Table of Contents
Outdoor power circuit board
PUZ-WM50VHA.UK
PUZ-WM50VHA-BS.UK
EI, E3
Connect to
the earth
R/L1, S/N1
Voltage of 230 V AC
is input. (Connect to
the terminal block
(TB1))
CNAC1, CNAC2
230 V AC
Connect to the
outdoor controller
circuit board (CNAC)
CN6
Thermistor (TH8)
CN4
Connect to the
outdoor controller
circuit board (CN4)
DIP-IPM
IGBT (Q600)
U, V, W
Connect to the
compressor (MC)
Voltage among phases:
10–180 V AC
OCH727
Brief Check of POWER MODULE
If they are short-circuited, it means that they are broken.
Measure the resistance in the following points (connectors, etc.).
1. Check of diode bridge
TABP1-TABS, TABN1-TABS, TABP1-TABT, TABN1-TABT
2. Check of DIP-IPM
P-U, P-V, P-W, N-U, N-V, N-W
44
E4
Connect to the
earth
CN2
Connect to the out-
door controller circuit
board (CN2)
1–5: Outdoor power
circuit board
Transmitting
→
signal to the
outdoor control-
ler circuit board
(0–5 V DC)
2–5: Zero cross sig-
nal (0–5 V DC)
3–4: 15 V DC
6–5: 16 V DC
7–5: 16 V DC
[
]
1, 2, 6, 7 : +
5 : –
TBL2, TBL4
Connect to ACL
Diode bridge
(DB1, DB2)
CNDC
280–380 V DC
Connect to the outdoor
controller circuit board
(CNDC)
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