56
10-6-4. Check method of power circuit board
Normal
Is the voltage of main incoming power
•
Check the breaker and power supply.
Is the voltage to the compressor
(U-V,U-W and V-W) balanced?
Note: To check the voltage of the parts on this board with a tester is difficult due to its location.
Test points are limited.
•
Check wiring.
•
Check model setting switch SW6
on the outdoor controller circuit board.
•
Replace the power board.
Is the voltage of CNDC(PNK) on outdoor
controller circuit board 280–380 V DC?
Yes
Yes
Yes
No
No
No
Power board check
198–253 V AC?
•
Check wiring.
•
Check power board.
Turn off the incoming power supply
and check the resistance of PTC1
and PTC2 on the noise filter circuit board.
PTC1 or PTC2 = open ?
Yes (open)
•
Replace the power board.
No
(normal)
Power supply
52C relay
Bus bar voltage
(DC)
COMP (Hz)
OFF
ON
OFF
ON
0 Hz
ex. 48 Hz
0 V
290/325 V
370–390 V
208/230 V
min Hz
290/325 V
TIME CHART
power on starts stop
CNDC
(PNK)
7 6 5 4 3 2 1
Comp
U
V
W
1
3
L1 L2
DCL1
DCL2
DCL3
208/230 V AC ± 10%
TB1
208/230 V AC ± 10%
U-V 10–270 V AC
U-W 10–270 V AC
W-U 10–270 V AC
Outdoor controller
circuit board
Controller
board
280–380 V DC
Power circuit board
Circuit diagram
PUZ-A36NKA7
PUZ-A42NKA7
PUY-A36NKA7
PUY-A42NKA7
PUZ-A36NKA7-BS PUZ-A42NKA7-BS
PUY-A36NKA7-BS PUY-A42NKA7-BS
OCH636A
Содержание PUY-A12NKA7
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