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U
W
U
V
IPM
W
Simple Checking Procedure for Individual Components of Main Inverter Circuit
4)
Part name
Judgement method
Diode Stack
Refer to "Determining Diode Stack Troubleshooting" (
7
∞
[1] (3) 6) )
IPM
(Intelligent Power Module)
Rush current protection resistor
R1, R5
Electromagnetic contactor (52C)
DC reactor DCL
Cooling fan (MF1)
Current sensor
ACCT
Refer to "Determining IPM interference" (
7
∞
[1] (3) 5) )
Measure the resistance between terminals: 4.5~5.5k
Ω
Measure the resistance between terminals: 1
Ω
or lower (almost 0
Ω
)
Measure the resistance between terminals and the chassis:
Measure the resistance between terminals : 0.1k~1.5k
Ω
Measure the resistance value at each terminal.
Disconnect the CNCT2 target connector
and check the resistance between
terminals: 35~45
Ω
1-2PIN (U-phase)
3-4PIN (W-phase)
* Check the ACCT connecting phase and direction.
ACCT-W
ACCT-U
Transformar (To1)
Measure the resistance between terminals on the primary side (CNTR1) : 1.0k~2.5k
Ω
Measure the resistance between terminals on the secondary side (CNTR) : 20~60
Ω
Check Location
A1-A2
1/L1-2/T1
3/L2-4/T2
5/L3-6/T3
Judgement value
0.1k~1.3k
Ω
A2
1/L1
3/L2
5/L3
2/T1
4/T2
6/T3
A1
