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SMC Series Chillers
Problem Possible cause Solution
Refrigerant is low. Check the refrigerant charge.
Pressure switch contacts are
open.
Sight glass should be clear
while compressor runs. Call
for service if bubbling or
foaming.
Refrigerant high pressure
cutout switch contacts are
open.
Check for dirty condenser.
Check for condenser air
obstruction.
Defective fan motor. Repair or replace.
Compressor internal overload
is open. Allow time to cool
and reset.
Check for high/low voltage.
Must be within plus or minus
10% of the nameplate rating.
Check for poor compressor
electrical connections.
Pump runs, compressor will
not.
Broken wire in the
compressor control circuit.
Locate and repair.
Restricted condenser airflow. Clean the condenser.
Unit low on refrigerant. Call Service.
Inefficient compressor. Call Service.
Unit runs continuously, but
not enough cooling power.
Unit undersized for
application.
Call Sales Representative.