Room Air Conditioner
Service and Parts
Manual
CP05N10A
115 Volts
CP05 Svc Parts 2010 (05/10)
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1. PREFACE
This service manual provides various service information, including the mechanical and electrical parts, etc.
This room air conditioner was manufactured and assembled under a strict quality control system.
The refrigerant is charged at the factory. Be sure to read the safety precautions prior to servicing the unit.
1.1 FEATURES
‡ DESIGNED FOR COOLING ONLY
‡ BUILT-IN ADJUSTABLE THERMOSTAT
‡ WASHABLE ONE-TOUCH FILTER
‡ COMPACT SIZE
1.2 SPECIFICATIONS
1.2-2 SPECIFICATIONS
MODELS
CP05N10A
ITEMS
COOLING CAPACITY (BTU/h)
POWER SUPPLY (Phase, V, Hz)
INPUT (W)
5,450
1ø, 115V, 60HZ
510
OPERATING CURRENT (AMP.)
REFRIGERANT CONTROL
REFRIGERANT CHARGE (R410A)
INSIDE FAN
4.8
CAPILLARY TUBE
280g (9.9 oz)
TURBO FAN
OUTSIDE FAN
PROPELLER FAN WITH SLINGER RING
2-WAY (RIGHT AND LEFT)
TOP-DOWN
AIR DISCHARGE
CHASSIS
‡ꢀOVERLOAD PROTECTOR FOR COMPRESSOR
‡ꢀ,17(51$/ꢀ3ROTECTOR FOR FAN MOTOR
PROTECTOR
TEMPERATURE CONTROL
FAN MOTOR
THERMISTOR
4 POLES,21W
—2—
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1.3 LOCATIONS OF CONTROLS
1
TEMPERATURE SETTING
• These buttons control the temperature of the room.
The temperature can be set within a range of 60°F to 86°F, in increments of 1°F.
2
MONEY SAVER
The fan stops when the compressor stops cooling.
• Approximately every 3 minutes the fan will turn on and sample the room air to determine if
more cooling is needed.
3
4
OPERATION MODE SELECTOR
• Everytime you push this button, it will rotate between the COOL, FAN and DRY modes.
ON/OFF TIMER
ON–When the air conditioner is off, it can be set to automatically
come on in 1 to 12 hours from its previous setting. Each touch will increase the timer by 1
hour.
OFF–When the air conditioner is on, it can be set to automatically
turn off in 1 to 12 hours. Each touch will increase the timer by 1 hour. After the timer has been
on for 30 minutes, the temperature will automatically rise 2°F, and after another 30 minutes, it
will automatically rise 2°F again. The temperature will then stay the same until the timer goes
OFF.
To cancel the timer, press the TIMER pad until the display time disappears.
5
6
POWER
• To turn the unit ON, push the button. To turn the unit OFF, push the button again.
• This button takes priority over any other buttons.
• When you first turn it on, the unit is on the High cool mode and the temp. at 72°F
FAN SPEED
• Everytime you push this button it will rotate between the following fan speeds:
High (F3) → Low(F1) → Medium (F2) → High (F3)
—3—
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2. DISASSEMBLY INSTRUCTIONS
2.1 MECHANICAL PARTS
2.1.1 FRONT GRILLE
1. Pull the inlet grille forward.
Figure 1
2. Remove the screw securing the Front Grille. (Fig. 3)
3. Push the grille up from the bottom and pull the top of
the grille away from the case to lift the top tabs out of
their slots. (Fig. 4)
4. Carefully position the grille, bottom first, and snap back
into place.
