8 Troubleshooting
232
SMGB0064 rev.0 - 08/2011
Phenomenon Cause Check item
Action
(Turn OFF the main switch)
Decrease of Discharge
Gas Superheat
Ref. cycle is different from the electrical system
Check ref. cycle and the
electrical system
Repair wiring
Overcharged Refrigerant Measure pressure Correctly charge refrigerant
Faulty Expansion Valve Check expansion valve *1)
Replace expansion valve if
faulty
Faulty PCB
Fault
Replace PCB and check
operation
Replace PCB if faulty
Disconnected Wires for
Ex.Valve Control
Check connections. Repair wiring connections
Faulty Discharge Gas
Thermistor
Fault Measure resistance. Replace thermistor if faulty
Incorrect Mounting
Check mounting state
.(See “Alarm Code 08”.)
Correctly mount thermistor.
Incorrect Connection Check connections.
Remove looseness,
replace connector or repair
connections.
N O T E
• *1) Refer to section Procedure of checking other main parts for ES Series, see on page 312 in part “Checking
procedure for the electronic expansion valve”.
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