Mitsubishi Electric PUD-SWM60VAA Service Manual page 45

PUD-SHWM140VAAR1
E5
Connect to the earth
TB1A, TB2A, TB3A,
Connect to DCL
TB1B, TB2B, TB3B
Connect to DCL
CNDC
280–380 VDC
(1+, 2−)
Connect to the
outdoor control-
ler circuit board
(CNDC)
OCH756
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
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))
45
N1 , N2 , N3 , U , V and W
shown in the diagram are not actually printed on the board.
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
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