5. Reposition the screw that secures the front grille
Figure 2
2.1.2 CABINET
1. Disconnect the unit from the power source.
2. Remove the front grille. (Refer to section 2.1.1)
3. Remove 9 screws that secure the cabinet to the
base pan and condenser. (See Figure 3)
4. Lift the cabinet from the unit.
5. Re-install by referring to the procedures above.
Figure 3
2.1.3 CONTROL PANEL
2. Remove the front grille. (Refer to Section 2.1.1)
3. Remove the cabinet. (Refer to Section 2.1.2)
4. Remove 1 screws that secure the control board to
base pan and air guide. (See Figure 4)
5. Pull the control panel toward yourself.
NOTE : Controls, wires, and capacitor are now
accessible for servicing. Discharge the
capacitor before servicing. See step
2.3.3 on page 8 for procedures.
Figure 4
the fan motor and compressor. (See Figure 5)
7. Re-install components by referring to procedures
above. (Refer to wiring diagram on page 23 in this
manual or inside control board.)
Figure 5
—4—
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Figure 6
2.2 AIR HANDLING PARTS
2.2.1 AIR GUIDE UPPER
1. Disconnect the unit from the power source.
2. Remove the front grille. (Refer to Section 2.1.1)
3. Remove the cabinet. (Refer to Section 2.1.2)
4. Remove the control panel.
(Refer to Section 2.1.3)
5. Remove 2 screws that secure the upper air guide
to air guide lower. (See Figure 6)
6. Lift upper air guide upward.
7. Re-install by referring to the procedures above.
Figure 7
2.2.2 ORIFICE, TURBO FAN AND FAN
1. Disconnect the unit from the power source.
2. Remove the front grille. (Refer to Section 2.1.1)
3. Remove the cabinet. (Refer to Section 2.1.2)
4. Remove the control board.
(Refer to Section 2.1.3)
5. Remove the air guide upper.
(Refer to Section 2.2.1)
6. Remove 2 screws that secure the base pan to
condenser. (See Figure 7)
7. Remove screw that secures the shroud to
channel of condenser.
Figure 8
8. Press the snap area of shroud with your thumbs.
This allows you to remove it from the condenser.
9. Lift the compressor upward with the evaporator
and condenser. (See Figure 7)
10. Remove the orfice by pushing the snap area of
the air guide blower. (See Figure 8)
11. Remove the clamp springs which are clamped to
the shaft of fan and turbo fan by hand plier. (See
Figure 9)
12. Pull the fan and turbo fan outward.
13. Remove the shroud.
14. Re-install by referring to the procedures above.
Figure 9
—5—
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2.2.3 MOTOR
Figure 10
1. Disconnect the unit from the power source.
2. Remove the front grille. (Refer to Section 2.1.1)
3. Remove the cabinet. (Refer to Section 2.1.2)
4. Remove the control panel.
(Refer to Section 2.1.3)
5. Remove the upper air guide.
(Refer to Section 2.2.1)
6. Remove the compressor, turbo fan, fan and
shroud. (Refer to Section 2.2.2)
7. Remove 2 screws that secure the motor to the
motor mount . (See Figure 10)
8. Remove the motor.
9. Re-install by referring to the procedures above.
Figure 11
2.2.4 AIR GUIDE
1. Disconnect the unit from the power source.
2. Remove the front grille. (Refer to Section 2.1.1)
3. Remove the cabinet. (Refer to Section 2.1.2)
4. Remove the control panel.
(Refer to Section 2.1.3)
5. Remove the upper air guide .
(Refer to Section 2.2.1)
6. Remove the compressor, turbo fan, fan and
shroud. (Refer to Section 2.2.2)
7. Remove the motor. (Refer to Section 2.2.3)
8. Remove 2 screws that secure the air guide to the
base pan. (See Figure 11)
9. Push the air guide backward and lift it upward.
(See Figure 11)
10. Re-install by referring to the procedures above.
Figure 13
Figure 12
2.3 ELECTRICAL PARTS
2.3.1 OVERLOAD PROTECTOR
1. Remove the front grille and cabinet.
(Refer to Section 2.1)
2. Remove the nut which fastens the terminal cover.
3. Remove the terminal cover.
4. Remove all the leads from the overload protector.
5. Remove the overload protector.
6. Re-install the components by referring to the
removal procedure above.
