53
LO1, LO2, LO3
POWER SUPPLY
LO1-LO2/LO2-LO3/LO3-LO1: 400 V AC OUTPUT
(Connect to the outdoor power circuit board (TB1-L1, L2, L3))
Outdoor power circuit board
PUHZ-SW75VHA.UK
PUHZ-SW75VHAR3.UK
PUHZ-SW75VHA-BS.UK
PUHZ-SW75VHAR3-BS.UK
Brief Check of DIP-IPM and DIP-PFC
Usually, they are in a state of being short-circuited if they are broken.
Measure the resistance in the following points (connectors, etc.).
If they are short-circuited, it means that they are broken.
1. Check of DIP-IPM
P2 - U , P2 - V , P2 - W , N2 - U , N2 - V , N2 - W
2. Check of DIP-PFC
P1 - L , P1 - N , L - N1 , N - N1
Note:The marks L , N ,
N1 , N2 , P1 , P2 , U , V and W shown
in the diagram are not actually printed on the board.
CN2
Connect to the outdoor controller circuit board (CN2)
1
–
5
:Outdoor power circuit board
→
Transmitting signal
to the outdoor controller circuit board (0–5 V DC)
2
–
5
: Zero cross signal (0–5 V DC)
3
–
4
: Not used
6
–
5
: 16V DC
7
–
5
: 16 V DC
1
,
2
,
6
,
7
: +
5
: –
]
[
LD1-LD2
280–380 V DC
Connect to
the outdoor
controller
circuit board
(CNDC)
R, S
Connect to the ACL
230 V AC
U, V, W
Connect to the compressor (MC)
Voltage among phases: 5 to 180 V AC
LD9
Connect to
the earth
CN5
Primary current detection
(Connect to the outdoor
noise filter circuit board
(CN5))
CN4
Connect from the
outdoor controller
circuit board
(CN4)
CN3
Thermistor
<Heat sink>
(TH8)
DIP-IPM
DIP-PFC
P1
N
L
N1
N1
N2
W
V
U
P2
OCH533D