Kold-Draft GB564AC - Defrost, Water Plate, and Ice Quality Issues

new 60 Series Service Manual.rev. 06.01.16.docx - 45 –
TROUBLE SHOOTING
Problem
Possible Cause
Solution
Compressor is defective.
Replace compressor. See
compressor test procedure for more
information.
Condenser fan
motor is not
operating on air-
cooled models.
Compressor is
operating
Fan motor protector open.
Replace motor if it does not run
when cool or at normal operating
conditions.
Fan motor defective
Replace motor.
Defrost
performance slow
Condenser sub-cooling >11°C at the
middle point of the freeze cycle on
liquid-cooled models.
System is overcharged with
refrigerant. Remove refrigerant and
recharge the system to
specifications.
Condenser liquid regulating valve not
closing fully during defrost on liquid-
cooled models.
Adjust, repair or replace liquid
regulating valve.
Air cooled ice machine installed in a
low ambient temperature location.
Ambient temperature must be 60°F
(15°C) minimum.
Ice frozen into the water plate
surface. Thick web between ice
cubes.
Adjust web thickness to
specifications.
Ice frozen into the water plate
surface. Cubes are fully formed
without small dimples.
Reduce the water fill level until ice
cubes are produced with small
dimples.
Ice cubes have large dimples or are
hollow at the end of the freeze cycle.
Batch weight is too light.
Increase the water level until ice
cubes are produced with small
dimples.
Evaporator grids are distorted.
Carefully straighten grids or replace
evaporator if the damage is severe.
Water plate re-
opens immediately
after closing
"Water plate up" switch lever is not
being pushed up completely.
Adjust "water plate up" switch
actuator on water plate until it
pushes up the switch lever
completely.
Water plate is prevented from closing
by some obstruction such as ice
remaining on the water plate surface.
Eliminate obstruction. Adjust the
evaporator temperature probe so all
ice is out of the evaporator before
the water plate begins to close.
Water plate closes
but re-opens before
water fill is
completed.
Water plate springs are stretched or
weak and allow the water plate to
drop slightly as the water fills the
tank. The "water plate up" switch
lever is allowed to drop and re-open
the water plate.
Replace defective springs.
A water plate spring is broken or
disconnected from the cam arm or
the water plate.
Replace broken spring or reattach
disconnected spring.