58
59
OCH754A
Outdoor power circuit board
SUZ-KA30NAHZ
SUZ-KA36NAHZ
CN6
Thermistor
CN4
Connect to the outdoor
controller circuit board
(CN4)
NI, LI
Voltage of 208/230 VAC is input
(Connected to the terminal block
(TB1))
EI,E2,E3,E4
Connected to
the ground
CNDC
280–380 VDC (
1
+,
3
–)
connect to the outdoor
controller circuit board
(CNDC)
TB1A, TB2A, TB3A, TB1B,
TB2B, TB3B
Connected to DCL
CNAC1, CNAC2
208/230 VAC
Connected to the outdoor
controller circuit board
(CNAC)
CN2
Connect to the outdoor controller circuit board (CN2)
1
–
5
: Transmitting signal to outdoor controller
circuit board (0–5 VDC)
2
–
5
: Zero cross signal
(0–5 VDC)
3
,
4
: 15 VDC
6
–
5
: 15 VDC
7
–
5
: 15 VDC
P3
U
V
W
N3
P2
L1
L2
L3
N2
S
R
P1
N1
Brief Check of POWER MODULE
If they are short-circuited, it means that they are broken.
Measure the resistance in the following points (connectors, etc.).
1. Check POWER MODULE
1
Check of DIODE circuit
R – P1 S – P1 R – N1 S – N1
2
Check of PFC circuit
P2 – L1 P2 – L2 P2 – L3 N2 – L1 N2 – L2 N2 – L3
3
Check of INVERTER circuit
P3 – U , P3 – V , P3 – W , N3 – U , N3 – V , N3 – W
Note: The marks
R , S , L1 , L2 , L3 , P1 , P2 , P3 , N1 , N2 , N3 ,
U , V and W
show in the diagram are not actually printed on the board.
TB-U, TB-V, TB-W
Connect to the compressor (MC)