(See Figure 12 and 13)
—6—
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2.3.2 COMPRESSOR
1. Remove the front grille and cabinet.
Figure 14
(Refer to Section 2.1)
2. Discharge the refrigerant by using a refrigerant
recovery system.
3. Remove the overload protector.
(Refer to Section 2.3.1)
4. After discharging the unit completely, unbrace the
suction and discharge pipes at the compressor
connections.
5. Remove 3 nuts which fasten the compressor.
6. Remove the compressor.
7. Re-install by referring to the removal procedure
above. (See Figure 14)
2.3.3 CAPACITOR
1. Remove the cabinet. (Refer to Section 2.1.2)
2. Remove the control panel.
Figure 15
(Refer to Section 2.1.3)
3. Discharge the capacitor by placing a 20 KΩ
resistor across the capacitor terminals.
4. Remove the screw which fastens the capacitor
clamp.
5. Remove all the leads of capacitor terminals.
6. Re-install the components by referring to the
removal procedure above. (See Figure 15)
2.3.4 THERMISTOR
1. Remove the cabinet. (Refer to Section 2.1.2)
2. Remove the control panel.
Figure 16
(Refer to Section 2.1.3)
3. Disconnect the thermistor terminals from main
P.W.B assembly.
4. Remove the thermistor.
5. Re-install the components by referring to the
removal procedure above. (See Figure 16)
Figure 17
2.3.5 CONTROL BOARD
1. Remove the cabinet. (Refer to Section 2.1.2)
2. Remove the control panel.
(Refer to Section 2.1.3)
3. Pull the control board forward and pull out it.
4. Remove 2 lead wire terminals.
5. Re-install the components by referring to the
removal procedure above. (See Figure 17)
—7—
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Figure 18
2.3.6 POWER CORD
1. Disconnect the unit from source of power.
2. Remove the front grille. (Refer to Section 2.1.1)
3. Remove the cabinet. (Refer to Section 2.1.2)
4. Remove a screw that secures control panel to
base pan. (Refer to Section 2.1.3)
5. Pulls the control board toward you.
6. Disconnect the 2 receptacles and remove the
grounding screw.
7. Remove a screw securing the clip with cord to the
control panel.
8. Pull the power cord.
9. Re-install by referring to procedures above.
Figure19
2.4 REFRIGERANT CYCLE
2.4.1 CONDENSER
1. Remove the cabinet. (Refer to Section 2.1.2)
2. Discharge the refrigerant by using a refrigerant
recovery system.
3. Remove the air guide. (Refer to Section 2.2.1)
4. Remove 2 screws which fasten the condenser.
5. After discharging the refrigerant completely,
unbraze the interconnecting tube at the
condenser connections.
6. Remove the condenser.
7. Re-install by referring to the procedures above.
—8—
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wise. This will keep oil from foaming and being
drawn into the vacuum pump.
2.4.2 EVAPORATOR
1. Remove the cabinet.
2. Discharge the refrigerant by using a refrigerant
recovery system.
3. Remove the upper air guide . (Refer to Section
2.2.1)
4. After discharging the refrigerant completely,
unbraze the interconnecting tube at the condenser
connections.
6-3. Operate the vacuum pump for 20 to 30 min-
utes, until 600 micron vacuum is obtained.
Close valves A and B and observe vacuum
gauge for a few minutes.
A rise in pressure would indicate a possible
leak or moisture remaining in the system.
With valves A and B closed, stop the vacuum
pump.
5. Remove the evaporator.
6. Re-install by referring to the procedures above.
6-4. Remove the hose from the vacuum pump and
place it on the charging cylinder. See figure
20B. Open valve C.
2.4.3 CAPILLARY TUBE
1. Remove the cabinet.
Discharge the line at the manifold connection.
6-5. The system is now ready for final charging.
7. Recharge as follows:
2. Discharge the refrigerant by using a refrigerant
recovery system.
