1.4.1 Fault finding chart
FAULT CAUSE REMEDY
Spring will not charge Motor has wrong or no Measure voltage on the
operating voltage motor leads.
Motor shaft broken Change motor
Motor gear damage Change motor
The latch for tripping Check mechanism
device does not function NOTE: Read safety
instruction in paragraph
1.3 before taking action
Disconnection in the wires Check by measuring.
Closing of breaker does not Operating coil does not pull Measure the voltage,
take place although there adjust the coils adjust-
is an indication that the ment screw.
springs are tensioned. Check breaker springs
Breaker closes then opens The toggle joint of the Adjust the toggle joint
again. mechanism are incorrectly
adjusted
Main circuit is wrong Find fault and adjust
Wrongly adjusted
clearance of opening Adjust
magnets armature
Breaker continuously opens Anti-pumping relay wrong Change relay
and closes
Breaker will not close Micro-switch arm wrongly Find fault and adjust
completely adjusted
Under-voltage relay Find fault and adjust
released.
(18)
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