Icemaker Troubleshooting - Follett C/E12CI400A Installation, Operation & Service Manual

Icemaker troubleshooting chart
• Flashing water LED at any time indicates that water signal to board had been lost for more than one second.
• Ten-second delay: There is a 10 second delay in reaction to loss of water (WTR) or bin (B-E) signals. If signals are not
lost for more than 10 seconds, no reaction will occur.
Problem
1. Icemaker will
2. Open bin level control.
not run.
3. Water OK LED (WTR) not on.
System status:
4. 20M or 2ND LED is on indicating
compressor,
gearmotor,
and fan motor
5. Gear motor locked up (immediate
inoperative.
6. Open coil on gearmotor start relay
2. Compressor will
not run.
2. Defective starting capacitor.
System status:
3. Defective starting relay.
gearmotor and
4. Open motor winding.
fan motor run.
5. No power output from compressor
3. Unit cycles
intermittently.
System status:
compressor,
gear motor, and
fan motor cycle.
4. Low ice
2. Restricted air flow to condenser coil.
production.
3. Mineral coated evaporator.
Poor quality ice.
4. Improper exhaust air provisions.
5. Faulty expansion valve.
6. Low refrigerant charge.
8. Inefficient compressor.
5. Water leaks
from bottom of
evaporator.
Indicators/possible cause
1. No power to unit.
that first or second torque error has
occurred.
torque error indicated by LEDs when
board is reset).
causing an immediate torque error.
1. Condenser coil plugged causing open
overload or high pressure cut-out.
output terminal on control board.
1. Float reservoir running dry, sensing
probe signalling for system to shut
down.
1. Dirty condenser coil.
7. Superheat incorrect.
1. O ring seal broken.
1. Check that unit is plugged in, circuit
breakers are on.
2. Adjust or replace ice level control.
3. Check reservoir for water, restore water
to unit.
4. See #6 below.
5. Repair or replace gear motor.
6. Replace gearmotor start relay.
1. Clean condenser coil and replace
overload if necessary.
2. Replace start capacitor.
3. Replace relay.
4. Ohm out windings and replace
compressor if necessary.
5. Check terminal connection and replace
control board if necessary.
1. Check water supply to float and float
operation. PC board will have flashing
WTR LED.
1. Clean condenser.
2. Remove obstruction.
3. Clean evaporator.
4. Provide proper exhaust air provisions per
Follett installation manual.
5. Replace expansion valve.
6. Check for leaks; repair, evacuate, and
weigh in correct charge.
7. Check that TEV sensing bulb is securely
clamped in place and not damaged;
check that insulated bulb cover is in
place.
8. Replace compressor.
1. Replace O ring.
26
Corrective action