Mitsubishi Electric City Multi PUMY-SP112VKM Technical & Service Manual page 113

Outdoor power circuit board
PUMY-SP112YKM(R1).TH
PUMY-SP125YKM(R1).TH
PUMY-SP140YKM(R1).TH
PUMY-SP112YKM(R1).TH-BS
PUMY-SP125YKM(R1).TH-BS
PUMY-SP140YKM(R1).TH-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
(L01, L02, L03)
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: 16 V DC
7–5: 16 V DC
OCH668B
P1 L1
CN5
Detection of primary
current (Connect to
the outdoor noise filter
circuit board (CNCT))
Transmitting signal to the
1, 2, 6, 7 : + ]
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
N2
L2 L3 N1
CN6
Thermistor
<Heat sink> (TH8)
113
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