Service Diagnosis - Scotsman CME1002W User Manual

CME865W & CME1002W

SERVICE DIAGNOSIS

SYMPTOM
No ice, machine does not run
No ice, compressor does not run,
rest of ice machine does.
No ice, no water over evaporators 1. Water pump does not pump
No ice, everything runs
Low ice production
POSSIBLE CAUSE
1. No electrical power
2. Circuit breaker tripped or fuse
blown
3. High pressure control open.
4. ice level control holding
machine off
5. High temp. cut out open
6. Timer switch open
7. Master switch open
8. Circuit board open
1. Open contactor coil
2. No water in reservoir
1. Too much heat load
2. Low on refrigerant
3. Suction pressure too high
1. Too much heat load.
2. Compressor inefficient.
3. Non condensable gasses in
refrigeration system.
December, 1994
Page 20
PROBABLE CORRECTION
1. Restore power
2. Reset breaker or replace fuse,
check for electrical fault.
3. Reset HPC, check water
supply to water cooled condenser.
4. Check ice level control circuit.
5. Hot gas valve leaks thru,
replace hot gas valve
6. Replace timer
7. Check or replace switch.
8. Replace circuit board.
1. Replace contactor
1. Check/replace water pump
2. Check/replace water inlet valve.
1. Check for slow leak thru of
water inlet valve.
2. Check pressures, if low
find/repair leak; weigh in charge.
3. Defective compressor - replace
1. Check water temperature.
2. Replace compressor
3. Check head pressure or water
flow, if very high, and no other
reason is suspected, replace
refrigerant charge.