension (mm)  
Thickness  
Nominal  
diameter  
(mm)  
A
B
C
D
1/4  
3/8  
1/2  
5/8  
3/4  
6.35  
9.52  
0.8  
0.8  
0.8  
1.0  
1.0  
9.0  
9.2  
6.5  
13  
20  
20  
23  
34  
17  
22  
24  
27  
36  
13.0  
16.2  
19.4  
23.3  
13.5  
16.0  
19.0  
24.0  
9.7  
12.70  
15.88  
19.05  
12.9  
16.0  
19.2  
9 –  
FILE NO. SVM-06012  
°
to 46  
°
45  
43  
°
to 45  
°
Fig. 6-2-2 Relations between flare nut and flare seal surface  
(2) Flare connecting procedures and precautions  
When it is strong, the flare nut may crack and  
may be made non-removable. When choosing  
the tightening torque, comply with values  
designated by manufacturers. Table 6-2-7  
shows reference values.  
a) Make sure that the flare and union portions do  
not have any scar or dust, etc.  
b) Correctly align the processed flare surface with  
the union axis.  
Note:  
c) Tighten the flare with designated torque by  
means of a torque wrench. The tightening  
torque for R410A is the same as that for  
conventional R22. Incidentally, when the torque  
is weak, the gas leakage may occur.  
When applying oil to the flare surface, be sure to use  
oil designated by the manufacturer. If any other oil is  
used, the lubricating oils may deteriorate and cause  
the compressor to burn out.  
Table 6-2-7 Tightening torque of flare for R410A [Reference values]  
Tightening torque of torque  
wrenches available on the market  
N·m (kgf·m)  
Nominal  
diameter  
Outer diameter  
(mm)  
Tightening torque  
N·m (kgf·cm)  
1/4  
3/8  
1/2  
5/8  
6.35  
9.52  
14 to 18 (140 to 180)  
33 to 42 (330 to 420)  
50 to 62 (500 to 620)  
63 to 77 (630 to 770)  
16 (160), 18 (180)  
42 (420)  
12.70  
15.88  
55 (550)  
65 (650)  
10 –  
FILE NO. SVM-06012  
6-3.Tools  
6-3-1. Required tools  
The service port diameter of packed valve of the outdoor unit in the air conditioner using R410A is changed to  
prevent mixing of other refrigerant. To reinforce the pressure-resisting strength, flare processing dimensions and  
opposite side dimension of flare nut (For 12.70 copper pipe) of the refrigerant piping are lengthened.  
The used refrigerating oil is changed, and mixing of oil may cause a trouble such as generation of sludge,  
clogging of capillary, etc. Accordingly, the tools to be used are classified into the following three types.  
(1) Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22))  
(2) Tools exclusive for R410A, but can be also used for conventional refrigerant (R22)  
(3) Tools commonly used for R410A and for conventional refrigerant (R22)  
The table below shows the tools exclusive for R410A and their interchangeability.  
Tools exclusive for R410A (The following tools for R410A are required.)  
Tools whose specifications are changed for R410A and their interchangeability  
R410A air conditioner  
installation  
Conventional air  
conditioner installation  
No.  
Used tool  
Usage  
Existence of  
new equipment conventional  
Whether  
Whether new equipment  
can be used with  
for R410A  
equipment can  
be used  
conventional refrigerant  
1
2
Flare tool  
Copper pipe gauge  
Pipe flaring  
Flaring by  
Yes  
*(Note 1)  
for adjusting projection conventional flare  
Yes  
*(Note 1)  
*(Note 1)  
margin  
tool  
Connection of  
flare nut  
3
4
Torque wrench  
Yes  
Yes  
Evacuating,  
refrigerant charge,  
run check, etc.  
Gauge manifold  
Charge hose  
5
6
Vacuum pump adapter Vacuum evacuating  
Yes  
Yes  
Electronic balance for  
Refrigerant charge  
refrigerant charging  
7
8
9
!
Refrigerant cylinder  
Leakage detector  
Charging cylinder  
Refrigerant charge  
Gas leakage check  
Refrigerant charge  
Yes  
Yes  
(Note 2)  
(Note 1) When flaring is carried out for R410A using the conventional flare tools, adjustment of projection  
margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.  
(Note 2) Charging cylinder for R410A is being currently developed.  
General tools (Conventional tools can be used.)  
In addition to the above exclusive tools, the following equipments which serve also for R22 are necessary as  
the general tools.  
(1) Vacuum pump  
(4) Reamer  
(5) Pipe bender  
(9) Hole core drill (65)  
(10) Hexagon wrench  
(Opposite side 4 mm)  
(11) Tape measure  
(12) Metal saw  
Use vacuum pump by  
attaching vacuum pump adapter. (6) Level vial  
(2) Torque wrench  
(3) Pipe cutter  
(7) Screwdriver (+, )  
(8) Spanner of Monkey wrench  
Also prepare the following equipments for other installation method and run check.  
(1) Clamp meter  
(2) Thermometer  
(3) Insulation resistance tester  
(4) Electroscope  
11 –  
FILE NO. SVM-06012  
6-4. Recharging of Refrigerant  
When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the  
following steps.  
Recover the refrigerant, and check no refrigerant  
remains in the equipment.  
When the compound gauges pointer has indi-  
cated -0.1 Mpa (-76 cmHg), place the handle Low  
in the fully closed position, and turn off the  
Connect the charge hose to packed valve service  
port at the outdoor units gas side.  
vacuum pumps power switch.  
Keep the status as it is for 1 to 2 minutes, and  
ensure that the compound gauges pointer does  
not return.  
Connect the charge hose of the vacuum pump  
adapter.  
Open fully both packed valves at liquid and gas  
Set the refrigerant cylinder to the electronic  
sides.  
balance, connect the connecting hose to the  
cylinder and the connecting port of the electronic  
balance, and charge liquid refrigerant.  
Place the handle of the gauge manifold Low in  
the fully opened position, and turn on the vacuum  
pumps power switch. Then, evacuating the  
refrigerant in the cycle.  
(For refrigerant charging, see the figure below.)  
1 Never charge refrigerant exceeding the specified amount.  
2 If the specified amount of refrigerant cannot be charged, charge refrigerant bit by bit in COOL mode.  
3 Do not carry out additional charging.  
When additional charging is carried out if refrigerant leaks, the refrigerant composition changes in the  
refrigeration cycle, that is characteristics of the air conditioner changes, refrigerant exceeding the  
specified amount is charged, and working pressure in the refrigeration cycle becomes abnormally high  
pressure, and may cause a rupture or personal injury.  
