Caution – Lincoln Electric INVERTEC IM526-B User Manual

Page 17

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17

Step

4

Next

Test

Step

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5

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5

Test

Switch PC Board
resistance test.

No dynamic test
is possible.

Remove leads
401/403, 1/8, 9,
12, 4/5 and
402/404.

Repair Action

Replace Switch PC Board

Replace Switch PC Board

Replace Switch PC Board

Replace Switch PC Board

Replace Switch PC Board

Replace Switch PC Board

Replace Switch PC Board

Replace Switch PC Board

Replace Switch PC Board

Replace Switch PC Board

Replace Switch PC Board

Replace Switch PC Board

Check

Terminals on Switch
PC Board:
1/8 (pos) to
12 (neg)

1/8 (neg) to
12 (pos)

9 (pos) to
4/5 (neg)

9 (neg) to
4/5 (pos)

1/8 (pos) to
9 (neg)

1/8 (neg) to
9 (pos)

12 (pos) to
4/5 (neg)

12 (neg) to
4/5 (pos)

12 (pos) to
401/403 (neg)

12 (neg) to
401/403 (pos)

9 (pos) to
402/404 (neg)

9 (neg) to
402/404 (pos)

Test

Result

>1K ohms

<100 ohms

<100 ohms

>1K ohms

>1K ohms

<100 ohms

<100 ohms

>1K ohms

<100 ohms

>1K ohms

>1K ohms

<100 ohms

<100 ohms

>1K ohms

>1K ohms

<100 ohms

>1K ohms

<100 ohms

<100 ohms

>1K ohms

<100 ohms

>1K ohms

>1K ohms

<100 ohms

Conclusion

OK

Short

OK

Open

OK

Short

OK

Open

OK

Open

OK

Short

OK

Open

OK

Short

OK

Short

OK

Open

OK

Open

OK

Short

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, con-
tact your local Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

CAUTION

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