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—25—

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.)

Check the system for a restriction.

Fan

Blower

Loose clamper

Worn bearings

Voltage

Wiring

Rotary

Thermostat

Capacitor (Discharge
capacitor before servicing.) 

Compressor

Overload

Voltage

Overload

Refrigerating system

Fan motor noise.

Compressor will not run,
but fan motor runs.

Compressor cycles on
overload.

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■

MOTOR

COMP.

1

2

4

6

8

7

H

L

C

F

C

C

H

L3

L2

L1

DEICER PWB ASSY

BK(BR)

(Plain)

WH(BL)

(Ribbed)

WH

WH

BL

BL

BL

BL

BL

RD

RD

BK

BK

BK

BK

BK

BK

BK(RD)

BK(RD)

BK

BK

BL

RD

RD

RD

YL

YL

YL

YL

OR

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

WIRING  DIAGRAM

3854A20022M

MOTOR

RD   

BK   

BL   

BK   

RD   

BL   

BL   

OR(BR)   

BK 

RD    

OR(BR)  

YL    

F 

C 

H 

CAPACITOR

R

C

COMP.

TRANS-
FORMER

S

RD   

THERMISTOR

BK   

OR(BR)  

BK(BR)  

POWER  INPUT

(Plain)

CN-TH

RY-HI

CN-DISP

DISPLAY 

P.W.B ASSY

RY-COMP

ZNR

MAIN P.W.B ASSY

RY-4WAY

CN-4WAY

BK(RD)

BK(RD)

BK

T/B 1

T/B 2

BK

SUMP
HEATER

BK

BK

RD

RD

RD

RD

REVERSING COIL

4

3

RY-LO

GN/YL(GN)

WH(BL)

(Ribbed)

YL    

BR   

BR   

SYNC.

MOTOR

CN-

SYNC

RY-SYNC

GN/YL

(GN)

FUSE 

250V/T2A

(115V/T2A)

OLP

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