(Liquid side)  
(INDOOR unit)  
(OUTDOOR unit)  
Opened  
Closed  
(Gas side)  
Refrigerant cylinder  
(With siphon pipe)  
Check valve  
Open/Close valve  
for charging  
Service port  
Electronic balance for refrigerant charging  
Fig. 6-4-1 Configuration of refrigerant charging  
12 –  
FILE NO. SVM-06012  
1 Be sure to make setting so that liquid can be charged.  
2 When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down.  
It is necessary for charging refrigerant under condition of liquid because R410A is mixed type of refrigerant.  
Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning the  
cylinder upside down if cylinder is not equipped with siphon.  
[Cylinder with siphon]  
[Cylinder without siphon]  
Gauge manifold  
Gauge manifold  
OUTDOOR unit  
OUTDOOR unit  
c y l i n d e r  
R e f r i g e r a n t  
Refrigerant  
cylinder  
Electronic  
balance  
Electronic  
balance  
Siphon  
R410A refrigerant is HFC mixed refrigerant.  
Therefore, if it is charged with gas, the composition  
of the charged refrigerant changes and the  
characteristics of the equipment varies.  
Fig. 6-4-2  
6-5. Brazing of Pipes  
1 Phosphor bronze brazing filler tends to react  
with sulfur and produce a fragile compound  
water solution, which may cause a gas leakage.  
Therefore, use any other type of brazing filler at  
a hot spring resort, etc., and coat the surface  
with a paint.  
6-5-1. Materials for brazing  
(1) Silver brazing filler  
Silver brazing filler is an alloy mainly composed of  
silver and copper. It is used to join iron, copper or  
copper alloy, and is relatively expensive though it  
excels in solderability.  
2 When performing brazing again at time of  
servicing, use the same type of brazing filler.  
(2) Phosphor bronze brazing filler  
Phosphor bronze brazing filler is generally used to  
join copper or copper alloy.  
6-5-2. Flux  
(1) Reason why flux is necessary  
By removing the oxide film and any foreign  
matter on the metal surface, it assists the flow of  
brazing filler.  
(3) Low temperature brazing filler  
Low temperature brazing filler is generally called  
solder, and is an alloy of tin and lead. Since it is  
weak in adhesive strength, do not use it for  
refrigerant pipes.  
In the brazing process, it prevents the metal  
surface from being oxidized.  
By reducing the brazing fillers surface tension,  
the brazing filler adheres better to the treated  
metal.  
13 –  
FILE NO. SVM-06012  
(2) Characteristics required for flux  
Activated temperature of flux coincides with the  
brazing temperature.  
6-5-3. Brazing  
As brazing work requires sophisticated techniques,  
experiences based upon a theoretical knowledge, it  
must be performed by a person qualified.  
In order to prevent the oxide film from occurring in the  
pipe interior during brazing, it is effective to proceed  
with brazing while letting dry Nitrogen gas (N2) flow.  
Due to a wide effective temperature range, flux  
is hard to carbonize.  
It is easy to remove slag after brazing.  
The corrosive action to the treated metal and  
brazing filler is minimum.  
It excels in coating performance and is harmless  
to the human body.  
Never use gas other than Nitrogen gas.  
(1) Brazing method to prevent oxidation  
1 Attach a reducing valve and a flow-meter to the  
Nitrogen gas cylinder.  
As the flux works in a complicated manner as  
described above, it is necessary to select an  
adequate type of flux according to the type and  
shape of treated metal, type of brazing filler and  
brazing method, etc.  
2 Use a copper pipe to direct the piping material,  
and attach a flow-meter to the cylinder.  
3 Apply a seal into the clearance between the  
piping material and inserted copper pipe for  
Nitrogen in order to prevent backflow of the  
Nitrogen gas.  
(3) Types of flux  
Noncorrosive flux  
Generally, it is a compound of borax and boric  
acid.  
It is effective in case where the brazing  
temperature is higher than 800°C.  
4 When the Nitrogen gas is flowing, be sure to  
keep the piping end open.  
5 Adjust the flow rate of Nitrogen gas so that it is  
lower than 0.05 m3/Hr or 0.02 Mpa (0.2 kgf/  
cm2) by means of the reducing valve.  
6 After performing the steps above, keep the  
Nitrogen gas flowing until the pipe cools down  
to a certain extent (temperature at which pipes  
are touchable with hands).  
Activated flux  
Most of fluxes generally used for silver brazing  
are this type.  
It features an increased oxide film removing  
capability due to the addition of compounds  
such as potassium fluoride, potassium chloride  
and sodium fluoride to the borax-boric acid  
compound.  
7 Remove the flux completely after brazing.  
(4) Piping materials for brazing and used brazing  
filler/flux  
M
Flow meter  
Piping  
material  
Used brazing  
filler  
Used  
flux  
Stop valve  
Copper - Copper Phosphor copper  
Do not use  
Paste flux  
Vapor flux  
Nitrogen gas  
cylinder  
Copper - Iron  
Iron - Iron  
Silver  
Silver  
From Nitrogen cylinder  
1 Do not enter flux into the refrigeration cycle.  
2 When chlorine contained in the flux remains  
within the pipe, the lubricating oil deteriorates.  
Therefore, use a flux which does not contain  
chloring.  
3 When adding water to the flux, use water which  
does not contain chlorine (e.g. distilled water or  
ion-exchange water).  
Pipe  
Nitrogen  
gas  
Rubber plug  
Fig. 6-5-1 Prevention of oxidation during brazing  
4 Remove the flux after brazing.  
14 –  
FILE NO. SVM-06012  
7. CONTROL BLOCK DIAGRAM  
Indoor Unit Control Panel  
M.C.U.  
8 MHz  
Heat Exchanger Sensor (TCJ)  
Heat Exchanger Sensor (TC)  
Temperature Sensor  
Hi POWER  
Display  
Functions  
Louver Control  
FILTER Sign  
Display  
3-minute Delay at Restart for Compressor  
Motor Revolution Control  
PRE DEF.  