3. Remove the upper air guide. (Refer to Section
2.2.1)
4. After discharging the refrigerant completely,
unbraze the interconnecting tube of the capillary
tube.
5. Remove the capillary tube.
6. Re-install by referring to the procedures above.
7-1. Rotary compressor systems are charged from
the high-side. If the total charge cannot be put
in the high-side, the balance will be put in the
suction line through the access valve which is
installed as the system is opened.
7-2. Connect the charging cylinder as shown in fig-
ure20B. With valve C open, discharge the
hose at the manifold connection.
NOTES
7-3. Open valve A and allow the proper charge to
enter the system. Valve B is still closed.
7-4. If more charge is required, the high-side will
not take it. Close valve A.
7-5. With the unit running, open valve B and add
the balance of the charge.
Replacement of the refrigeration cycle.
1. When replacing the refrigerating cycle, be sure to
discharge the refrigerant by using a refrigerant
recovery system.
2. After discharging the unit completely, remove the
desired components, and unbraze the pinch-off
tubes.
3. Solder service valves into the pinch-off tube ports,
leaving the valves open.
4. Solder the pinch-off tubes with service valves.
5. After completing the above procedures, the valve
must be removed .
a. Do not add the liquid refrigerant to the low-
side.
b. Watch the low-side gauge, allow pressure to
rise to 39 lbs.
c. Turn off valve B and allow the pressure to
drop.
d. Repeat steps B and C until the balance of
the charge is in the system.
7-6. When the unit is operating correctly, use the
pinch-off tool with the unit still running and the
clamp on the pinch-off tube. Using a tube cut-
ter, cut the pinch-off tube about 2 inches from
the pinch-off tool. Use sil-fos solder and solder
the pinch-off tube closed. Turn off the unit,
allow setting for a while and then test the leak-
age of the pinch-off connection.
6. Evacuate as follows:
6-1. Connect the vacuum pump, as illustrated in
figure 20A.
6-2. Start the vacuum pump. Slowly open manifold
valves A and B with two full turns counter-
clockwise and leave the valves closed.
The vacuum pump is now pulling through
valves A and B up to valve C by means of
manifold and the entire system.
CAUTION : If high vacuum equipment is used,
just crack valves A and B for a few minutes, then
open slowly with the two full turns counter-clock-
—9—
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Equipment needed: Vacuum pump, charging cylinder, manifold gauge, brazing equipment, pinch-off tool capable
of making a vapor proof seal, leak detector, tubing cutter, hand tools to remove components and service valve.
COMPOUND GAUGE
MANIFOLD
GAUGE
B
A
CONDENSER
(HIGH PRESSURE SIDE)
SEE INSETS
BELOW
COMPRESSOR
EVAPORATOR
(LOW PRESSURE SIDE)
CAPILLARY TUBE
LO
HI CHARGING CYLINDER
A
A
B
B
EXTERNAL VACUUM PUMP
C
Figure 20A-Pulling Vacuum
Figure 20B-Charging
—10—
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2.4.4 ELECTRICAL DATA
Line Cord Plug
Use Wall Receptacle
Power Supply
Do not under any
circumstances cut
or remove the
grounding prong
from the plug.
Use 15 AMP, time
delay fuse, or circuit
breaker.
Power supply cord with
3-prong grounding plug
Standard 125V, 3-wire grounding
receptacle rated 15A, 125V AC
USE OF EXTENSION CORDS
Because of potential safety hazards, we strongly discourage the use of an extension cord. However, if you wish to use an extension
cord, use a CSA certified/UL-listed 3-wire (grounding) extension cord, rated 15A, 125V.
