Mitsubishi Electric PUMY-P36NKMU3 Technical & Service Manual page 113

Outdoor power circuit board
PUMY-P60NKMU3
PUMY-P60NKMU3-BS
PUMY-HP36NKMU1
PUMY-HP48NKMU1
E5
Connect to the electrical
parts box
TB3, TB4
Voltage of 208/230 V AC
is input
(Connect to the outdoor
noise filter board (TB1,
TB2))
TB1A, TB2A, TB3A,
TB1B, TB2B, TB3B
Connect to DCL
CNDC
290–380 V DC (1+, 2−)
Connect to the outdoor
multi controller circuit
board (CNDC)
OCH733
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 - L1 , S - L1 , R - N1 , S - N1
2 Check of IGBT circuit
L2 - N1
3 Check of INVERTER circuit
P - U , P - V , P - W , N1 - U , N1 - V , N1 - W
Note: The marks R , S , L1 , L2 , P , N1 , U , V and W shown
in the diagram are not actually printed on the board.
P1 R
S N1
N2
L2
L3 L1
113
N3 V
P2
W U
CN4
Connect to the outdoor
multi controller circuit
board (CN4)
CN6
Thermistor (TH8)
CN2
Connect to the outdoor
multi controller circuit
board (CN2)
1–5: Transmitting sig-
nal to outdoor
controller circuit
board ((0–5 V
DC)
2–5: Zero cross sig-
P3
nal (0–5 V DC)
3–4: 15 V DC
6–5: 15 V DC
7–5: 15 V DC
TB-U, TB-V, TB-W
Connect to the compres-
sor (MC)
Voltage among phases:
10-180 V AC