Scotsman MAR1400 - Manual (Page 32)

Service Diagnosis
The Service Diagnosis Section is for use in aiding
the servicemen in diagnosing a particular problem
for pin-pointing the area in which the problems
lines, thus an ever available reference for proper
corrective action.
The following chart lists corrective actions for the
causes of known symptoms of certain problems
that can occur in the ice making refrigeration
system.
MAR1400 & MAR2000
December 2000
Page 32
SYMPTOM POSSIBLE CAUSE CORRECTION
Lo-refrigerant press.
Incorrect refrigerant suction pressure
Add refrigerant to raise suction
pressure.
Raise head press. Control setting.
Moisture in system. Overcharge of oil
in system.
Check moisture indicator and
remove charge and drier. Replace
& recharge the system.
Not enough refrigerant. Check for refrigerant leak.
Lo-water level.
Intermittent water supply or too low
water pressure.
Water shut-off valve closed. Check
and clean water strainer.
The compressor runs but the unit
does not make ice.
Drive motor gear reducer
inoperative.
Check. Repair or replace.
V-belt loose or broken Check. Repair or replace.
Key may sheared. Check. Repair or replace.
Gear reducer with one gear
stripped - off.
Check. Repair or replace.
Pulley loose on motor shaft. Check. Repair or replace.
Water not entering reservoir.
Check and clean. Water float valve
to be cleaned.
Excessive Hi-pressure Hi-pressure unit operation
Check cooling water at
condenser.Condenser tube
clogged-up. Water regulating valve to
be re-adjusted.