3. TROUBLESHOOTING GUIDE
3.1 OUTSIDE DIMENSIONS (unit: mm [in])
21
9
21
42 (1 /32")
370 (14 /16")
472 (18 9/16")
42 (1 /32")
3
120 (4 /4")
3
27.5 (1 /32")
22.5(0.8 3/32")
155(6 3/32")
9
370 (14 /16")
9
472 (18 /16")
—11—
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3.2 PIPING SYSTEM
CONDENSER COILS
FAN
MOTOR
CAPILLARY
TUBE
TURBO FAN
EVAPORATOR
COILS
Following is a brief description of the important components and their function in what is called the refrigeration
system. Reference should be made to Figure 21 to follow the refrigerating cycle and the flow of the refrigerant in
the cooling cycle.
ROOM AIR CONDITIONER
CYCLE OF REFRIGERATION
EVAPORATOR COILS
CONDENSER COILS
VAPOR INLET
SUCTION LINE
COOL LOW PRESSURE VAPOR
HOT
DISCHARGED
AIR
COMPLETE LIQUID
BOIL OFF POINT
COOLED
AIR
ROOM AIR HEAT LOAD
OUTSIDE COOLING
AIR FOR REFRIGERANT
PASS THROUGH
MOTOR
DISCHARGE
LINE
NOT HIGH PRESSURE
VAPOR
COMPRESSOR
OIL
LIQUID
PRESSURE
DROP
LIQUID OUTLET
(LIQUID REFRIGERANT)
HIGH PRESSURE VAPOR
LIQUID REFRIGERANT
LOW PRESSURE VAPOR
CAPILLARY TUBE
Figure 21
—12—
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3.3 TROUBLESHOOTING GUIDE
In general, possible trouble is classified in two kinds.
The one is called Starting Failure which is caused by an electrical defect. The other is Ineffective Air Con-
ditioning caused by a defect in the refrigeration circuit and improper application.
Unit is running but cooling is ineffective.
Ineffective Cooling
Check cold air
circulation for smooth
flow.
Check outdoor coil
(heat exchanger) and
fan operation.
Check heat load
increase.
Clean condenser.
Dirty indoor coil
(heat exchanger)
Check for gas leakage.
Repair gas leak.
Not on dedicated circuit.
Malfunction of fan.
Clogging air filter.
Check inside gas
pressure.
Replacement of unit if
the unit is beyond repair.
Adjust refrigerant
charge.
Obstruction at air outlet.
Remove obstruction.
Malfunction of
compressor.
Check for restriction in refri -
geration circuit.
Replacement of
compressor.
Satisfactory operation
with temperature
Remove restriction in
refrigeration circuit.
difference of inlet & outlet
air; 18~26°F.
—13—
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Fails to Start
Check of circuit breaker
and fuse.
Check voltage power source.
Check control switch
setting.
Gas leakage of feeler
bulb of thermostat.
Check control switch.
Compressor fails to
start.
Fan fails to start.
Improper wiring.
Improper thermostat
setting
Drop of power voltage.
Defect of fan motor or
capacitor.
Defect of compressor or
capacitor.
Loose terminal
connection
Irregular motor
resistance (Ω)
Irregular motor
insulation (Ω)
Capacitor check.
Replacement.
Improper wiring
Replacement of fan motor.
Irregular motor resistance (Ω)
Irregular motor insulation (Ω)
Regular but fails to start.
Replacement of compressor.
Replacement of compressor
(Motor damaged).
—14—
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ROOM AIR CONDITIONER VOLTAGE LIMITS
NAME PLATE RATING
115V ± 10%
MINIMUM
103.5V
MAXIMUM
126.5V
COMPLAINT
CAUSE
REMEDY
Fan motor will not run.
No power
Check voltage at outlet. Correct if none.
Power supply cord
Check voltage to electronic control board. If none,
check power supply cord. Replace cord if circuit is
open.
Wire disconnected or
connection loose
Connect wire. Refer to wiring diagram for
terminal identification. Repair or replace loose
terminal.
Capacitor (Discharge
Test capacitor.
capacitor before testing.)
Replace if not within ±10% of manufacturer's
rating. Replace if shorted, open, or damaged.
Will not rotate
Fan blade hitting shroud or blower wheel hitting
scroll. Re-align assembly.
