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(4) Simple checking procedure for individual components of main inverter circuit
* Before checking, turn the power off and remove the parts to be checked from the control box.
Part name
Diode stack
IPM (Intelligent power
module)
Rush current protec-
tion resistor
R11, R12
Electromagnetic con-
tactor
52C(1), 52C2, 52F
DC reactor DCL
Current sensor ACCT
Refer to "Diode stack" ( 9.[4] -6- (6) )
Refer to "Intelligent power module (IPM)" ( 9.[4] -6- (5) )
Measure the resistance between terminals: 47 ohm
[In the case of 52C1, 52C2]
13
Pushbutton
14
[In the case of 52F]
L1
Pushbutton
T1
Measure the resistance between terminals: 1 ohm or lower (almost 0 ohm)
Measure the resistance between terminals and the chassis:
Disconnect the CNCT2 connector and measure the resistance between terminals: 280 ohm
1 - 2 PIN (U-phase),3 - 4 PIN (W-phase)
ACCT-U
* Check the ACCT connection phase and the
direction of the connection.
Judgment method
A1
A2
L1
L2
L3
31
T1
T2
T3
32
A1
A2
L2
L3
13
T2
T3
14
U
W
U
V
W
IPM
- 161 -
[ IX Troubleshooting ]
10%
Check point
Judgment value
A1-A2
0.1 k ~ 2.0 k
Button
L1 - T1
1 or less (almost 0 )
on
L2 - T2
1 or less (almost 0 )
(hold down)
1 or less (almost 0 )
L3 - T3
1 or less (almost 0 )
13 - 14
31 - 32
Button
L1 - T1
OFF
L2 - T2
L3 - T3
13 - 14
31 - 32
1 or less (almost 0 )
30 ohm
ACCT-W
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