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BC0530 Service Manual
Problem
Poorly formed or
cloudy ice cubes.
Actuator motor turns
clockwise at start of
defrost.
Cam arms are improp-
erly positioned when
the water plate is fully
opened and/or closed.
TROUBLE SHOOTING
Possible Cause
Water plate pressure is low. Pump oper-
ating improperly because of low supply
voltage.
Water plate pressure is low. Improper
pump installed in ice machine.
Water plate pressure is low. Water plate is
cracked or leaking
Ice cubes have large dimples or are hollow
at the end of the freeze cycle.
Water plate is out of alignment with evap-
orator.
Ice cubes do not break apart after defrost
because of thick web between cubes.
Ice cubes have uneven dimples. Dimples
are larger on right side of evaporator be-
cause of low refrigerant charge.
Ice cubes have uneven dimples. Dimples
are larger on right side of evaporator be-
cause of high evaporator superheat.
Ice cubes have uneven dimples. Dimples
are larger on left side of evaporator and
ice may freeze into the right side surface of
the water plate because of low evaporator
superheat.
Arms up and arms down switches are
defective, or the relationship between the
switches and switch operators is improper.
Arms up and arms down switch wiring is
incorrect.
The relationship between the switches and
switch operators is improper.
Measure the supply voltage with the
ice machine running. Be sure voltage is
within the specified tolerances.
Be sure the pump being used is proper
for the ice machine model.
Repair or replace water plate.
Increase the water level until ice cubes
are produced with small dimples.
Re-align water plate. See the water plate
alignment illustration for more informa-
tion
Adjust spacing between evaporator
and water plate. See the web thickness
adjustment illustration for more informa-
tion.
Remove refrigerant and recharge the
system to specifications.
Adjust the expansion valve to decrease
the evaporator superheat.
Adjust the expansion valve to increase
the evaporator superheat.
Confirm proper operation of the arms up
and arms down switches and replace if
needed. Confirm proper settings of the
switch operators and adjust as required.
Correct switch wiring.
Adjust switch operators so the cam arms
are at the 12 o'clock position when the
water plate is fully closed and at the 7
o'clock position when the water plate is
fully open. See the cam arm, switch and
switch operator relationship illustration
for more information.
March 2020
Page 40
Solution
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