MCB LED-AIDED TROUBLESHOOTING CHART
NO
.
PROBLEM/RESULT CORRECTIVE ACTION
1
No operation of MCB or PCB
Verify connections, power switch and circuit
breaker.
2
No operation of MCB or PCB Replace MCB
3
PCB will not power up Replace MCB
4
PCB will power up but the MCB
will not operate
Verify adequate line voltage. If line voltage is
adequate, MCB is damaged and needs to be
returned to manufacturer.
5
Will not operate the motor
Verify connections to the P3 and the keypad. If the
connections look good, verify the 8-pin cable and
the keypad. If problem still persist, replace the
MCB.
6
MCB in current limit mode
The MCB is experiencing a discontinuous over
current events. Check for mechanical wear and/or
defective motor. If on mechanical wear and motor
good, replace MCB and return defective MCB to
manufacturer.
7
Will not operate the motor
Check and verify the P3 and P4 cables are good,
replace the PCB. If the problem persists, replace
the MCB.
8
Incline move up
9
Incline does not move
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