Ice-O-Matic GEMU090 Series, Service Manual, Page: 12 / 25

Service Diagnosis
Page 10
GEMU090
Service
Problem Likely Cause Probable Solution
No ice, continued
Ice level sensor failure
With power on and Ice Making light on,
check connector, if secure jump the two
middle pins at J2 (bin stat)on the
controller together. Unit should start. If it
does, replace the sensor, if not, replace
the controller.
Auger motor on but compressor and fan
motor are off.
Restart unit. Check for power to
compressor and/or fan motor. If none,
replace controller.
Ice Making light blinking. Condition is
temporary, unit has been switched off.
Ice making light on, nothing operating. May be in a restart window. See page 7.
Not keeping up, makes
ice but less than normal
Dirty condenser Vacuum condenser fins
Air flow blocked Check for vent blockage
Gravity drain restricted
Check drain, clear of restriction. Ensure
it has a proper air vent.
Pump drain slow
Check for proper pump switch operation
and drainage
Scale on evaporator and auger
Clean with scale remover. See
Maintenance section.
Torn door gasket, door does not close
tightly
Check gasket and door fit.
Makes ice but also an
unusual noise
Panels vibrating Check panels, adjust fit, tighten screws
Fan blade rubbing
Check fan blade for foreign object.
Remove same. Check alignment.
Scale on evaporator and auger
Clean with scale remover. See
Maintenance section.
Drain pump cuts in and out. Check valve failure, replace.
Tubes rubbing
Check for tube contact to panel or
another tube.
Unit in very cold conditions Do not operate unit below limits
Water Leak
Drain tube off or cracked Check/repair drain tube
Water inlet connection loose Check/tighten connection
Water flows continuously Float valve not shutting off
Check float, if stuck free it. If leaking by
when full, replace the valve.