Sign Display  
Infrared Rays Signal Receiver  
Processing  
(Temperature Processing)  
TIMER  
Display  
Initiallizing Circuit  
Infrared  
Timer  
Rays  
OPERATION  
Display  
Clock Frequence  
Oscillator Circuit  
36.7 kHz  
Drain Pump ON/OFF  
Serial Signal Communication  
Indoor Fan  
Motor  
Power Supply  
Circuit  
Louver ON/OFF Signal  
Louver Driver  
Remote  
Control  
Louver Motor  
Serial Signal  
Transmitter/  
Receiver  
Noise Filter  
Relay  
RY401  
Float  
Switch  
Drain  
Pump  
From Outdoor Unit  
Serial Signal Communication  
REMOTE CONTROL  
Infrared Rays  
Remote Control  
Operation (START/STOP)  
Operation Mode Selection  
AUTO, COOL, DRY, HEAT, FAN ONLY  
Temperature Setting  
Fan Speed Selection  
ON TIMER Setting  
OFF TIMER Setting  
Louver Auto Swing  
Louver Direction Setting  
ECO  
Hi power  
Filter Reset  
15 –  
FILE NO. SVM-06012  
8. OPERATION DESCRIPTION  
8-1. When power supply is reset  
8-3. Air volume control  
(1) Distinction of outdoor units  
(1) Operation with [HIGH (H)], [MED (M)], [LOW (L)],  
or [AUTO] mode is performed by the command  
from the remote control.  
When the power supply is reset, the outdoors are  
distinguished, and control is exchanged according  
to the distinguished result.  
(2) When [FAN] button is set to AUTO, the indoor fan  
motor operates as shown in Fig. 8-3-1, Fig. 8-3-2  
and Table 8-3-1.  
(2) Setting of the indoor fan speed  
Based on EEPROM data, rspeed of the indoor fan  
is selected.  
<COOL>  
Remarks: Air speed  
°C  
8-2. Operation mode selection  
+3  
M+  
(1) Based on the operation mode selecting command  
from the remote control, the operation mode is  
selected.  
+2.5  
*1  
+2  
*1  
+1.5  
Table 8-2-1  
*1  
+1  
Remote control  
Outline of control  
command  
+0.5  
Preset  
temp.  
0
STOP  
FAN  
Air conditioner stops.  
Fan operation  
0.5  
COOL  
DRY  
Cooling operation  
Dry operation  
NOTE :  
*1: The values marked with *1 are calculated and  
controlled by the difference in motor speed  
between M+ and L–.  
HEAT  
AUTO  
Heating operation  
Automatic operation  
Fig. 8-3-1  
(2) Automatic Operation  
The air conditioner selects and operates in one  
of the operating modes of cooling, heating or  
fan only, depending on the room temperature.  
If the AUTO mode is uncomfortable, you can  
select the desired conditions manually.  
Table 8-2-2  
Room temperature in operation  
Operating condition  
Cooling  
Performs the cooling operation at a temperature 1°C  
The set temperature +1°C or higher  
operation  
higher than the setting.  
(in case that the room is hot)  
Fan only  
operation  
Performs the fan only operation (low speed) while  
monitoring the room temperature. When the room  
temperature changes, the air conditioner will select the  
cooling or heating mode.  
The set temperature 1°C to +1°C  
Heating  
Performs the heating operation at a temperature 1°C  
The set temperature 1°C or lower  
operation  
lower than the setting.  
(in case that the room is cold)  
16 –  
FILE NO. SVM-06012  
<HEAT>  
8-4. Cool air discharge preventive control  
In heating operation, the indoor heat exchanger  
restricts revolving speed of the fan motor to prevent a  
cold draft. The upper limit of the revolving speed is  
shown in Fig. 8-4-1 and Table 8-4-1.  
°C  
0
Preset  
temp.  
L
0.5  
1  
1.5  
2  
*1  
*2  
Manual  
(One of  
5 steps)  
+
M
AUTO  
*4  
46  
45  
34  
33  
5.0  
5.5  
LH  
H
33  
32  
21  
20  
[FAN AUTO]  
(Up to  
setting  
speed)  
SUL*3  
NOTE :  
*2 A+4 A+4  
SUL*1  
Stop  
*1, *2 : The values marked with *1 and *2 are  
calculated and controlled by the difference in  
motor speed between M+ and L.  
A8 A8  
*6  
*5  
Fig. 8-3-2  
NOTES :  
*1: The fan stops for 2 minutes after thermostat-OFF.  
Table 8-3-1  
*2: A is 24°C when the preset temperature is 24°C or  
more and A is the preset temperature when it is  
under 24°C.  
RAV-SM562XT-E  
RAV-SM802XT-E  
MODEL  
Cooling  
Motor speed Air flow level Motor speed Air flow level  
(rpm)  
1060  
950  
(m3/h)  
800  
690  
580  
830  
730  
600  
(rpm)  
1190  
1010  
850  
(m3/h)  
900  
750  
650  
980  
800  
650  
HIGH  
MED  
LOW  
HIGH  
MED  
LOW  
*3: SUL means Super Ultra Low.  
and  
*4: Calculated from difference in motor speed  
between SUL and HIGH.  
Fan only  
800  
1120  
970  
1300  
1070  
860  
Heating  
Fig. 8-4-1 Cold draft preventing control  
820  
*5 and *6:  
LOW+MED  
2
LOW+ =  
MED+ =  
Table 8-4-1  
MED+HIGH  
2
Fan  
speed  
*5  
*6  
Starting period  
Stabilized period  
AUTO  
Up until 12 minutes  
passed after starting  
the unit  
From 12 to 25 minutes  
passed after starting  
the unit and room  
temperature is 3°C  
lower than preset  
temperature  
From 12 to 25 minutes  
passed after starting  
the unit and room  
temperature is  
between preset  
temperature and 3°C  
lower than preset  
temperature  
25 minutes or more  
passed after starting  
the unit  
Manual Room temperature  
(L H) < Preset temperature  
4°C  
Room temperature  
Preset temperature  
3.5°C  
17 –  
FILE NO. SVM-06012  
8-5. Freeze preventive control (Low  
temperature release)  
8-7. Louver control  
(1) Vertical air flow louver  
Position of veritcal air flow louver is automatically  
controlled according to the operation mode.  
Besides, position of vertical air flow louver can be  
arbitrarily set by pressing [FIX] button.  
The louver position which is set by [FIX] button is  
stored in the microcomputer, and the louver is  
automatically set at the stored position for the next  
operation.  
The cooling operation (including Dry operation) is  
performed as follows based on the detected  
temperature of Tc sensor or Tcj sensor.  
When [J] zone is detected for T1 minutes (Following  
figure), the commanded frequency is decreased from  
the real operation frequency. After then the  
commanded frequency changes every 2 minutes while  
operation is performed in [J] zone.  
(2) Swing  
T1  
If [SWING] button is pressed when the indoor unit  
is in operation, the vertical air flow louver starts  
swinging. When [SWING] button is pressed, it  
stops swinging.  
Normal  
1 minute  
In [K] zone, time counting is interrupted and the  
operation is held.  
8-8. Filter sign display  
When [I] zone is detected, the timer is cleared and the  
operation returns to the normal operation.  
