Mitsubishi Electric PUHZ-P200YKA.UK Service Manual page 61

Outdoor power circuit board
PUHZ-P200YKA.UK
PUHZ-P250YKAR1.UK
PUHZ-P200YKA.UK
PUHZ-P250YKAR1.UK
Diode module
TB-P1
Connect to the DCL
TAB connector
on X52CA
Connect to the
RS resistor
TB-L1,
TB-L2,
TB-L3
Connect to the outdoor
noise filter circuit board
(LO1, LO2, LO3)
400 V AC
CN4
Connect to the
outdoor controller
circuit board (CN4)
CN2
Connect to the outdoor controller circuit board (CN2)
1–5: Power circuit board
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
OCH582B
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 DIODE MODULE
L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1
2. Check of DIP-IPM
P2 - U , P2 - V , P2 - W , N2 - U , N2 - V , N2 - W
Note: T he marks L1 , L2 , L3 , N1 , N2 , P1 , P2 , U , V and W
shown in the diagram are not actually printed on the board.
TB-P3
Connect to the DCL
P1 L1 L2 L3 N1
CN5
Detection of primary
current (Connect to
CN6
the outdoor noise filter
Thermistor
circuit board (CNCT))
<Heat sink> (TH8)
Transmitting
→
5 : –
1, 2, 6, 7 : +
61
TB-U, TB-V, TB-W
Connect to the compressor (MC)
Voltage among phases:
10–400 V AC
N2
W V U P2
L3OUT-L3IN
Lead connect
DIP-IPM