Mitsubishi Electric PUZ-ZM60VHA2 Service Manual page 70

Outdoor power circuit board
PUZ-ZM60VHA2(-ET/-ER).UK
PUZ-ZM71VHA2(-ET/-ER).UK
PUZ-ZM100VKA2(-ET/-ER).UK
PUZ-ZM125VKA2(-ET/-ER).UK
PUZ-ZM140VKA2(-ET/-ER).UK
CN4
Connect to the outdoor
controller circuit board (CN4)
U/V/W
Connect to the compres-
Power
sor (MC) Voltage among
module
phases: 10–180 V AC
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: 18 V DC
6–5: 16 V DC
7–5: 16 V DC
OCH771
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.
CNAC1, CNAC2
230 V AC
Connect to the out-
door controller circuit
board (CNAC)
TB1A, TB2A, TB3A,
TB1B, TB2B, TB3B
Connect to DCL
*TB2A and TB2B are not mounted
on board for ZM60-100V model.
70
NI, LI
Voltage of 230 V AC is
input (Connect to the
terminal block (TB1))
E2, E3
Connect to the earth
CNDC
280–380 V DC (1+, 3−)
Connect to the outdoor
controller circuit board
(CNDC)
EI, E4
Connect to the
earth