Service manual

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11-8-5. Checking Method for Each Part

No.

Part name

Electrolytic capacitor

(For raising pressure,

smoothing)

Checking procedure

1. Turn OFF the power supply breaker.

2. Discharge all three capacitors completely.

3. Check that safety valve at the bottom of capacitor is not broken.

4. Check that vessel is not swollen or exploded.

5. Check that electrolytic liquid does not blow off.

6. Check that the normal charging characteristics are shown in continuity test by

the tester.

Case that product is good

Pointer swings once, and returns

slowly. When performing test

once again under another

polarity, the pointer should return.

C12, C13, C14, C15 → 500µF/400V

2 IGBT module 1. Turn OFF the power supply switch.

2. Discharge all four electrolytic capacitors completely.

3. Execute continuity test with a tester.

MCC-1438

Soldered

surface

Heat sink IGBT side

C10 C11 C12 C13

Tester rod

UVW UVW

WVUWVU

or more

100k to 300k

200k to 300k

Case that product is good

BZ BY BX BW

BV BU

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W V U