Mitsubishi Electric PUZ-ZM35VKA Service Manual page 68

Outdoor power circuit board
PUZ-ZM60VHA
PUZ-ZM71VHA
LI, NI
Voltage of 230 V AC is
input (Connect to the
terminal block (TB1))
CNAC1, CNAC2
230 V AC
Connect to the out-
door controller circuit
board (CNAC)
U, V, W
Connect to the com-
pressor (MC)
Voltage among phases:
5 to 180 V AC
IC600
DIP-IPM
CN4
Connect from the
outdoor controller
circuit board
(CN4)
CN6
Thermistor
<Heat sink> (TH8)
OCH653
Brief Check of DIP-IPM and DIODE MODULE
Usually, they are in a state of being short-circuited if they are broken.
Measure the resistance in the following points (connectors, etc.). If they
are short-circuited, it means that they are broken.
1. Check of DIP-IPM
P2 - U2 , P2 - V2 , P2 - W2 , N2 - U2 , N2 - V2 , N2 - W2
P3 - U3 , P3 - V3 , P3 - W3 , N3 - U3 , N3 - V3 , N3 - W3
2. Check of DIODE MODULE
P1 - L , P1 - N , L - N1 , N - N1
Note: The marks,
L , N , N1 , N2 , N3 , P1 , P2 , P3 , U2 , U3 , V2 , V3 , W2 , and W3
shown in the diagram are not actually printed on the board.
E2, EI, E3, E4
Connect to earth
U3 W3
P3 N3
V3
68
W2
U2
P2
V2
N2
CN2
Connect to the outdoor controller circuit board (CN2)
1–5: O utdoor power circuit board
to the outdoor controller circuit board (0–5 V DC)
2–5: Zero cross signal (0–5 V DC)
[
3–4: Not used
1, 2, 6, 7 : +
6–5: 16 V DC
7–5: 16 V DC
CNDC
280–380 V DC (1: +, 3−)
Connect to the out-
door controller circuit
board (CNDC)
TB1A, TB3A, TB1B,
TB3B
Connect to DCL
IC500
DIP-IPM
Transmitting signal
→
]
5 : –