Service manual

Service Diagnosis
SYMPTOM POSSIBLE CAUSE PROBABLE FIX
No ice is made No cooling due to low refrigerant
charge
Locate leak, recover remaining
refrigerant, replace dryer,
evacuate and weigh in nameplate
charge.
Will not harvest due to hot gas
valve not opening.
Check for voltage to coil in
harvest, if there is voltage check
coil, if coil is ok, replace hot gas
valve
No cooling due to compressor not
operating
Check compressor for voltage,
continuity, and operation. Replace
if found to be faulty.
Will not harvest due to not
enough harvest time.
Adjust harvest time longer.
Will not harvest due to lack of
water.
Check water supply & distribution
system. Clean water system with
Scotsman Ice Machine Cleaner.
Makes ice, but very little High discharge pressure, due to
dirty condenser, faulty fan motor,
fan pressure switch, not enough
water thru water cooled
condenser.
Check for causes of high
discharge pressure and correct.
Inlet water temperatures and
room ambient very high
Advise user, suggest additional
room cooling.
Compressor inefficient Check/replace compressor
Cubes are wrong size/shape Cube size control not adjusted
properly
Adjust cube size control
Water system is restricted with
minerals
Clean water system with
Scotsman Ice Machine Cleaner
Not enough water Check water supply pressure
Check water supply for restrictions
Ice fused together in bin Ice in bin too long Advise user to pour water on ice
to ease removal
Too many minerals in water Suggest water treatment to user.
Water drips on ice Water distributors loose Set water distributors in place on
top of evaporator.
Some water is normal. Advise user.
Cube size too small Adjust thicker.
Water system is dirty Clean water system with ice
machine cleaner.
CM500
December, 1992
Page 19