Follett Symphony 25HI400A, Инструкция по установке, эксплуатации и обслуживанию

Страница: 32 / 48

32 25CI400A/W • 25HI400A • 50CI400A/W • 50HI400A
Icemaker troubleshooting
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 Indicators Corrective Action
Icemaker will not run.
System status: compressor,
gearmotor, and fan motor
inoperative.
1. No power to unit.
2. Open bin level control.
3. Water OK LED (WTR) not on.
4. 20M or 2ND LED is on indicating that fi rst or
second torque error has occurred.
5. Gear motor locked up (immediate torque error
indicated by LEDs when board is reset).
6. Open coil on gearmotor start relay causing an
immediate torque error.
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 gearmotor.
6. Replace gearmotor start relay.
Compressor will not run.
System status: gearmotor
and fan motor run.
1. Condenser coil plugged causing open overload or
high pressure cut-out.
2. Defective starting capacitor.
3. Defective starting relay.
4. Open motor winding.
5. No power output from compressor output terminal
on control board.
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.
Unit cycles intermittently.
System status: compressor,
gearmotor, and fan motor
cycle.
1. Float reservoir running dry, sensing probe
signalling for system to shut down.
1. Check water supply to fl oat and fl oat operation. PC
board will have fl ashing WTR LED.
Low ice production.
Poor quality ice.
1. Dirty air fi lter or condenser coil.
2. Restricted air fl ow to condenser coil.
3. Mineral coated evaporator.
4. Improper exhaust air provisions.
5. Faulty expansion valve.
6. Low refrigerant charge.
7. Superheat incorrect.
8. Inefficient compressor.
1. Clean or replace fi lter, 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 TXV sensing bulb is securely clamped in
place and not damaged; check that insulated bulb
cover is in place.
8. Replace compressor.
Water leaks from bottom of
evaporator. 1. O ring seal broken. 1. Replace O ring.
Icemaker runs for short
period of time and shuts
down on torque error.
System status: 20M or 2nd
LED is lit.
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. Eliminate kink and check that tube routing complies
with Follett icemaker installation manual.
2. Adjust or replace control.
3. Replace complete length 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.
Evaporator is iced up on the
outside. No ice production.
System status: compressor,
gearmotor and fan motor
running.
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. 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.