Mitsubishi Electric PUZ-SWM60VAA Service Manual page 48

PUZ-SWM140VAA.TR
PUZ-SHWM140VAA.TR
E5
Connect to the earth
TB1A, TB2A, TB3A,
Connect to DCL
TB1B, TB2B, TB3B
Connect to DCL
CNDC
280–380 VDC
( +, −)
Connect to the
outdoor control-
ler circuit board
(CNDC)
OCH809A
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
R - P1 , S - P1, R - N1 , S - N1
P2 - L1 , P2 - L2 , P2 - L3 , N2 - L1 , N2 - L2 , N2 - L3
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))
R S
P1
N1
L2 P2
N2
L3 L1
Check of DIODE circuit
Check of PFC circuit
Check of INVERTER circuit
N1 , N2 , N3 , U , V and W
shown in the diagram are not actually printed on the board.
N3
V P3
W U
48
CN4
Connect to the outdoor
controller circuit board (CN4)
CN6
Thermistor
CN2
Connect to the outdoor
controller circuit board (CN2)
– : Transmitting signal to
outdoor controller circuit
board (0–5 VDC)
– : Zero cross signal
(0–5 VDC)
– : 15 VDC
– : 15 VDC
– : 15 VDC
TB-U, TB-V, TB-W
Connect to the compressor (MC)
Voltage among phases:
10–270 VAC