Mitsubishi Electric PUZ-HWM140VHA Service Manual page 42

Outdoor power circuit board
PUZ-HWM140VHA(-BS)
E5
Connect to the earth
TB1A, TB2A, TB3A,
TB1B, TB2B, TB3B
Connect to DCL
CNDC
280–380 VDC
(1+, 2−)
Connect to the
outdoor control-
ler circuit board
(CNDC)
OCH748
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 POWER MODULE
1 Check of DIODE circuit
2 Check of PFC circuit
P2 - L1 , P2 - L2 , P2 - L3 , N2 - L1 , N2 - L2 , N2 - L3
3 Check of INVERTER circuit
Note: The marks R , S , L1 , L2 , L3 , P1 , P2 , P3 ,
TB3, TB4
POWER SUPPLY
Voltage of 230 VAC is input
(Connect to the outdoor noise filter board (TB1, TB2))
P1 R S N1
N2 L2
L3 L1
R - P1 , S - P1, R - N1 , S - N1
P3 - U , P3 - V , P3 - W , N3 - U , N3 - V , N3 - W
N1 , N2 , N3 , U , V and W
shown in the diagram are not actually printed on the board.
V
P2 N3
W
U
42
CN4
Connect to the outdoor
controller circuit board (CN4)
CN6
Thermistor
CN2
Connect to the outdoor
controller circuit board (CN2)
1–5: Transmitting signal to
outdoor controller circuit
board (0–5 VDC)
2–5: Zero cross signal
(0–5 VDC)
3–4: 15 VDC
P3
6–5: 15 VDC
7–5: 15 VDC
TB-U, TB-V, TB-W
Connect to the compressor (MC)
Voltage among phases:
10-270 VAC