Panasonic 26PEK2U6 26PEK2U6 Service Manual - Page 253
Alarm P26], HIC PCB trouble, IGBT short-circuit protection on inverter control IPDU PCB
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(2) [Alarm "P26"] HIC PCB trouble) IGBT short-circuit protection on inverter control (IPDU) PCB 4. Service procedures No Is power OK? Correct power line. Yes Are circuit wiring, connector No connections, and reactor connections OK? Yes Correct. Has filter PCB No RY001 or RY002 relay activated? Yes Disconnect U.V.W. output terminal on HIC PCB and No start operation. Does alarm "P26" occur? Yes Has filter PCB AC fuse blown? Yes Replace filter PCB. No Replace HIC PCB. Is compressor OK? No (Check for layer short circuit.) 4 Replace compressor. Yes Is resistance between each terminal on No HIC PCB OK? (See following page.) Yes Replace outdoor unit control PCB. Check HIC PCB. Replace if PCB has failed. 4-9
4-9
4. Service procedures
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Replace outdoor unit
control PCB.
(2)
[Alarm “P26”]
HIC PCB trouble)
IGBT short-circuit protection on inverter control (IPDU) PCB
Is power OK?
Correct power line.
Are
circuit wiring,
connector
connections, and
reactor
connections
OK?
Correct.
Has filter PCB
RY001 or RY002
relay activated?
Has filter PCB
AC fuse blown?
Replace filter PCB.
Disconnect
U.V.W. output
terminal on HIC PCB and
start operation.
Does alarm
“P26”
occur?
Replace HIC PCB.
Is
compressor OK?
(Check for layer
short circuit.)
Replace compressor.
Is
resistance
between
each terminal on
HIC PCB OK?
(See following
page.)
Check HIC PCB.
Replace if PCB
has failed.
4