Scotsman MAR 106, Service Manual

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SYMPTON POSSYBLE CAUSE CORRECTION
Excessive noise. Misaligned V-belt. Aligne V-belt.
Gear reducer loose on frame. Tighten.
Drive motor end-play or worm Repair or replace.
bearings.
Motor compressor not Loosen hold-down bolts.
floating on rubber cushions.
Water level in evaporator Set water level as shown
drum basin too low. on page 27.
Excessive vibration. Ice formation underneath Remove blade amd melt-up
blade-frictioning against ice formation.
rotating drum. Adjust water level as shown
on page 27.
Compressor cycles Water regulating valve too close. Open water valve.
AEV valve closed. Adjust.
Non-condensable gases in sustem. Purge-off.
Making wet ice Surrounging air temperature Correct or move unit to cooled
above 40
°
C (100
°
F) 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 Check and recharge with
or overcharge of refrigerant. proper amount of refrigerant.
Plugged condenser water tubes. Clean condensor.
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.
Light glows- Evaporator - drum speed very Gear Reducer shaft's fiber key
Evaporator - drum doesn't turn low - 1/4 rotation in more then 40" breakage.
(ice maker OFF).
V belt slipping
Effect hall sensor failure.
Effect hall magnetic pins
demagnetized.
Light glows- Wrong power voltage cable Interchange phases plug IN.
Wrong 3 phases monitoring wiring.
relay cut out.
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