Follett 12 Series Installation, Operation And Service Manual page 27

Icemaker troubleshooting chart
Problem
6. Icemaker runs
for short period
of time and shuts
down on torque
error.
System status:
20M or 2nd LED
are lit.
7. Evaporator is
iced up on the
outside. No ice
production.
System status:
compressor,
gearmotor
and fan motor
running.
8. Compressor
cycles
intermittently.
System status:
gearmotor and
fan motor run.
9. Unit runs but not
making ice.
System status:
compressor,
gearmotor & fan
motor running.
10. Compressor and
fan motor will not
run. Gearmotor
runs.
11. Intermittent
noises from
evaporator.
Indicators/possible cause
1. Kink in ice transport tube.
2. Bin level control remains in closed
position.
3. Ice transport tube ruptured internally.
4. Worn evaporator bearings.
5. Faulty gearmotor start relay. Icemaker
torques out within 5 seconds of start-up.
6. Torque out occurs when storage bin fi lls
to capacity.
1. Gearmotor running but no output
rotation.
2. Float reservoir empty.
3. Air bubble in water supply line. Water in
reservoir but not in evaporator.
1. High pressure cut-out open due to high
head pressure.
2. Clogged or dirty condenser coil.
3. Improper ventilation.
4. Defective compressor.
1. Clogged or dirty condenser coil.
2. Compressor not pumping.
3. Low refrigerant charge.
1. Compressor switch in OFF position.
2. No output on compressor and fan motor
terminals on control board.
3. Failed fan motor causes high pressure
cut-out to open.
1. Mineral build-up on evaporator surface.
1. Eliminate kink and check that tube
routing complies with Follett icemaker
installation manual.
2. Adjust or replace control.
3. Replace complete run of ice transport
tube.
4. Inspect bearings for roughness or
binding and replace if necessary.
5. Replace gearmotor start relay.
6. Ensure that ice contacts bin thermostat
before backing ice up in transport tube.
Refer to dispenser manual for proper
thermostat and ice tube mounting.
1. Check for broken gearmotor output shaft
or damaged gearbox.
2. Check for defective water sensor (water
OK (WTR) LED remains on even when
fl oat empty or probe removed from
water).
3. Purge air from line.
1 Check discharge pressure and adjust
water regulator valve.
2. Clean condenser coil.
3. Provide inlet and exhaust air provisions
per Follett icemaker installation manual.
4. Replace compressor.
1. Clean condenser coil.
2. Replace compressor.
3. Check for leaks; repair, evacuate, and
weigh in correct charge.
1. Turn compressor switch on.
2. Replace control board.
3. Replace fan motor.
1. Clean evaporator with liquid IM cleaner.
27
Corrective action