Mitsubishi Electric PUHZ-ZRP35VKA2 Service Manual page 62

Outdoor power circuit board
PUHZ-ZRP60VHA2
PUHZ-ZRP60VHA2-ER
PUHZ-ZRP60VHA2-ET
PUHZ-ZRP71VHA2
PUHZ-ZRP71VHA2-ER
PUHZ-ZRP71VHA2-ET
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)
OCH635A
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 N3
P3
V3
62
U2 W2
P2
V2 N2
CN2
Connect to the outdoor controller circuit board (CN2)
1–5: Outdoor 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 : –