Motor overload relays or circuit breakers open
a) Low voltage during high load conditions
a) Check supply voltage for excessive line drop
b) Defective or grounded wiring in motor or
power circuits
b) Replace compressor motor
c) Loose power wiring
c) Check all connections and tighten
d) High condensing temperature
d) See Corrective Steps for high discharge pressure
e) Power line fault causing unbalanced voltage
e) Check supply voltage. Notify power company. Do not
start until fault is corrected
f) High ambient temperature around the
overload relay
f) Provide ventilation to reduce heat
g) Failure of second starter to pull in on part-
winding start system
g) Repair of replace starter or time delay mechanism
Compressor thermal protector switch open
a) Operating beyond design conditions
a) Add facilities so that conditions are within allowable
limits
b) Discharge valve partially shut
b) Open valve
c) Blown valve plate gasket
c) Replace gasket
Freeze protection opens
a) Thermostat set too low
a) Reset to 40 F or above
b) Low water flow
b) Adjust gpm.
c) Low suction pressure
c) See "Low Suction Pressure"
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REMOTE CONDENSER MODELS
