Cornelius Ice Machine Manual and Troubleshooting Guide for 500 Series

- 21 -

Publication Number: 630460174SER

TROUBLESHOOTING CHART - ICEMAKER NOT OPERATING

NO POWER

ICEMAKER RUNS BUT

LOW WATER SAFETY

ICEMAKER OPERATING BUT

GEARMOTOR OVERLOAD

DOES NOT MAKE ICE

SWITCH OPEN

SOFT ICE

TRIPPED

Remote condenser

Condenser fan running

Check electrical wiring in con

units only

Check water level control

but compressor not running

and evaporator water tube

trol box for loose connec

Check bin switch

for lime build up restriction.

tions.

Check line voltage.

Check for failed service

Remote condenser

Check that water is turned on.

switch or relay.

not running.

Check compressor winding

Check for restriction in water line.

Check power to machine.

& components.

Check incoming water pressure

Yes

(minimum 10 lbs.).

Yes

Check water safety switch.

Evaporator water tube

High pressure

Check electrical

Check power

may have an air bubble.

Clean all related

Refer to guide

CAUTION

CLEAN

Clear air bubble from

switch open or

wiring in control box

to condenser.

tube.

drain lines.

to Good Ice in

Clear ice from

see

cycling on and off.

for loose connections.

High suction pressure

Low suction pressure

service manual.

evaporator and

instructions.

(30 lbs. or above).

(20 lbs. or below).

auger before re

setting over

load.

Head

TXV not

Suction line

TXV bulb

Reset

overload.

Pressure

operating

not

lost charge.

high.

properly.

insulated.

Discharge

Non-condensible

Too much

Condenser

king valve

in system.

refrigerant in

fan not

dirty or

Valve

Bulb

Replace valve

partially

system.

running.

restricted.

stuck

loose.

uninsulated.

closed.

evacuate and

Icemaker runs

Reset but

Will not

open.

recharge.

motor does

reset.

Replace

Clean

Clean and

not run.

valve.

and

insulate.

Open

Evacuate and

Check electrical circuit

tighten.

IMPORTANT

Short run trips

Check

Overload

recharge system.

to fan motor.

Icemaker runs when reset

again in 2 min

gearmotor

hot try

valve

Clean condenser.

Check fan motor.

but problem has not been

utes. Check gear

circuit.

again.

found.

motor circuit.

Continue checking for

Low pressure switch open

overload as follows to

guard against future

or cycling on and off.

problems

Will not

reset

replace

overload

Low on

Remote condenser

Plugged

Restricted

Plugged or

Icemaker

refrigerant.

units only

liquid line

liquid line.

faulty TXV.

froze up.

dryer.

Check for

LAC not operating

Replace

Check for

Replace

Check if

leaks.

properly (minimum

dryer.

kinks or

valve.

auger is

OVERLOAD GUIDE

discharge pressure

Evacuate

damage to

Evacuate

turning.

ELECTRICAL

180 lbs.).

and

liquid line.

and

High or low voltage weak power lines can cause overloads on icemaker restarts

recharge

High running current. Check motor circuits and start relay - Auger delay failed.

system.

ICEMAKER

Mechanical parts worn. Scored evaporator or auger. Worn thrust bearing.

Ice maker not turning off. Failed ice level control.

Over compression. Low water inlet temperature. Restriction in water line from

reservoir.

REFRIGERANT

Replace LAC valve,

Contaminated charge or bad compressor.

Low charge or gas leak.

evacuate and

Low suction pressure. Improper expansion valve sensing bulb. Location or insulation

recharge system.

and/or defective expansion valve


Check drive on	Check gears in	Check if extruding
gearmotor.	gearbox.	head is down in
		evaporator tube.

TROUBLESHOOTING

Continuous Flow Icemaker Service Manual