– 72 –
Check
code
Outdoor
LED display
Check and troubleshooting
(Item without special mention Indicates part of outdoor unit.)
[H02]
[Compressor lock]
Is power supply voltage normal?
AC198 to 264V
NO
Correct power supply line.
NO
Compressor lock → Replace
Check wire connection
and correct it.
YES
Is wire connection correct?
Compressor lead
(P.C. board side, Compressor side),
Reactor lead, Power supply lead
YES
Check outdoor P.C. board.
Failure → Replace
* When replacing outdoor P.C.board, replace
the fuse.
Is compressor under correct conditions?
NOYES
NO
NO
Check TE, TS sensors
and PMV.
Failure → Replace
Is there refrigerant stagnation?
YES
Does PMV correctly operate?
YES
[H03]
[Current detection circuit trouble]
Are CN609 connection and
case thermostat correct?
Check outdoor P.C. board (MCC-1705).
Failure → Replace
[H04]
[Case thermostat operation]
NO
Open service valve fully.
NO
YES
YES
Check outdoor P.C. board.
Failure → Replace
* When replacing outdoor P.C.board,
replace the fuse.
NO
When shorting 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
Fault part repair.
Recharge refrigerant.
Is service valve fully opened?
NO
Check crushed or broken pipe.
Fault part repair
YES
YES
Is PMV normal?
To Next Page
Loading...
