Diode Module - Mitsubishi Electric PUMY-P112VKM4 Technical & Service Manual

Outdoor power circuit board
PUMY-P112YKM4(-BS)
PUMY-P125YKM4(-BS)
PUMY-P140YKM4(-BS)

Diode module

TB-P1
Connect to
the DCL
TAB connec-
tor 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 out-
door multi controller
circuit board (CN4)
CN2
Connect to the outdoor multi controller circuit board (CN2)
1–5: Power circuit board
→
outdoor multi controller circuit board (0–5 V DC)
2–5: Zero cross signal (0–5 V DC)
3–4: Not used
[ 5 : –
6–5: 15 V DC
7–5: 15 V DC
OCH673D
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 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: The marks L1 , L2 , L3 , N1 , N2 , P1 , P2 , U , V and W
shown in the diagram are not actually printed on the board.
P1 L1
CN5
Detection of primary
current (Connect to
the outdoor noise filter
circuit board (CNCT))
Transmitting signal to the
1, 2, 6, 7 : + ]
TB-P3
Connect to the DCL
N2
L2 L3 N1
CN6
Thermistor
<Heat sink> (TH8)
121
TB-U, TB-V, TB-W
Connect to the compressor (MC)
Voltage among phases:
10–400 V AC
W V U P2
L3OUT-L3IN
Lead connect
DIP-IPM