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