33
Outdoor power circuit board
PUHZ-SHW230YKA
CN5
Detection of
primary current
(Connect to the
outdoor noise filter
circuit board (CNCT))
CN4
Connect to the
outdoor controller
circuit board
(CN4)
CN2
Connect to the outdoor controller circuit board (CN2)
1
-
5
: Power circuit board
→
Transmitting signal to
the controller board (0-5V DC)
2
-
5
: Zero cross signal (0-5V DC)
3
-
4
: Not used
6
-
5
: 16V DC
7
-
5
: 16V DC
[
5
: –
1
,
2
,
6
,
7
: + ]
W
N2
N1
P2
P1
L1
L2
L3
W
W
TAB connecter
on X52A
Connect to the
RS resistor
POWER
MODULE
TB-C1
Connect to the
smoothing capacitor
CB1
–
, CB2
+
TB-P2
Connect to the smoothing
capacitor CB1
+
TB-U, TB-V,
TB-W
Connect to the
compressor (MC)
Voltage among
phases:
10V-400V AC
TB-L1, TB-L2, TB-L3
Connect to the outdoor
noise filter circuit board
(LO1, LO2, LO3)
400V AC
TB-N1
Connect to the
smoothing capacitor
CB2
–
CN7
Connect to the
outdoor converter
circuit board
(CN7)
Brief Check of POWER MODULE
W
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 POWER MODULE
1
Check of DIODE circuit
L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1
2
Check of IGBT circuit
P2 - U , P2 - V , P2 - W , N2 - U , N2 - V , N2 - W
Note: The marks, L1 , L2 , L3 , N1 , N2 , P1 , P2 , U , V and W
shown in the diagram are not actually printed on the board.
OCH534
