58
10-6-4. Check method of noise filter circuit board
Power circuit board
CNDC
(PNK)
NO LO
conv.
circuit
Noise filter circuit board
280–350 V DC
198–253 V AC
Outdoor controller circuit board
1 2
3 4
CNAC(WHT)
3 1
To outdoor controller circuit board
CNDC(PNK)
PTC1, PTC2
(resistor)
52C(relay)
12 V DC from outdoor
controller circuit board
CN52C
Circuit diagram
L2
L1
TB1
NO
CN52C
(BLK)
52C
CN5
(RED)
CNAC1
(WHT)
CNAC2
(RED)
LO
NI
LI
1 2
E1
U
U
3
1
3
1
1
2
E2
Normal
Is the voltage of main incoming power
198–253 V AC ?
•
Check the breaker and power supply.
Is the voltage of CNAC (WHT) on
outdoor controller circuit board CNAC (WHT)
198–253 V AC ?
•
Check wiring.
•
Replace the noise filter circuit board.
Is the voltage of CNDC(PNK) on outdoor
controller circuit board 280–350 V DC?
•
Check wiring.
•
Check power circuit board.
Note: To check the voltage of the parts on this board with a tester is difficult due to its location.
Test points are limited.
Yes
Yes
Yes
Yes
No
No
No
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 noise filter circuit board, and check
52C-relay,wiring,power board and ACTM.
No
(normal)
Noise filter circuit board check
198–253 V AC
198–253 V AC
PUZ-A30/36/42NHA6 PUZ-A30/36/42NHA6-BS
PUY-A30/36/42NHA6 PUY-A30/36/42NHA6-BS
OCH577A