(1) The operation time of the indoor fan is calculated,  
the filter lamp (Orange) on the display part of the  
main unit goes on when the specified time (240H)  
has passed. When a wired remote controller is  
connected, the filter reset signal is sent to the  
remote controller, and also it is displayed on LCD  
of the wired remote control.  
(°C)  
7
6
5
A
I
K
J
(2) When the filter reset signal has been received  
from the wired remote control after [FILTER] lamp  
has gone on or when the filter check button  
(Temporary button) is pushed, time of the  
calculation timer is cleared. In this case, the  
measurement time is reset if the specified time  
has passed, and display on LCD and the display  
on the main unit disappear.  
Fig. 8-5-1  
In heating operation, the freeze-preventive control  
works if 4-way valve is not exchanged and the  
condition is satisfied.  
Remarks:  
Remarks:  
[FILTER] goes on  
Tcj : Indoor heat exchanger sensor temperature  
8-6. High-temp release control  
The heating operation is performed as follows based  
on the detected temperature of Tc sensor.  
When [M] zone is detected, the commanded  
frequency is decreased from the real operation  
frequency. After then the commanded frequency  
changes every 30 seconds while operation is  
performed in [M] zone.  
In [N] zone, the commanded frequency is held.  
When [L] zone is detected, the commanded  
frequency is returned to the original value by  
approx. 6Hz every 60 seconds.  
Tc (°C)  
55 A  
M
N
52  
48 B  
L
Fig. 8-6-1  
18 –  
FILE NO. SVM-06012  
8-9-1. How to set auto restart function  
8-9. Auto Restart Function  
To set the auto restart function, proceed as follows:  
The power supply to the unit must be on; the function  
will not set if the power is off.  
Push the [TEMPORARY] button located in the center  
of the front panel continuously for three seconds.  
The unit receives the signal and beeps three times.  
The unit then restarts operating automatically in the  
event of power supply being accidentally shut down.  
The indoor unit is equipped with an automatic  
restarting function which allows the unit to restart  
operating with the set operating conditions in the event  
of power supply being accidentally shut down. The  
operation will resume without warning three minutes  
after power is restored.  
This function is not set to work when shipped from the  
factory. Therefore it is necessary to set it to work.  
When the unit is on standby (Not operating)  
Operation  
Motions  
Push [TEMPORARY] button for more  
than three seconds.  
The unit is on standby.  
The unit starts to operate.  
The green lamp is on.  
After approx. three seconds,  
0
The unit beeps three times  
and continues to operate.  
The lamp changes from  
green to orange.  
3S  
Hi POWER FILTER  
PRE.D  
TEMPORARY  
button  
If the unit is not required to operate at this time, push [TEMPORARY]  
button once more or use the remote control to turn it off.  
When the unit is in operation  
Operation  
Motions  
Push [TEMPORARY] button for more  
than three seconds.  
The unit is in operation.  
The unit stops operating.  
The green lamp is on.  
The green lamp is turned off.  
After approx. three seconds,  
The unit beeps three times.  
0
3S  
Hi POWER FILTER  
PRE.D  
TEMPORARY  
button  
If the unit is required to operate at this time, push [TEMPORARY]  
button once more or use the remote control to turn it on.  
While this function is being set, if the unit is in  
operation, the orange lamp is on.  
This function can not be set if the timer operation  
has been selected.  
When the unit is turned on by this function, the  
louver will not swing even though it was swinging  
automatically before shutting down.  
While the filter check lamp is on, the  
TEMPORARY button has the function of filter  
reset button.  
19 –  
FILE NO. SVM-06012  
8-9-2. How to cancel auto restart function  
To cancel auto restart function, proceed as follows:  
Repeat the setting prodedure: the unit receives the  
signal and beeps three times.  
The unit will be required to be turned on with the  
remote control after the main power supply is turned  
off.  
When the unit is on standby (Not operating)  
Operation  
Motions  
Push [TEMPORARY] button for more  
than three seconds.  
The unit is on standby.  
The unit starts to operate.  
The orange lamp is on.  
After approx. three seconds,  
0
The unit beeps three times  
and continues to operate.  
The lamp changes from  
orange to green.  
3S  
Hi POWER FILTER  
PRE.D  
TEMPORARY  
button  
If the unit is not required to operate at this time, push [TEMPORARY]  
button once more or use the remote control to turn it off.  
When the unit is in operation  
Operation  
Motions  
Push [TEMPORARY] button for more  
than three seconds.  
The unit is in operation.  
The unit stops operating.  
The orange lamp is on.  
The orange lamp is turned off.  
After approx. three seconds,  
The unit beeps three times.  
0
3S  
Hi POWER FILTER  
PRE.D  
TEMPORARY  
button  
If the unit is required to operate at this time, push [TEMPORARY]  
button once more or use the remote control to turn it on.  
While this function is being set, if the unit is in  
operation, the orange lamp is on.  
8-10. Filter Check Lamp  
When the elapsed time reaches 1000 hours, the filter  
check lamp indicates. After cleaning the filters, turn off  
the filter check lamp.  
8-9-3. Power failure during timer operation  
When the unit is in Timer operation, if it is turned off  
because of power failure, the timer operation is  
cancelled. Therefore, set the timer operation again.  
8-10-1. How to turn off filter check lamp  
(1) Press [FILTER] button on the remote control.  
(2) Push [TEMPORARY] button on the indoor unit.  
Note:  
If [TEMPORARY] button is pushed while the filter  
check lamp is not indicating, the indoor unit will start  
the Automatic Operation.  
20 –  
FILE NO. SVM-06012  
9.TROUBLESHOOTING  
9-1-2. Troubleshooting procedure  
9-1. Summary of Troubleshooting  
When a trouble occurred, check the parts along with  
the following procedure.  
9-1-1. Before troubleshooting  
(1) Required tools/instruments  
e and d screwdrivers, spanners, radio  
cutting pliers, nippers, etc.  
Trouble  
Confirmation of check code by service mode  
Tester, thermometer, pressure gauge, etc.  
(2) Confirmation points before check  
1 The following operations are normal.  
a) Compressor does not operate.  
Is not 3-minutes delay (3 minutes after  
compressor OFF)?  
Check defective position and parts.  
NOTE :  
For cause of a trouble, power conditions or malfunc-  
tion/erroneous diagnosis of microcomputer due to  
outer noise is considered except the items to be  
checked. If there is any noise source, change the  
cables of the signal line to shield cables.  
Does not thermostat turn off?  
Does not timer operate during fan  
operation?  
