Service Diagnosis
No ice
Problem Likely Cause Probable Solution
No power to unit Power disconnected
Check breaker or fuse. Reset or
replace, restart and check
No power to controller
Transformer open Replace transformer
ON-OFF Switch open or set at OFF Switch to ON or replaced switch
Shut down on maximum
water fill time
Water shut off Restore water supply
Shut down on maximum
freeze time
Water leak
Check purge valve, curtain, sump,
pump hose
Air filter clogged Clean air filter
Dirty condenser Clean condenser
Restricted location, intake air too
hot
Have machine moved
Ice thickness sensor dirty or
disconnected
Check ice thickness sensor probe
Water distributor dirty
Remove and clean water
distributor
Inlet water valve leaks through
during freeze
Check inlet water valve
Connected to hot water
Check for bleed thru from / missing
check valve in building water
supply
Incomplete harvest Check harvest system
High pressure cut out opened
Air cooled ,check fan motor
pressure control, check fan motor,
check controller using test mode
Water cooled, check for water
interruption
Fan motor pressure control open Check fan pressure control
Fan motor not turning
Check fan motor, check fan blade,
check controller using test mode
Water pump not pumping
Check pump motor, check
controller using test mode
May 2008
Page 28
CU1526, CU2026, CU3030
Service Manual
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