CH1001-A Chiller Operator’s & Installation Manual
© 2002-2010, IMI Cornelius Inc. - 7 - Publication Number: 620914301
Pump does not operate, but Power
Light is “ON”.
A. Line to or from chiller is
restricted.
B. Internal or external filter is
blocked with debris.
C. Pump contactor is defective.
D. Damaged pump motor or impel-
ler.
A. Inspect lines and remove any
obstructions.
B. Remove and clean strainer,
then replace.
C. Replace contactor.
D. Replace pump motor or impel-
ler.
Unit runs continuously, but is not
cooling process water enough.
A. Condenser is restricted.
B. Unit low on refrigerant.
C. Inefficient compressor.
D. Unit is undersized for applica-
tion.
E. Bypass gas valve stuck open.
A. Clean condenser.
B. Call service
C. Call service.
D. Call Cornelius chiller sales rep.
E. Replace solenoid valve.
Chiller does not operate, but power
light is “ON” and red safety light is
“ON”.
A. Unit is operating under high
pressure conditions.
B. Unit is operating under low tem-
perature conditions.
C. Unit has experienced low flow
condition.
A. Check for dirty condenser fins
or obstruction of chiller air
intake. Press high pressure
manual reset switch. If this
problem persist, contact Corne-
lius Service Department.
B. Low or now process water flow.
Ensure that there is adequate flow
through the system plumbing.
OR
Process water is too cold, below
35° F. Increase thermostat set-
ting or bypass valve stuck open.
Replace solenoid valve. Check
for proper voltage.
OR
Defective thermostat, replace.
C. Check for obstruction in process
water line plumbing.
NOTE: When servicing a Cornelius chiller, it is important to note all information provided on the
DATA PLATE located on the upper rear of the unit. If technical assistance is needed, the Cornelius
Service Technician will need this information along with any description of the problem(s) you are
encountering. The serial no. and other information will also be required when ordering replacement
parts and any other Warranty Claims.
Trouble Problem Cause Remedy
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