Service diagnosis 33, Service diagnosis – Scotsman MAR1400 User Manual
Page 33
Service Diagnosis
REFRIGERATION SYSTEM
MAR101 & MAR121
December 2000
Page 33
SYMPTOM
POSSIBLE CAUSE
CORRECTION
Unit will not run.
Blown fuse.
Replace fuse and check for cause
of blow fuse.
Loose electrical connection.
Check wiring.
Switch in OFF position.
Turn switch to ON.
Inoperative master switch.
Replace switch.
Spout switch cut-out.
Check ice chute arrangement.
Excessive noise
Misaligned V-belt.
Align V-belt.
Gear reducer loose on frame.
Tighten.
Drive motor end-play or worn
bearings.
Repair or replace.
Excessive vibration.
Ice formation underneath
blade -
frictioning against rotating drum.
Remove blade and melt-up ice
formation. Lower water level to
correct value.
Making wet ice
Surrounding air temperature
above
40EC (100EF)
Correct or move unit to cooled
location.
Under-or-over-charge of refrigerant. Re-charge with proper amount.
Closed AEV.
Adjust valve for correct refrigerant
flow.
Faulty compressor valve plate.
Repair or replace.
Low ice production.
Loss of refrigerant,under
or overcharge of refrigerant
Check and recharge with proper
amount of refrigerant.
Plugged condenser water tubes
Clean condenser.
Low water level in the reservoir.
Check float valve operation.
Overcharge of oil in system.
Check at oil sight glass.
Lower to 1/2
sight glass.
Water pump out of operation.
Replace water pump.
Spray bar clogged.
Clean spray bar.