Mitsubishi Electric EHGT17D-YM9ED Service Manual page 66

Power circuit board
Diode module
TAB connector
on X52CA
Connect to the
RS resistor
TB-L1,
TB-L2,
TB-L3
Connect to the
converter circuit
board (L1-OU,
L2-OU, L3-OU)
400V AC
CN4
Connect to the con-
troller circuit board
(CN4)
CN2
Connect to the controller circuit board (CN2)
1–5: Power circuit board
→
signal to the controller board (0–5V 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
OCH722A
TB-N
Connect to the CK capacitor
P1 L1
CN5
Detection of primary
current (Connect to
the noise filter circuit
board (CNCT))
Transmitting
1, 2, 6, 7 : + ]
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.
N2
L2 L3 N1
CN7
Connect to the
converter circuit
board (CN7)
CN6
Thermistor
<Heat sink> (TH8)
66
TB-U, TB-V, TB-W
Connect to the compressor (MC)
Voltage among phases:
10V-400V AC
W V U P2
L3OUT-L3IN
Lead connect
DIP-IPM