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Trouble
COMMPRESSOR OPERATES
CONTINUOUSLS BUT DOES
NOT FORM SUFFICIENT ICE
BANK (CONT' D)
NOTE: If overload protector cuts out compressor, condenser fan motor will continue to operate
otherwise; troubleshooting condenser fan motor problem is same as for ' ' COMPRESSOR DOES NOT
OPERATE' 'paragraph plus the following:
CONDENSER FAN MOTOR
NOT OPERATING.
AGITATOR MOTOR NOT
OPERATING.
300381000
Probable Cause
E.
Inoperative or disconnected
pulse-modulating expansion
valve (see applicable
REFRIGERATION FLOW
DIAGRAM).
F.
Inoperative control board. No
output from board to
solenoids.
Standard Cooling Unit with
Condenser Coil and Fan
Assembly
A.
Jumper cord loose or
disconnected from condenser
fan motor or terminals inside
control box. Broken wire in
cord.
B.
Fan blade obstructed.
C.
Inoperative condenser fan
motor.
Remote Condenser Coil and Fan
assembly.
A.
Blown power circuit fuse.
B.
Fan blade obstructed.
C.
Inoperative condenser fan
motor.
D.
Cooling unit contactor
inoperable.
A.
Agitator motor propeller
obstructed.
B.
Low voltage.
C.
Loose, disconnected, or
broken wiring.
D.
Inoperative agitator motor.
44
Remedy
E.
Check that expansion valve is
operating by touch (should be
able to feel valve pulse).Check for
loose or disconnected wire to
solenoid coil. If necessary,
troubleshoot expansion valve with
a gage set to see if it is opening.
If expansion valve is not opening,
suction pressure will be in a
vacuum.
F.
Check LED' s on control board to
see if they are modulating. Check
for 24V output to pulse
modulating expansion valve (see
WIRING DIAGRAM). If control
board green LED is on and yellow
LED Is flashing; but no 24V
output, replace board.
A.
Tighten connections or replace
cord.
B.
Remove obstruction.
C.
Replace condenser fan motor.
A.
Replace power circuit fuse.
B.
Remove obstruction.
C.
Replace condenser fan motor.
D.
Replace Cooling Unit contactor.
A.
Remove obstruction.
B.
Voltage must be at least 208 volts
at compressor terminals when
compressor is trying to start
C.
Tighten connections or replace
broken wiring.
D.
Replace agitator motor.
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