Mitsubishi Electric Mr.Slim PUZ-SM100VKA Service Manual page 69

Outdoor power circuit board
PUZ-SM100VKA.TH
PUZ-SM125VKA.TH
PUZ-SM140VKA.TH
CN2
Connect to the outdoor
controller circuit board (CN2)
1-5:Transmitting signal to
outdoor controller
circuit board (0-5 V DC)
2-5: Zero cross signal
(0-5 V DC)
3-4:16 V DC
6-5:16 V DC
7-5:16 V DC
TB1A, TB2A, TB3A,
TB1B, TB2B, TB3B
Connect to DCL
*TB2A and TB2B are
not mounted on board
for SM100V model.
CNDC
280-380 V DC (1+, 3-)
Connect to the out-
door controller circuit
board (CNDC)
OCH708
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 IGBT 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 , N1 , N2 , N3 , U , V and W
shown in the diagram are not actually printed on the board.
69
EI, E2, E3, E4
Connect to the earth
CN6
Thermistor
CN4
Connect to the outdoor
controller circuit board
(CN4)
CNAC1, CNAC2
230 V AC
Connect to the outdoor
controller circuit board
(CNAC)
NI, LI
Voltage of 230
V AC is input
(Connect to the
terminal block
(TB1))