76
[H02]
[Compressor lock]
[H03]
[Current detection circuit trouble]
[H04]
[Case thermostat operation]
Check
code
Outdoor LED
indication
Check and troubleshooting
(Item without special mention indicates part of outdoor unit.)
Is power supply voltage normal?
(AC198 to 264 V)
NO
Correct power supply line.
NO
Compressor lock → Replace
Check wire connection
and correct it.
YES
YES
Replace outdoor P.C. board.
* When replacing outdoor P.C. board, replace
the fuse.
Is compressor under correct conditions?
NO
YES
NO
NO
Replace TE, TS sensors
and PMV.
Malfunction → Replace
Is there refrigerant stagnation?
YES
Does PMV correctly operate?
YES
Is wire connection correct?
Compressor lead wires
(P.C. board side, Compressor side),
Reactor lead wires,
Power supply lead wires
Replace outdoor P.C. board.
Are GP56: CN500,
GP80: CN609
connection and case
thermostat correct?
NO
Open service valve fully.
NO
YES
YES
Replace outdoor P.C. board.
* When replacing outdoor P.C. board,
replace the fuse.
NO
When short-circuit the case
thermostat, can you perform
the cooling / heating operation?
NO
Correct connector.
Case thermostat trouble → Replace
Replace the PMV.
Is there gas leak?
Is there refrigerant shortage?
YES
Malfunction part repair.
Recharge refrigerant.
Is service valve fully opened?
NO
Check crushed or broken pipe.
Malfunction part repair
YES
YES
Is PMV normal?