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Protection function has tripped (overcurrent)
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•
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T.U. ERROR LED
1st T.U. Error flashes:
The protection function is restricted; the protection
parameters are reset to the minimum values.
Cause:
•
2nd T.U. Error lights up continuously:
The protection function is not ensured.
Cause:
•
3WJ Air Circuit breakers
Operating Instructions, 12/2022, L1V30828903001-01
Indicator lights up when the "QUERY" button is
pressed
Only one reason for tripping is displayed
Only the last reason for tripping is displayed
Electronic trip unit defective
Electronic trip unit defective
Description
2.2 Electronic components
49
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