56
Brief Check of POWER MODULE
W 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
L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1
2.Check of IGBT circuit
P2 - U , P2 - V , P2 - W , N2 - U , N2 - V , N2 - W
Outdoor power circuit board
PUHZ-P200YHA
PUHZ-P250YHA
PUHZ-P200YHA3
PUHZ-P250YHA3
PUHZ-P200YHA3R1
PUHZ-P250YHA3R1
PUHZ-P200YHA3R2
PUHZ-P250YHA3R2
PUHZ-P200YHA3R3
PUHZ-P250YHA3R3
CN5
Detection
of primary
current(Connect
to the outdoor
noise filter
circuit board
(CNCT))
CN4
Connect to the
outdoor con-
troller circuit
board
(CN4)
CN2
Connect to the outdoor controller circuit
board (CN2)
1-5: Power circuit board
→ Transmitting
signal to the controller board (0-5V DC)
2-5: Zero cross signal (0-5V DC)
3-4: Not used
6-5: 16V DC
7-5: 16V DC
[ 5 : – 1, 2, 6, 7 : + ]
Note:The marks, L1 , L2 , L3 , N1 , N2 , P1 , P2 , U , V and W
shown in the diagram are not actually printed on the board.
TAB connecter on
X52A
Connect to the
RS resistor
POWER
MODULE
TB-P2
Connect to the smoothing
capacitor CB1
+
SC-U, SC-V, SC-W
Connect to the compressor (MC)
Voltage among phases: 10V-400V AC
TB-L1, TB-L2,
TB-L3
Connect to the
outdoor noise fil-
ter circuit board
(L01, L02, L03)
380V-415V AC
TB-N1
Connect to the
smoothing capacitor
CB2
–
TB-P1
Connect to DCL
TB-C1
Connect to the
smoothing capacitor
CB1
– , CB2 +
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