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Troubleshooting
COMPRESSOR
THE OUTLET WATER
STOPS DUE TO OPERA-
TION OF THE HIGH PRES-
TEMPERATURE EXCEEDS
THE SET VALUE
no
EXCESSIVE
WATER FLOW,
HIGH THERMAL
LOAD
yes
REDUCE THE FLOW
RATE OF THEWATER TO BE
COOLED
HIGH
AMBIENT
TEMPERATURE
yes
RETURN THE
AMBIENT
TEMPERATURE TO
BELOW THE
SPECIFIED LIMIT
FAULT
COMPRESSOR STOPS
DUE
TO OPERATION OF THE
SURE
LOW PRESSURE SWITCH
SWITCH
no
PRESSURE SWITCH BROKEN OR
INCORRECTLY CALIBRATED
yes
REPLACE
PRESSURE
SWITCH
no
no
CONDENSER
FINS
DIRTY
yes
CLEAN THE
FINS OF THE
CONDENSER
PCW420-650
REMEDY
CAUSE
no
no
REFRIGE---
INSUFFICIENT
RANT FILTER
WATER FLOW
CLOGGED
yes
yes
INCREASE
THE FLOW
RENEW
RATE OF THE
THE FILTER
FLUID TO BE
COOLED
no
CONDENSER
FAN ROTATES
SURFACES
BACKWARDS
CLOGGED
yes
yes
SWAP OVER
CLEAR THE FRONT
THE
SURFACE OF THE
PHASEWIRES
CONDENSER
COMPRESSOR SUC-
TION, LIQUID LINE
FROSTED
THERMOSTATIC
no
THERMOSTATIC
VALVE
BULB
INCORRECTLY
DISCHARGED
CALIBRATED
yes
yes
no
RECALI-
RENEW
BRATE
THE VALVE
THE VALVE
LEAKS IN CIRCUIT,
SYSTEM DISCHARGED
yes
CHECK FOR
LEAKS, REPAIR,
CHARGE THE
CIRCUIT
10/10
THE COMPRESSOR
RUNS FOR LONG PERI-
ODS, IS NOISY
COMPRESSOR
COMPONENTS
DETERIORATED
yes
no
REPAIR OR
REPLACE
COMPRESSOR
no
REFRIGERANT
FILTER
CLOGGED
yes
RENEW
THE FILTER
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