Is not outside high-temperature operation  
controlled in heating operation?  
b) Indoor fan does not rotate.  
Does not cool air discharge preventive  
control work in heating operation?  
c) Outdoor fan does not rotate or air volume  
changes.  
9-1-3. Outline of Judgment  
A primary judgment to detect cause of error exists on  
the indoor unit or outdoor unit is performed in the  
following procedure.  
<Judgment by flashing display on the indoor  
unit display part>  
Does not high-temperature release opera-  
tion control work in heating operation?  
Does not outside low-temperature opera-  
tion control work in cooling operation?  
Is not defrost operation performed?  
d) ON/OFF operation cannot be performed from  
remote control.  
The indoor unit monitors operating status of the air  
conditioner, and if a protective circuit works, contents  
of the self-diagnosis are displayed with a block  
restricted to the following cases on the indoor unit  
display part (Sensor).  
Is not forced operation performed?  
Is not the control operation performed from  
outside/remote side?  
2 Did you return the cabling to the initial  
positions?  
3 Are connecting cables between indoor unit and  
receiving unit correct?  
Table 9-1-1  
Remote  
control code  
Block display  
Contents of self-diagnosis  
Check code  
––  
00  
01  
02  
03  
––  
Operation lamp display flashes. (1Hz)  
Operation lamp display flashes. (5Hz)  
Operation/timer lamp displays flash. (5Hz)  
Operation/defrost lamp displays flash. (5Hz)  
Operation/timer/defrost lamp displays flash. (5Hz)  
––  
Power failure (In power ON)  
Indoor P.C. board  
––  
0b to 0F, 11, 12, b5, b6  
04  
Inter-unit cables/transmission system  
Outdoor P.C. board  
Cycle system, etc.  
14 to 19, 1A, 1C  
1d, 1E, 1F, 21  
1b, 8b  
––  
21 –  
FILE NO. SVM-06012  
9-2. Self-Diagnosis by Remote Control  
(Check Code)  
(1) If the lamps are indicated as shown 00 to 03 in  
Table 9-1-1, exchanger the self-diagnosis by the  
remote control.  
(2) When the remote control is set to the service  
mode, the indoor controller diagnoses the  
operation condition and indicate the information of  
the self-diagnosis on the display of the remote  
control with the check codes. If a fault is detected,  
all lamps on the indoor unit will blink at 5 Hz and it  
will beep for 10 seconds (Pi, Pi, Pi....). The timer  
lamp usually blinks (5 Hz) during the self-diagnosis.  
9-2-1. How to use remote control in service mode  
(1) Press [CHECK] button with a tip of pencil to set the  
remote control to the service mode.  
“00” is indicated on the display of the remote  
control.  
SET  
CLR  
RESET CLOCK CHECK  
The timer lamp on the indoor unit blinks  
continuously. (5 times per 1 sec.)  
(2) Press [TIMER 8] button.  
If there is no fault with a code, the indoor unit will  
beep once (Pi) and the display of the remote  
control will change as follows:  
AUTOA  
00  
01  
02 1d  
1E  
22  
Check the unit with all 35 check codes (00 to 22).  
as shown in Table 9-2-1.  
PRESET  
Press [TIMER 9] button to change the check  
code backwards.  
START/STOP  
AUTO  
FAN  
SWING  
FIX  
MODE  
If there is a fault, the indoor unit will beep for 10  
seconds (Pi, Pi, Pi...).  
ECO  
Hi-POWER  
TIMER  
Note the check code on the display of the remote  
control.  
MEMO  
ON  
OFF  
SET  
CLR  
2-digits alphanumeric will be indicated on the  
display.  
FILTER  
RESET CLOCK CHECK  
All lamps on the indoor unit will blink. (5 times  
per 1 sec.)  
(3) Press [CLR] button. After service finish for clear  
service code in memory.  
“7F” is indicated on the display of the remote  
control.  
Alphanumeric characters are used for the check code.  
(4) Press [START/STOP] button to release the service  
mode.  
is 5.  
is A.  
is C.  
is 6.  
is B.  
is D.  
The display of the remote control returns to as it  
was before service mode was engaged.  
22 –  
FILE NO. SVM-06012  
Table 9-2-1  
Operation of diagnostic function  
Judgement and action  
Check  
code  
Check  
code  
Unit  
status  
Block  
Symptom  
Condition  
Indoor  
P.C. board  
The indoor thermo sensor (TA) is  
defective.  
Disconnection or short-circuit  
Operation  
continues.  
The lamp on the  
indoor unit blinks  
when error is  
defected.  
1. Check the indoor thermo sensor (TA).  
2. Check the indoor P.C. board.  
The indoor heat exchanger  
sensor (TC) is defective.  
Disconnection or short-circuit  
Operation  
continues.  
The lamp on the  
indoor unit blinks  
when error is  
defected.  
1. Check the indoor heat exchanger  
sensor (TC).  
2. Check the indoor P.C. board.  
The indoor fan motor or its circuit  
is defective.  
All off  
The lamp on the  
indoor unit blinks  
when error is  
defected.  
1. Check the connector circuit of the  
indoor fan motor (CN10).  
2. Check the indoor fan motor.  
3. Check the indoor P.C. board.  
The part other than the above  
parts on the indoor P.C. board is  
defective.  
Operation  
continues.  
The lamp on the  
indoor unit blinks  
when error is  
defected.  
1. Check the indoor P.C. board.  
(EEPROM and peripheral circuits)  
EEPROM access error  
IOL operation  
All off  
The lamp on the  
indoor unit blinks  
when error is  
defected.  
Overload operation of refrigerating cycle  
The block is  
unidentifi-  
able  
The variation of TC, 5 minutes  
after starting the compressor,  
is 2K or less.  
Operation  
continues.  
The lamp on the  
indoor unit blinks  
when error is  
defected.  
1. Check whether or not the TC sensor  
comes off.  
2. Check whether or not it is possible to  
operate the compressor and the  
outdoor fan motor.  
3. Check gas leak.  
The serial signals can not be  
Operation  
The lamp on the  
indoor unit blinks  
when error is  
defected.  
1. In the case of the outdoor unit not  
operating at all;  
Check the crossover cable and  
connect it properly.  
Check the outdoor P.C. board.  
2. In the case of the outdoor unit operating  
normally;  
Check whether or not both of serial  
LED (Green) and serial LED (Orange)  
is blinking.  
Cable  
connection  
transmitted and received between continues.  
indoor and outdoor units.  
The crossover wire is  
connected wrongly.  
The serial signal transmitting  
circuit on the outdoor P.C. board  
is defective.  
The serial signal receiving  
circuit on the indoor P.C. board  
is defective.  