Units using slinger ring condenser fans must
have 1/4" inch clearance to the base.
If necessary, shim up the bottom of the fan motor
with mounting screw(s).
Check fan motor bearings; if motor shaft will not
rotate, replace the motor.
Fan motor runs.
Revolves on overload
Check voltage. See limits on this page.
If not within limits, call an electrician.
Test capacitor.
Check bearings. Does the fan blade rotate
freely?
If not, replace fan motor.
Pay attention to any change from high speed to
low speed. If the speed does not change,
replace the motor.
—15—
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—16—
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COMPLAINT
CAUSE
Fan motor
REMEDY
Compressor cycles on
overload.
If not running, determine the cause. Replace if
required.
Condenser air flow
restriction
Remove the cabinet, inspect the interior surface
of the condenser. If restricted, clean carefully
with a vacuum cleaner (do not damage fins) or
brush. Clean the interior base before
re-assembling.
Condenser fins
(damaged)
If the condenser fins are closed over a large
area on the coil surface, head pressures will
increase, causing the compressor to cycle.
Straighten the fins or replace the coil.
Capacitor
Test the capacitor.
Wiring
Check the terminals. If loose, repair or replace.
Check the system for a restriction.
If restricted, clean or replace.
Refrigeration system
Air filter
Insufficient cooling
Excessive noise
Unit undersized
Blower or fan
Determine if the unit is properly sized for the
area to be cooled.
Check the set screw, or clamp. If loose or miss-
ing, correct. If the blower or fan is hitting scroll
or barrier, rearrange the air handling parts.
Copper tubing
Remove the cabinet and carefully rearrange the
tubing not to contact the cabinet,
compressor, shroud, and barrier.
—17—
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4. CIRCUIT DIAGRAM
WH
(BL)
(SMPS)
250V/T2A
(250V/T3.15A)
MEZ62420702
LOCATION
PART NO
CP05N10A PER SET
67300020
67400116
Q'TY
DESCRIPTION
NO.
1
POWER CORD ASSY
FAN MOTOR
1
1
1
1
1
2
3
COMPRESSOR
CAPACITOR
-
-
4
5
OVERLOAD PROTECTOR
67301425
—18—
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145200
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LocNo
130410
130910
135312
135303
145200
149980
152302
237200
238310
249950
264110
267110
346811
349480
359012
550140
559011
567480
567502
749740
132100-1
132100-2
147582-1
147582-2
268711-1
268711-2
35211A
352390-1
352390-2
W0CZZ
W48602
DESCRIPTION
Base Assembly,Weld
Cabinet
CP05N10A
67302931
67303719
67306008
67306107
67304600
67305531
67400167
67305507
67500149
67305532
67300020
67302240
67400116
67303414
67302617
67301900
67302613
67307806
67301425
67304010
67303800
67303801
67304500
67304501
67307611
67307650
67307651
67302742
67302743
67300730
67302500
Grille Assembly,Front
Grille,Inlet
Link
Shroud
Filter,Air
Panel,Control
Escutcheon
Case Assembly,Control
Power Cord Assembly
Remote Controller Assembly
Motor Assembly,AC,Single
Orifice
Fan,Turbo
Damper,Compressor
Fan Assembly,Axial
Thermistor,NTC
Overload Protect
Guide
Frame Assembly
Frame Assembly
Louver,Vertical
Louver,Vertical
PCB Assembly,Display
PCB Assembly,Main
Tube Assembly,Suction
Guide Assembly,Air
Guide Assembly,Air
Capacitor,Film,Box
Clamp,Spring
—20—
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Use Factory Certified Parts...
FRIEDRICH AIR CONDITIONING CO.
Post Office Box 1540 • 4200 N. Pan Am Expressway • San Antonio, Texas 78295-1540
• (210) 357-4400 • FAX (210) 357-4490
CP05 Svc Parts 2010 (05/10)
P/NO:MFL38735502
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