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—22—

FAN does not operate.

Remote controller does not operate.

• Check the PCB pattern.

• Exchange Micom.

• Exchange IC01M.

Is the voltage NO.2 or 4

of IC01M DC 5V?

Is the voltage NO.13 or 15

of IC01M 0V?

• Check the RY-High or 

RY-Low.

• Check the wiring diagram.

NO

NO

YES

YES

Is the voltage of Battery

about over 2.3V?

• Exchange Receiver Ass'y.

Is the connection of 

CN-DISP2 all right?

Is the voltage No.10 

of CN-DISP2 on Main PCB 

Ass'y DC 5V?

• Exchange the battery.

• Check the PCB pattern.

• Connect connector to 
  CN-DISP2 exactly.

NO

NO

NO

YES

YES

YES

—23—

NAME PLATE RATING 

MINIMUM 

MAXIMUM 

220V~ ± 10%

198V 

242V 

220-240V~ ± 10%

198V 

264V 

Check voltage at outlet. Correct if none.

Check voltage to rotary switch. If none, check

power supply cord. Replace cord if circuit is open.

Check switch continuity. Refer to wiring diagram

for terminal identification. Replace switch if

defective.

Connect wire. Refer to wiring diagram for terminal

identification. Repair or replace loose terminal.

Test capacitor.

Replace if not within ±10% of manufacturer's

rating. Replace if shorted, open, or damaged.

Fan blade hitting shroud or blower wheel hitting

scroll. Realign assembly.

Units using slinger ring for condenser fan must

have 

1

/

4

to 

5

/

16

inch clearance to the base. If it hits

the base, 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.

Check voltage. 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.

No power

Power supply cord

Rotary switch

Wire disconnected or

connection loose

Capacitor (Discharge

capacitor before testing.)

Will not rotate

Revolves on overload.

Fan motor will not run.

Fan motor runs 

intermittently

—24—

If cracked, out of balance, or partially missing,
replace it.

If cracked, out of balance, or partially missing,
replace it.

Tighten it.

If knocking sounds continue when running or
loose, replace the motor. If the motor hums or
noise appears to be internal while running,
replace motor.

Check voltage. See the limits on the preceeding
page. If not within limits, call an electrician.

Check the wire connections, if loose, repair or
replace the terminal. If wires are off, refer to wiring
diagram for identification, and replace. Check wire
locations. If not per wiring diagram, correct.

Check for continuity, refer to the wiring diagram
for terminal identification. Replace the switch if
circuit is open.

Check the position of knob If not at the coldest
setting, advance the knob to this setting and
restart unit.
Check continuity of the thermostat. Replace
thermostat if circuit is open.

Check the capacitor.
Replace if not within ±10% of manufacturers
rating. Replace if shorted, open, or damaged.

Check the compressor for open circuit or ground. 
If open or grounded, replace the compressor.

Check the compressor overload, if externally
mounted. Replace if open. (If the compressor
temperature is high, remove the overload, cool it,
and retest.)

Check the voltage.
If not within limits, call an electrician.

Check overload, if externally mounted.
Replace if open. (If the compressor temperature
is high, remove the overload, cool, and retest.)

Fan

Blower

Loose clamper

Worn bearings

Voltage

Wiring

Rotary

Thermostat

Capacitor (Discharge
capacitor before servicing.) 

Compressor

Overload

Voltage

Overload

Fan motor noise.

Compressor will not run,
but fan motor runs.

Compressor cycles on
overload.

—26—

1

POWER CORD

3H02255E/2H01580M

1

2

ROTARY SWITCH

2H00598F

1

3

FAN MOTOR

4681A20027G

1

4

CAPACITOR

6120AR2194A

1

5

LAMP

3H02488C

1

6

THERMOSTAT

2H01127B

1

7

COMPRESSOR

5416A20017A

1

8

OVERLOAD PROTECTOR

6750V-L014A

1

9

TERMINAL BLOCK

3H00390A

1

10

REVERSING COIL ASS'Y

3A02028Z

1

11

DEICER P.C.B ASS'Y

6871A20083A

1

12

THERMISTOR ASS'Y

3Q35015N

1

MOTOR

COMP.

WIRING DIAGRAM

3854AR3629E

1

2

4

6

8

7

H

L

C

F

C

H

L3

L2

L1

DEICER

PWB ASSY

BK(BR)

(Plain)

WH(BL)

(Ribbed)

WH

WH

BL

BL

BL

BL

BL

BL

BL

BK

BK

BK

BK

BK

R

S

C

BK

BK(RD)

BK(RD)

BK

BK

RD

RD

RD

RD

YL

YL

YL

YL

OR

OR

OR

R/SWITCH

BR

BR

O.L.P.

T/B 2

THERMISTOR

THERMOST

A

T

BL

BK

BK

LAMP

BK

BR

T/B 1

CAPACITOR

REVERSING COIL

12

11

4

5

7

10

1

2

6

8

9

3