SYSTEMP – Installation Operation Manual (IOM SYSTEMP rev.N)

Table Of Contents
112
16.2 PROBLEMS WITH DIRECT EXPANSION COOLING CIRCUIT
NO COOLING
HIGH AIR FLOW RATE CHECK FAN SETTINGS
NOISY COMPRESSOR
NO OIL
VERY LOW SUCTION
TEMPERATURE
MOTOR SHAFT
BEARINGS WORN OR
DAMAGED
INCORRECT DIRECTION
OF ROTATION
CHECK CIRCUIT AND
ADD OIL IF NECESSARY
CHECK EXPANSION
VALVE
REPLACE COMPRESSOR
CHECK CORRECT
POWER PHASE
SEQUENCE
NO ELECTRICAL POWER
SUPPLY
NO CONTROL SIGNAL
MECHANICAL FAULT
ELECTRICAL FAULT
CHECK ELECTRICAL
POWER SUPPLY CIRCUIT
CHECK ELECTRONIC
CONTROL BOARD
REPLACE COMPRESSOR
CHECK OIL LEVEL AND
REPLACE
CHECK WINDING
RESISTANCE AND
REPLACE
COMPRESSOR NOT
WORKING
NO COMPRESSION