
CH Series Chiller Operator’s & Installation Manual
© 2002-2010, IMI Cornelius Inc. - 5 - Publication Number: 91256
TROUBLESHOOTING
Trouble Problem Cause Remedy
Chiller does not operate, Power
Light “OFF”
A. No Power to unit
B. Loose or poor wire connection
C. Defective Control Power Switch
D. Overload device open.
E. Inoperable relay.
F. Low input voltage
A. Check main disconnect fuses,
wiring and power lead to unit.
B. Check wiring. Correct loose or
poor wire connection
C. Replace Switch
D. Allow compressor to cool, then
install new overload device;
replace compressor if necessary.
E. Replace relay.
F. Nominal voltage +/- 10% is
required.
No Circulation of Chilled Water
A. Line to or from chiller is
restricted.
B. Low water level.
C. Inoperable pump.
A. Inspect lines and remove any
obstructions.
B. Ensure that tank is full.
C. Check for obstruction or binding
impeller., replace pump and/or
motor, if necessary.
Inadequate Cooling
A. Condenser is restricted.
B. Fan motor not operating freely.
C. Water not circulating
D. Unit low on refrigerant.
E. Inoperative temperature control.
A. Clean condenser.
B. Replace fan blade and/or motor
if necessary.
C. See “No Circulation of Chilled
Water”
D. Charge system with refrigerant.
E. Replace thermostat.
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