Mitsubishi Electric PUZ-WZ50VAA Service Manual page 56

Outdoor power circuit board
PUZ-WZ50VAA.UK
PUZ-WZ50VAA-BS.UK
PUZ-WZ60VAA.UK
PUZ-WZ60VAA-BS.UK
PUZ-WZ80VAA.UK
PUZ-WZ80VAA-BS.UK
CN4
Connect to the outdoor
CN6
controller circuit board (CN4)
Thermistor
<Heat sink>
(TH8)
IC600
DIP-IPM
IC500
DIP-IPM
CN2
Connect to the outdoor controller circuit board (CN2)
– : Transmitting signal to outdoor controller circuit
board (0–5 V DC)
– : Zero cross signal (0–5 V DC)
– : 15 V DC
– : 15 V DC
– : 15 V DC
OCH816
Brief Check of DIP-IPM and DIODE MODULE
If they are short-circuited, it means that they are broken.
Measure the resistance in the following points (connectors, etc.).
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,
shown in the diagram are not actually printed on the board.
U/V/W
Connect to the compres-
sor (MC) Voltage among
phases: 10–180 V AC
TB1B, TB3B
Connect to DCL
P1 L N
E5
TB1A,TB3A,
Connect to the earth
Connect to DCL
L , N , N1 , N2 , N3 , P1 , P2 , P3 , U2 , U3 , V2 , V3 , W2 , and W3
CNAC1, CNAC2
230 V AC
Connect to the outdoor controller
circuit board (CNAC)
N1
CNDC
280–380 V DC ( +,
Connect to the outdoor
controller circuit board
(CNDC)
56
NI, LI
Voltage of 230 V AC is
input (Connect to the ter-
minal block (TB1))
E2, E3
Connect to
the earth
EI
−) Connect to the
earth