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Check
code
Outdoor
LED display
Check and troubleshooting
(Item without special mention indicates part of outdoor unit.)
[1C]
∗
There is a possibility that it is one of the following errors.
Confirm LED on outdoor P.C. board to judge which error it is.
Compressor system error, Compressor lock, Gas side temp. sensor (TGa to TGc)
error, Gas leakage, PMV error
[Compressor system error, Compressor lock]
YES
NO
Is AC mains voltage correct?
(198 to 264V)
Check wiring construction.
Ask repair of power supply.
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
Is wire connection correct?
Compressor lead
(Board side, Compressor Side),
Reactor lead, Power supply lead.
Is compressor under correct condition?
Is there refrigerant stagnation?
Does PMV correctly operate?
Are the power devices on P.C. board
MCC-1571 screwed without looseness?
(Rear sides of Q201, Q300, Q650, DB01, DB02)
Are radiation grease properly applied?
(Q201)
Does something block
the ventilation around the heat sink?
Does something air flow from the fan?
Check outdoor P.C.B MCC-1571 and MCC-5071.
Defect
→
Replace.
Apply radiation grease to objective parts.
Retightening of screws.
(Be sure not to forget to attach insulating sheet
between heat sink and Q300, Q650, DB01, DB02)
Remove blocking matter.
Correct short-circuit.
Check wire connection
and correct it.
Compressor lock
→
Replace.
Check TE, TS sensor and PMV.
Detect
→
Replace.