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TROUBLESHOOTING
WARNING: Disconnect electrical power to the Chiller to prevent personal injury before
attempting any internal maintenance. Only qualified personnel should service internal
components or electrical wiring.
TROUBLE PROBABLE CAUSE REMEDY
CHILLER DOES NOT
OPERATE, CONTROL
POWER LIGHT “OFF”
A. No Power To Unit. A. Check Main disconnect fuses,
wiring, and power lead to unit.
B. Defective Control Power
Switch.
B. Replace Switch
C. Defective Control Transformer. C. Replace Transformer
D. Wrong Voltage Supplied to
Unit.
D. Supplied Voltage Must be within
± 10% of nameplate rating.
E. 3--Phase Monitor tripped. E. Check for correct voltage level on
each phase of incoming 3--phase
power. Check for correct phase
rotation.
PUMP DOES NOT OPERATE,
BUT COOLING LIGHT IS
”ON”.
A. Line to or from Chiller is
restricted.
A. Inspect lines and remove any
obstructions.
B. Internal or external filter is
blocked with debris.
B. Remove filter, back-flush, and
replace.
C. Pump Contactor is
defective.
C. Replace.
D. Damaged pump motor or
impeller.
D. Replace pump motor or impeller.
CHILLER DOES NOT COOL,
AND COOLING LIGHT IS
”OFF”.
A. Thermostat is defective. A. Replace Thermostat
PUMP RUNS, COMPRESSOR
”SHORT CYCLES”.
A. No process load on
chiller.
A. Increase process load.
B. Refrigerant is low. B. Check refrigerant charge.
UNIT RUNS CONTINUOUSLY,
BUT IS NOT COOLING
PROCESS LIQUID ENOUGH.
A. Condenser is restricted. A. Clean condenser.
B. Unit low on refrigerant. B. Call Service.
C. Inefficient compressor. C. Call Service.
D. Unit is undersized for
application.
D. Call REMCOR Chiller Sales Rep.