If the serial LED (Green) is not  
blinking, check the outdoor P.C. board.  
If the serial LED (Orange) is not  
blinking, check the indoor P.C. board.  
The operation command signals  
are not transmitted from the  
indoor unit to the outdoor unit.  
Operation  
continues.  
The lamp on the  
indoor unit blinks  
when error is  
If the operation command signals continue  
to be transmitted between 2 and 3 of the  
indoor terminal block, replace the outdoor  
P.C. board.  
defected. And it  
returns to the  
normal condition  
when recovering  
from errors.  
Outdoor  
P.C. board  
The outdoor thermo sensor (TE)  
is defective.  
Disconnection or short-circuit  
All off  
The lamp on the  
indoor unit blinks  
when error is  
defected.  
1. Check the outdoor thermo sensor (TE).  
2. Check the outdoor P.C. board.  
The outdoor heat exchanger (TD) All off  
sensor is defective.  
Disconnection or short-circuit  
The lamp on the  
indoor unit blinks  
when error is  
defected.  
1. Check the outdoor heat exchanger  
sensor (TD).  
2. Check the outdoor P.C. board.  
The reply serial signal has been  
transmitted when starting the  
unit, but stops being transmitted  
shortly after.  
Operation  
continues.  
The lamp on the  
indoor unit blinks  
when error is  
defected. And it  
returns to the  
1. Repeatedly turn the indoor unit on and  
off with the interval of approx. 10 to 40  
minutes. (The check code is not  
indicated during operation.) And supply  
gas. (Check gas leak.)  
Other parts  
(including  
compressor)  
1. Compressor thermo operation  
Gas shortage  
normal condition  
when recovering  
from errors.  
2. The indoor unit operates normally  
during the check.  
If the reply serial signal continues to be  
transmitted between 2 and 3 of the  
indoor terminal block, replace the  
outdoor P.C. board.  
Gas leak  
2. Instantaneous power failure  
If the signal stops between them,  
replace the indoor P.C. board.  
The discharge temperature is  
over 120°C.  
All off  
All off  
The lamp on the  
indoor unit blinks  
when error is  
defected.  
1. Check the heat exchanger sensor (TD).  
2. Gas purging  
The IOL operation is defective.  
The lamp on the  
indoor unit blinks  
when error is  
detected.  
When turning on the unit, the normal  
phase (RST) is detected but T-R waveform  
has not been detected for 120 seconds or  
more.  
23 –  
FILE NO. SVM-06012  
Table 9-2-2  
Operation of diagnostic function  
Judgement and action  
Check  
code  
Unit  
status  
Block  
Symptom  
Condition  
[MODE]  
[TIMER] lamp  
5Hz flash  
The serial signal is not output  
from outdoor unit to indoor unit.  
Miscabling of inter-unit cables  
Defective serial sending circuit  
on outdoor P.C. board  
Defective serial receiving circuit  
on outdoor P.C. board  
Compressor case thermo  
operation  
Operation  
continues.  
Displayed when  
error is detected  
1. Outdoor unit does not completely  
operate.  
Inter-unit cable check, correction of  
miscabling  
Outdoor P.C. board check, P.C. board  
cables check  
Compressor case thermo check  
2. In normal operation  
When outdoor sending serial LED  
(Green) flashes, the receiving serial  
LED (Orange) also flashes. : Indoor  
P.C. board (Main P.C. board) check  
When the receiving serial LED (Orange)  
does not flash: Outdoor P.C. board  
check  
BUS communication circuit error  
* BUS communication was  
interrupted over the specified  
time.  
Operation  
continues  
(According  
to remote  
control of  
indoor  
Displayed when  
error is detected  
1. Communication line check, miscabling  
check  
Power supply check for central control  
(Central control remote control, etc.)  
and indoor unit  
2. Communication check (XY terminal)  
3. Indoor P.C. board check  
4. Central control check  
unit)  
(Communication P.C. board)  
Error in 4-way valve system  
Indoor heat exchanger  
temperature rise after start of  
cooling operation.  
Indoor heat exchanger  
temperature fall after start of  
heating operation.  
Operation  
continues.  
Displayed when  
error is detected  
1. Check 4-way valve.  
2. Check 2-way valve and non-return  
valve.  
3. Check indoor heat exchanger sensor  
(TC).  
4. Check indoor P.C. board  
(Main P.C. board).  
Error in other cycles  
Operation  
continues.  
Displayed when  
error is detected  
1. Compressor case thermo operation.  
2. Coming-off of detection part of indoor  
heat exchanger sensor.  
Indoor heat exchanger temp  
(TC) does not vary after start of  
cooling/ heating operation.  
3. Check indoor heat exchanger sensor  
(TC).  
*
4. Check indoor P.C. board  
(Main P.C. board).  
[MODE] lamp  
5Hz flash  
Coming-off, disconnection or  
short of indoor temp sensor (TA)  
Operation  
continues.  
Displayed when  
error is detected  
1. Check indoor temp sensor (TA).  
2. Check indoor P.C. board  
(Main P.C. board).  
Coming-off, disconnection or  
short of indoor temp sensor (TC)  
Operation  
continues.  
Displayed when  
error is detected  
1. Check indoor temp sensor (TC).  
2. Check indoor P.C. board  
(Main P.C. board).  
Coming-off, disconnection or  
short of indoor temp sensor  
(TCJ)  
Operation  
continues.  
Displayed when  
error is detected  
1. Check indoor temp sensor (TCJ).  
2. Check indoor P.C. board (Main P.C.  
board).  
[MODE] lamp  
5Hz flash  
Error in indoor fan system  
Revolutions frequency error of fan  
All stop  
Displayed when  
error is detected  
1. Check indoor fan motor connector  
circuit (CN210).  
2. Check indoor fan.  
3. Check indoor P.C. board  
(Main P.C. board).  
Error in indoor unit or other  
positions  
1. EEPROM access error  
Operation  
continues.  
Displayed when  
error is detected  
1. Check indoor P.C. board  
(EEPROM and peripheral circuits)  
(Main P.C. board).  
Outside error input  
Detected by input voltage level  
from outside devices  
Operation  
continues.  
Displayed when  
error is detected  
1. Check outside devices.  
2. Check indoor P.C. board  
(Main P.C. board).  
Outside interlock input  
Detected by input voltage level  
from outside devices  
All stop  
Displayed when  
error is detected  
*: No display in the setting at shipment  
24 –  
FILE NO. SVM-06012  
Table 9-2-3  
Operation of diagnostic function  
Judgement and action  
Check code  
Symptom  
Unit status  
Condition  
Inverter over-current protective circuit  
operates.  
