Service Manual

54
OCH636B
Normal
LED1
LED1: lit
LED2: lit
LED2
Fuse check
Check the fuse on outdoor controller circuit board.
Did the fuse (F1 and F2) blow?
Check the indoor controller board wiring.
Did the fuse (F3 and F4) blow? Check the wiring for SV1 and 21S4*.
Is LED1 or LED2 lit?
280 to 380 V DC?
• Check wiring.
•
Replace outdoor controller circuit board.
• Check the breaker and main incoming power.
• Check noise filter circuit board.
• Check wiring.
Check the voltage from the power circuit
board
to CNDC(PNK) connector.
No
No
Yes
(lit)
No (No lit)
Yes
No
Outdoor controller circuit board check
Yes (blow)
Yes (blow)
Outdoor controller circuit board
CNDC (PNK)
Power circuit board
F1
F2
Conv.
Circuit
CNDC
(PNK)
280–380 V DC
F2
CNAC (WHITE)
CNAC1
(WHT)
TB1
208/230 V AC ± 10%
F3
F4
CNAC2
(RED)
1
3
LI NI
L1 N2
1
3
1
3
208/230 V AC ± 10%
208/230 V AC ± 10%
F2
*21S4 is for PUZ only.
PUZ-A24NHA7 PUZ-A30NHA7 PUZ-A36NKA7 PUZ-A42NKA7
PUZ-A24NHA7-BS PUZ-A30NHA7-BS PUZ-A36NKA7-BS PUZ-A42NKA7-BS
PUY-A24NHA7 PUY-A30NHA7 PUY-A36NKA7 PUY-A42NKA7
PUY-A24NHA7-BS PUY-A30NHA7-BS PUY-A36NKA7-BS PUY-A42NKA7-BS
10-6-2. Check method of outdoor controller circuit board