Service manual

41
Outdoor power circuit board
PUHZ-SW40VHA
PUHZ-SW40VHA-BS
PUHZ-SW50VHA
PUHZ-SW50VHA-BS
Brief Check of DIP-IPM and DIP-PFC
W Usually, they are in a state of being short-circuited if they are broken.
Measure the resistance in the following points (connectors, etc.). If they
are short-circuited, it means that they are broken.
1. Check of DIP-IPM
P2 - U , P2 - V , P2 - W , N2 - U , N2 - V , N2 - W
2. Check of DIP-PFC
P1 - L , P1 - N , L - N1 , N - N1
Note: The marks, L , N , N1 , N2 , P1 , P2 , U , V and W
shown in the diagram are not actually printed on the board.
P1 N L N1 N1
N2 W V UP2
CN2
Connect to the outdoor controller circuit board (CN2)
1-5: Outdoor power circuit board
→ Transmitting signal
to the outdoor controller circuit board (0-5V DC)
2-5: Zero cross signal (0-5V DC)
3-4: Not used
6-5: 16V DC
7-5: 16V DC
1, 2, 6, 7 : +
5 : –
]
[
LD1-LD2
280-380V DC
Connect to
the outdoor
controller
circuit board
(CNDC)
R, S
Connect to the ACL
230V AC
U, V, W
Connect to the compressor (MC)
Voltage among phases: 5V to 180V AC
CN5
Primary current detection
(Connect to the outdoor
noise filter circuit board
(CN5))
CN4
Connect from the
outdoor controller
circuit board
(CN4)
CN3
Thermistor
<Heatsink>
(TH8)
DIP-IPM
DIP-PFC
OCH525