53
OCH665B
Outdoor power circuit board
PUHZ-FRP71VHA2
PUHZ-FRP71VHA2R1
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
N2 – L1
N2 – L2
3
Check of INVERTER circuit
P3
– U , P3 – V , P3 – W , N3 – U , N3 – V , N3 – W
Note: The marks
R , S , L1 , L2 , P1 , P2 , P3 , N1 , N2 , N3 ,
U , V
and
W
show in the diagram are not actually printed on the board.
CN6
Thermistor
CN4
Connect to the outdoor
controller circuit board
(CN4)
NI, LI
Voltage of 230 V AC is input
(Connected to the terminal
block (TB1))
EI,E2,E3,E4
Connected to
the earth
CNDC
280–380 V DC (
1
+,
3
–
)
connect to the outdoor
controller circuit board
(CNDC)
TB1A, TB3A, TB1B, TB3B
Connected to DCL
CNAC1, CNAC2
230 V AC
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 V DC)
2
–
5
: Zero cross signal
(0–5 V DC)
3
,
4
: 16 V DC
6
–
5
: 16 V DC
7
–
5
: 16 V DC
P3
U
V
W
N3
P2
L1
L2
N2
S
R
P1
N1
