Mitsubishi Electric PUHZ-W50VHA Service Manual page 77

Outdoor power circuit board
PUHZ-W50VHA(-BS)
PUHZ-W50VHAR1(-BS)
PUHZ-W50VHAR2(-BS)
PUHZ-W50VHAR3(-BS)
LD1-LD2
280–380 V DC
Connect to
the outdoor
controller
circuit board
(CNDC)
CN2
Connect to the outdoor controller circuit board (CN2)
1–5: Outdoor power circuit board
nal to the outdoor controller circuit board (0–5 V DC)
2–5: Zero cross signal (0–5 V DC)
3–4: Not used
[
1, 2, 6, 7: +
6–5: 16 V DC
7–5: 16 V DC
OCH439M
Brief Check of DIP-IPM and DIP-PFC
If they are short-circuited, it means that they are broken.
Measure the resistance in the following points (connectors, etc.).
1. Check of DIP-IPM
2. Check of DIP-PFC
Note: The marks, L , N , N1 , N2 , P1 , P2 , U , V and W
shown in the diagram are not actually printed on the board.
Transmitting sig-
→
]
5: –
P2 - U , P2 - V , P2 - W , N2 - U , N2 - V , N2 - W
P1 - L , P1 - N , L - N1 , N - N1
R, S
Connect to the ACL
230 V AC
P1 N L
N2 W
CN3 CN4
Thermistor Connect from the
<HEAT SINK> outdoor controller
(TH8) circuit board
(CN4)
77
U, V, W
Connect to the compressor (MC)
Voltage among phases: 5–180 V AC
N1 N
V U P1
CN5
Primary current detection
(Connect to the outdoor
noise filter circuit board
(CN5))
DIP-PFC
LD9
Connect to
the earth
DIP-IPM