Hitachi RPI-0.8FSG1 Service Manual page 52

TROUBLESHOOTING
Phenomenon
Excessively High
Discharge Gas
Temperature
(at Top of
Compressor)
1-42
Cause
Ref. Cycle is Different from
the Electrical System
Shortage of Refrigerant
Faulty Ex. Valve
Fault
Faulty PCB
Disconnected
Wires for Ex.
Valve
Faulty Gas Bypass
Solenoid Valve
Fault
Faulty
Incorrect
Discharge
Mounting of
Gas
Thermistor
Thermistor
Incorrect
Wiring
Check Item
Check ref. cycle and
the electrical system.
Check pressures.
Check ex. valve
(Refer to 1.3.6).
Replace PCB and
check operation.
Check connections.
Ref. Leakage
Check resistance
of thermistor.
Check mounting state.
Check connections.
Action
(Turn OFF Main Switch)
Repair wiring.
Correctly charge
refrigerant.
Replace ex. valve
if faulty.
Replace PCB if faulty.
Repair wiring
connections.
Replace solenoid
valve if faulty.
Replace thermistor
if faulty.
Correctly mount
thermistor.
Remove looseness,
replace connectors or
repair connections.