(For a short time)  
All stop  
Displayed when  
error is detected  
1. Inverter immediately stops even if restarted.  
Compressor rare short  
2. Check IPDU.  
Cabling error  
Error on current detection circuit  
Current value is high at AC side even  
while compressor stops.  
All stop  
Displayed when  
error is detected  
1. Compressor immediately stops even if restarted.  
: Check IPDU.  
2. Phase-missing operation of power supply  
Phase of power supply is missed.  
Check power voltage of R, S, T.  
Coming-off, disconnection or short of  
outdoor temp sensor  
All stop  
All stop  
All stop  
Displayed when  
error is detected  
1. Check outdoor temp sensor (TE, TS).  
2. Check CDB.  
Coming-off, disconnection or short of  
outdoor temp sensor  
Displayed when  
error is detected  
1. Check outdoor temp sensor (TD).  
2. Check CDB.  
Compressor drive output error  
Tin thermistor temp, Tin error  
(IPDU heat sink temp. is high.)  
Communication error between IPDU  
Connector coming-off between CDB and  
IPDU  
Displayed when  
error is detected  
1. Abnormal overload operation of refrigerating  
cycle  
2. Loosening of screws and contact error of IPDU  
and heat sink  
3. Cooling error of heat sink  
4. Check cabling of CDB and IPDU.  
Compressor does not rotate. (Over-current All stop  
protective circuit works when constant time  
passed after activation of compressor.)  
Displayed when  
error is detected  
1. Compressor error (Compressor lock, etc.)  
: Replace compressor.  
2. Cabling trouble of compressor (Phase missing)  
Discharge temp error  
Discharge temp over specified value was  
detected.  
All stop  
Displayed when  
error is detected  
1. Check refrigerating cycle. (Gas leak)  
2. Error of electron control valve  
3. Check pipe sensor (TD).  
Compressor breakdown  
Operation frequency lowered and stops  
though operation had started.  
All stop  
Displayed when  
error is detected  
1. Check power voltage. (AC200V±20V)  
2. Overload operation of refrigerating cycle  
3. Check current detection circuit at AC side.  
High-voltage protection error by TE sensor All stop  
TE temp over specified value was  
detected.  
Displayed when  
error is detected  
1. Overload operation of refrigerating cycle  
2. Check outdoor temp sensor (TE).  
DC outdoor fan motor error  
IDC operation or lock was detected by  
DC outdoor fan driving.  
All stop  
Displayed when  
error is detected  
1. Position detection error  
2. Over-current protection circuit operation of  
outdoor fan drive unit  
Check CDB.  
Refer to Judgment of outdoor fan.  
Error on IPDU position detection circuit  
All stop  
Displayed when  
error is detected  
1. Position detection circuit operates even if driving  
by removing 3P connector of compressor.  
Replace IPDU.  
Coming-off, disconnection or short of  
outdoor temp sensor  
Operation  
continues.  
Displayed when  
error is detected  
1. Check outdoor temp sensor (TO).  
2. Check P.C. board.  
25 –  
FILE NO. SVM-06012  
Relational graph of temperature sensor resistance value and temperature  
20  
10  
0
40  
30  
TA sensor  
TC, TCJ sensor  
Caracteristics-2  
Caracteristics-1  
Resistance  
(k  
Resistance  
(k  
)
)
20  
10  
0
10 20 30  
40 50  
10  
0
10 20  
30 40 50 60 70  
Temperature [°C]  
Temperature [°C]  
TE, TO, TS sensor  
20  
200  
Caracteristics-3  
Resistance  
(k  
(10°C or lower)  
100  
Resistance  
(k  
)
)  
(10°C or higher)  
10  
0
0
10  
0
10 20 30  
40 50 60 70  
Temperature [°C]  
TD sensor  
20  
200  
Caracteristics-4  
Resistance  
(k  
(50°C or lower)  
100  
Resistance  
(k  
(50°C or higher)  
10  
)
)  
0
0
50  
100  
Temperature [°C]  
26 –  
FILE NO. SVM-06012  
10. DETACHMENTS  
10-1. Indoor Unit  
No.  
Part name  
Procedures  
Remarks  
Air Inlet grille  
1
<How to remove the Air inlet grille>  
1) Stop the operation of the Air conditioner  
and turn off its main power supply.  
2) Open the Air inlet grille with both hands.  
Air inlet grille  
3) Unfasten 3 screws (about two to three  
rounds) for fixing the Panel arms.  
4) Move the Air inlet grille toward.  
Panel arm  
5) Remove the Grille stopper from the axis of  
the Front panel. After that, remove the Air  
inlet grille.  
Grille stopper  
Air inlet grille  
Panel arm  
6) Remove the Panel arms from the Front panel.  
<How to install the Air inlet grille>  
1) Insert three Panel arms on the Air inlet  
grille and fix each securely by screws.  
2) Set the Air inlet grille arm to the axis of the  
Front panel.  
3) Insert the Grille stopper to the correct  
position and fix it securely with screws.  
4) Push the Air inlet grille to the correct position.  
27 –  
FILE NO. SVM-06012  
No.  
Part name  
Procedures  
Remarks  
Front panel  
2
<How to remove the Front panel>  
1) Remove the Air inlet grille. (1)  
2) In case of the Drain hose is installed  
through the Front panel.  
: Remove the Drain band from the Front  
panel.  
: Cut away the Opening base for piping  
from Front panel and keep parts.  
Drain panel  
Drain band  
Cap screws  
3) Open 3 Cap screws and remove the  
screws.  
Front Panel  
4) Remove 5 screws fixing the Front panel.  
Screws  
5) Remove the hooks of the Panel LED nearly  
side from the Drain pan.  
(Continue)  
28 –  
FILE NO. SVM-06012  
No.  
Part name  
Procedures  
Remarks  
Front panel  
2
6) Remove both side hooks and remove the  
Front panel by turn to air inlet part  
direction.  
Hook  
<How to install the Front panel>  
1) In case of the Drain hose installation  
through the Front panel, install the opening  
base for piping in the Back body by a screw  
(M4 x 12). Prepare it by yourself.  
2) Fit the Front panel in the Drain pan. Then  
fix it in the Drain pan with 2 hooks in the  
center of the air outlet.  
3) Fix 5 hooks around the Front panel with  
conformation the Guide-rib is inserting into  
the Back body.  
4) Fix 8 screws and close 3 Cap screws.  
5) Install the Drain band into the Front panel.  
6) Check the gap between the Front panel  
and the Back body.  
