CH Series Chiller Operator’s & Installation Manual
Publication Number: 620914801
- 6 -
© 1999-2010, IMI Cornelius Inc.
TROUBLESHOOTING
Trouble
Problem Cause
Remedy
Chiller does not operate, Power
Light “OFF”
A. No Power to unit
B. Defective Control Power Switch
C. Defective Control Transformer
D. Wrong Voltage supplied to Unit
A. Check main disconnect fuses,
wiring and power lead to unit.
B. Replace Switch
C. Replace Transformer
D. Supplied Voltage MUST be
/- 10% of nameplate rat-
ing
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.
A. Clean condenser.
B. Call Service.
C. Call Service.
D. Call Cornelius Chiller Sales
Rep.
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.
WARNING: Disconnect electrical power to the chiller to prevent personal injury before
attempting any internal maintenance. Only qualified personnel should service the internal
components or electrical wiring.
If repairs to the chiller must be made, disconnect electrical power to the unit, then shut off
the water source.
