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Outdoor power circuit board
PUHZ-SW100VHA.UK
PUHZ-SW100VHA-BS.UK
PUHZ-SW120VHA.UK
PUHZ-SW120VHA-BS.UK
Brief Check of POWER 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 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)
NI, LI
Voltage of 230 V AC is
input (Connect to the ter-
minal block (TB1))
EI, E4
Connect to the
earth
DCL1, DCL2
Connect to DCL
P2
Connect to the smooth-
ing capacitor CB +
U/V/W
Connect to the compres-
sor (MC) Voltage among
phases: 10 V-180 V AC
CNDC
280-380 V DC (1+, 3-)
Connect to the outdoor
controller circuit board
(CNDC)
E2, E3
Connect to the earth
CN52C
52C driving signal
Connect to the outdoor
controller circuit board
(CN52C)
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
N2
Connect to the smoothing
capacitor CB -
CN4
Connect to the outdoor
controller circuit board (CN4)
Power module
SR
W V U L2 P N1 L1
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