Guide-rib  
3
<How to remove the Drain pan>  
Drain pan  
assembly  
1) Remove the Air inlet grille and the Front  
panel. (1, 2)  
2) Remove the Louver motor from the Drain  
pan.  
Louver motor  
Electrical wire  
3) Remove the shaft of Horizontal louver.  
4) Remove the LED base and Electrical wire.  
LED base  
Shaft of Horizontal lover  
TA sensor  
Drain hose  
5) Remove the TA sensor wire.  
6) Remove the Drain hose.  
(Continue)  
29 –  
FILE NO. SVM-06012  
No.  
Part name  
Drain pan  
assembly  
Procedures  
Remarks  
Screw  
3
7) Remove 7 screws and remove the Drain  
pan assembly.  
Drain Pan  
Screw  
Electrical parts  
assembly  
4
<How to remove the Electrical parts assembly>  
Refrigeration  
1) Remove the Air inlet grille, the Front panel  
and the Drain pan assembly. (1, 2, 3)  
2) Remove the Terminal cover.  
TC sensor  
assembly  
Connecting  
cable  
Earth wire  
Cord clamp  
3) Unfasten the screw of Cord clamp and  
disconnect the connecting cable.  
4) Remove the Connector cover and  
disconnect the Fan motor cords.  
TCJ  
sensor  
5) Remove the TC sensor, TCJ sensor and  
earth wire from Refrigeration assembly.  
6) Remove the Electrical parts assembly.  
NOTE : When install the electrical parts  
assembly, fix the screw after the Back body  
is fixed.  
Electrical parts  
assembly  
Fan motor cords  
5
<How to remove the Refrigeration assembly>  
Refrigeration  
assembly  
1) Remove the Air inlet grille, the Front panel  
and the Drain pan assembly. (1, 2, 3)  
2) Stop the gas at the Outdoor unit.  
3) Remove 2 pipes from the Refrigeration  
assembly.  
TCJ sensor  
TC sensor  
Pipe holder  
Earth wire  
4) Remove the TC sensor and TCJ sensor  
from holder.  
5) Remove the pipe holder.  
6) Remove the earth wire.  
(Continue)  
30 –  
FILE NO. SVM-06012  
No.  
Part name  
Procedures  
Remarks  
Refrigeration  
assembly  
5
7) Remove 2 screws and remove the  
refrigeration assembly with pushing it to  
right hand.  
2 Screws  
Fan cover  
6
<How to remove the Multiblade fan and  
Fan motor>  
Multiblade fan  
and Fan motor  
1) Remove the Air inlet grille and the Front  
panel. (1, 2)  
2) Disconnect 2 connectors.  
3) Remove the Fan covers.  
4) Remove the Motor band with holding the  
Fan motor and then remove the Fan motor  
with the Multi-blade fans.  
Motor band  
Motor  
2 Connectors  
Multi-blade fan  
5) Unfasten the Set-screw and remove the  
Multi-blade fans.  
31 –  
FILE NO. SVM-06012  
11. EXPLODED VIEWS AND PARTS LIST  
11-1. Indoor Unit (E-Parts Assy)  
401  
402  
403  
404  
405  
406  
407  
408  
Location  
No.  
Part  
No.  
Location  
No.  
Part  
No.  
Description  
Description  
401  
401  
402  
403  
404  
405  
43T69564 PC BOARD (RAV-SM802XT-E)  
43T69565 PC BOARD (RAV-SM562XT-E)  
43T50004 SENSOR; HEAT EXCHANGER  
43T60002 TERMINAL BLOCK; 3P  
43T62003 CORD CLAMP  
406  
407  
407  
408  
43T50302 TEMPERATURE SENSOR  
43T69564 PC BOARD (RAV-SM562XT-E)  
43T69565 PC BOARD (RAV-SM802XT-E)  
43T08349 SWITCH COVER  
43T69315 DISPLAY UNIT  
32 –  
FILE NO. SVM-06012  
11-2. Indoor Unit  
220  
222  
217  
218  
227  
224  
214  
208  
207  
223  
208  
212  
216  
203  
235  
206  
219  
204  
225  
202  
221  
226  
213  
211  
210  
229  
209  
215  
233  
228  
231  
234  
235  
205  
201  
230  
232  
Location  
No.  
Part  
No.  
Location  
No.  
Part  
No.  
Description  
Description  
201  
202  
203  
204  
205  
206  
207  
208  
209  
210  
211  
212  
213  
214  
215  
216  
217  
218  
43T09379 AIR-GRILLE  
219  
220  
221  
222  
223  
224  
225  
226  
227  
228  
229  
230  
231  
233  
43T03339 BACK BODY ASSY  
43T09314 VERTICAL LOUVER  
43T49303 PIPE HOLDER  
43T00445 PANEL ARM ASSY  
43T00446 FRONT PANEL ASSY  
43T01306 MARK  
43T19324 COVER BODY L  
43T19325 COVER BODY R  
43T19328 COVER BODY LD  
43T19326 BUSH BODY R  
43T79312 DRAIN BAND  
43T80302 AIR FILTER  
43T00433 CAP SCREW C  
43T00434 CAP SCREW LR  
43T20303 FAN COVER  
43T19327 BUSH BODY D  
43T82308 PLATE; INSTALLATION  
43T60314 TERMINAL COVER  
43T62303 CONNECTOR COVER  
43T83003 HOLDER; REMOTE CONTROLLER  
43T69309 WRIRELESS REMOCON  
43T49326 FLEXIBLE PIPE ASSY  
(SM562XT-E)  
43T20318 MOTOR BAND ASSY  
43T20317 FAN ASSY (MULTIBLADE FAN)  
43T19309 SCREW SET (D-T)  
43T21369 FAN MOTOR  
43T72309 DRAIN PAN ASSY  
43T79311 GUIDE DRAIN  
43T21376 MOTOR; STEPPING  
43T09378 HORIZONTAL LOUVER FLOCK  
43T44377 REFRIGERATION ASSY  
(SM562XT-E)  
233  
43T49328 FLEXIBLE PIPE ASSY  
(SM802XT-E)  
234  
43T80003 FILTER; FRAME  
43T00447 ASM-GRILLE-STOPPER  
235  
218  
43T44378 REFRIGERATION ASSY  
(SM802XT-E)  
33 –  
T O S H IB A C A R R IE R ( T H A IL A N D ) C O . , LT D .  
1 4 4 / 9 MOO 5 , BANGKADI INDUSTRIAL PARK, TIVANON ROAD, TAMBOL BANGKADI,  
AMPHUR MUANG, PATHUMTHANI 1 2 0 0 0 , THAILAND.  

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