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Outdoor power circuit board
PUHZ-SP125YHA.UK
PUHZ-SP140YHA.UK
W
N2N1P2
P1
L1
L2
L3
W
W
Brief Check of POWER MODULE
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.
TB-U, TB-V,
TB-W
Connect to the
compressor (MC)
Voltage among
phases:
10
–400 V AC
TB-L1, TB-L2, TB-L3
Connect to the outdoor
noise filter circuit board
(LO1, LO2, LO3)
400 V AC
TB-N1
Connect to the
smoothing capacitor
CB2
–
POWER
MODULE
TB-C1
Connect to the
smoothing capacitor
CB1
– , CB2 +
TB-P2
Connect to the smoothing
capacitor CB1
+ , reactor(DCL)
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 (0–5 V DC)
2–5: Zero cross signal (0–5 V DC)
3–4: Not used
6–5: 16 V DC
7–5: 16 V DC
TAB connecter
on X52A
Connect to the
RS resistor
[ 5 :
–
1, 2, 6, 7 : + ]
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