Cornelius 700 - Series User Manual
Page 25
Con
tin
uou
s F
low Ic
em
ak
er
S
e
rv
ic
e
Ma
nual
© 20
04-2005,
I
M
I Corne
lius
In
c.
-
21 -
P
ubl
ic
at
ion N
u
mber:
6
30460174SE
R
T
R
O
U
B
L
ESHOOT
ING
TROUBLESHOOTING CHART - ICEMAKER NOT OPERATING
NO POWER
Check electrical wiring in con
trol box for loose connec
tions.
Check for failed service
switch or relay.
Check power to machine.
ICEMAKER RUNS BUT
DOES NOT MAKE ICE
Condenser fan running
but compressor not running
Check line voltage.
Check compressor winding
& components.
LOW WATER SAFETY
SWITCH OPEN
Remote condenser
not running.
Evaporator water tube
may have an air bubble.
Clear air bubble from
tube.
Check power
to condenser.
Check electrical
wiring in control box
for loose connections.
High pressure
switch open or
cycling on and off.
Check that water is turned on.
Check for restriction in water line.
Check incoming water pressure
(minimum 10 lbs.).
Check water safety switch.
ICEMAKER OPERATING BUT
SOFT ICE
Check bin switch
Clean all related
drain lines.
Refer to guide
to Good Ice in
service manual.
GEARMOTOR OVERLOAD
TRIPPED
Check water level control
and evaporator water tube
for lime build up restriction.
CAUTION
Clear ice from
evaporator and
auger before re
setting over
load.
CLEAN
see
instructions.
Reset
overload.
Icemaker runs
Reset but
motor does
not run.
Will not
reset.
Overload
hot try
again.
Will not
reset
replace
overload
Check
gearmotor
circuit.
Short run trips
again in 2 min
utes. Check gear
motor circuit.
IMPORTANT
Icemaker runs when reset
but problem has not been
found.
Continue checking for
overload as follows to
guard against future
problems
Low suction pressure
(20 lbs. or below).
TXV bulb
lost charge.
Replace valve
evacuate and
recharge.
High suction pressure
(30 lbs. or above).
Suction line
not
insulated.
Bulb
uninsulated.
Clean and
insulate.
TXV not
operating
properly.
Bulb
loose.
Clean
and
tighten.
Head
Pressure
high.
Valve
stuck
open.
Replace
valve.
Condenser
dirty or
restricted.
Condenser
fan not
running.
Too much
refrigerant in
system.
Non-condensible
in system.
Discharge
king valve
partially
closed.
Open
valve
Evacuate and
recharge system.
Clean condenser.
Check electrical circuit
to fan motor.
Check fan motor.
Low pressure switch open
or cycling on and off.
Low on
refrigerant.
Plugged
liquid line
dryer.
Restricted
liquid line.
Plugged or
faulty TXV.
Icemaker
froze up.
Check if
auger is
turning.
Replace
valve.
Evacuate
and
recharge
system.
Check for
kinks or
damage to
liquid line.
Replace
dryer.
Evacuate
and
recharge
system.
LAC not operating
properly (minimum
discharge pressure
180 lbs.).
Check for
leaks.
Replace LAC valve,
evacuate and
recharge system.
Check drive on
gearmotor.
Check gears in
gearbox.
Check if extruding
head is down in
evaporator tube.
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
No
Remote condenser
units only
Remote condenser
units only
No
Yes
Yes
No