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Check method of ACTM
Normal
Is the voltage of mainincoming power
208/230V ± -10% AC?
*Check the breaker and power supply
*
To check the voltage of the parts on this board with a tester is difficult due to its location.
Test points are limited.
Is the voltage of CNDC(PNK) on multi
board 330 - 350V DCduring cooling or
heating operation?
*Check wiring
*Check 52C relay
*Check ACTM
Yes
Yes
No
No
Is the voltage between 3pin and
4pin ofCN2 on multi controller
board 18VDC?
*Replace multi controller board
Yes
No
ACTM check
(Active Filter Module)
Power supply
52C relay
Bus bar voltage
(DC)
COMP (Hz)
ACTM
OFF
OFF
ON
OFF
ON
0Hz
ex. 48Hz
0V
290/325V
330-350V
ON
208/230V
min Hz
290/325V
OFF
TIME CHART
power on starts stop
Noise filter circuit board
208/230V
±10% AC
LI
NI
208/230V ±10% AC
LO
NO
Power board
operate:330-350V DC
stop :290-325V DC
ACTM
Multi controller board
3
-
1
CNDC
(PNK)
765
43
21
CN2
(WHT)
conv. circuit
208/230V
±10% AC
CN2 3-4pin : 18V DC
ACTM gate drive power supply
operate:330-350V DC
stop :290-325V DC
P48NHMU
(1)
P36NHMU
P48NHMU
2
52C
52C
DCL
Circuit giagram
COMP
W
U-V 10V-180V AC
U-W 10V-180V AC
V-W 10V-180V AC
W
W
W
V
U
L1
L2
TB1