Troubleshooting - Cornelius 1000 - Series Service Manual

NO POWER
Remote condenser
units only
Check electrical wiring in con
trol box for loose connec
tions.
Check for failed service
Remote condenser
switch or relay.
not running.
Check power to machine.
High pressure Check electrical Check power
switch open or wiring in control box to condenser.
cycling on and off. for loose connections.
Discharge Non-condensible Too much Condenser
king valve in system. refrigerant in fan not
partially system. running.
closed.
Evacuate and
Check electrical circuit
Open recharge system.
to fan motor.
valve Clean condenser.
Check fan motor.
Low pressure switch open
or cycling on and off.
Remote condenser
Low on
units only
refrigerant.
Check for LAC not operating
leaks. properly (minimum
discharge pressure
180 lbs.).
Replace LAC valve,
evacuate and
recharge system.
TROUBLESHOOTING CHART - ICEMAKER NOT OPERATING
LOW WATER SAFETY
ICEMAKER RUNS BUT
SWITCH OPEN
DOES NOT MAKE ICE
Condenser fan running
but compressor not running
Check line voltage.
Check that water is turned on.
Check compressor winding
Check for restriction in water line.
& components.
Check incoming water pressure
(minimum 10 lbs.).
Check water safety switch.
Evaporator water tube
may have an air bubble.
Clear air bubble from
tube.
High suction pressure
(30 lbs. or above).
Head TXV not
Pressure operating
high. properly.
Condenser
dirty or
Valve Bulb
restricted.
stuck loose.
open.
Replace Clean
valve. and
tighten.
Plugged
Restricted
Plugged or Icemaker
liquid line
liquid line.
faulty TXV. froze up.
dryer.
Check if
Replace Check for Replace
auger is
dryer. kinks or valve.
turning.
Evacuate damage to Evacuate
and liquid line. and
recharge recharge
system. system.
No
Check drive on Check gears in
gearmotor. gearbox.
ICEMAKER OPERATING BUT
SOFT ICE
Check bin switch
Yes
Clean all related
drain lines.
Low suction pressure
(20 lbs. or below).
Suction line
TXV bulb
not
lost charge.
insulated.
Bulb
Replace valve
uninsulated.
evacuate and
recharge.
Clean and
insulate.
IMPORTANT
Icemaker runs when reset
but problem has not been
found.
Continue checking for
overload as follows to
guard against future
problems
OVERLOAD GUIDE
ELECTRICAL
High or low voltage weak power lines can cause overloads on icemaker restarts
High running current. Check motor circuits and start relay - Auger delay failed.
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
Contaminated charge or bad compressor.
Low charge or gas leak.
Low suction pressure. Improper expansion valve sensing bulb. Location or insulation
and/or defective expansion valve
Check if extruding
head is down in
evaporator tube.
GEARMOTOR OVERLOAD
TRIPPED
Check water level control
and evaporator water tube
for lime build up restriction.
No
No
Yes
Refer to guide CAUTION
CLEAN
to Good Ice in Clear ice from
see
service manual. evaporator and
instructions.
auger before re
setting over
load.
Reset
overload.
Icemaker runs
Reset but Will not
motor does reset.
not run.
Short run trips Check Overload
again in 2 min gearmotor hot try
utes. Check gear circuit. again.
motor circuit.
Will not
reset
replace
overload