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- Fault code display (repeated three times)
continuously lit green: normal operation
1 yellow: serial fault
2 yellow: dimmer fault
3 yellow: parallel fault
4 yellow: overvoltage (>270 V)
5 yellow: temperature (>115°C)
6 yellow continuous yellow/red: internal error
Types arc fault-
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- serial fault: parallel fault:
More than just fire protection: one device, three functions
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Electric arcs and arc faults
in serial and parallel-
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Electric arcs can occur for operational reasons when opening or
closing mechanical contacts.
Arc faults can caused even minor damage insulation defects
on conducting lines. they unnoticed, they can become fire
risk the electrical installation. They not present any hazard.
If these dangerous arc faults keep occurring for days,
months even years, they exert thermal stresses the
surrounding material, which cause changes and,
in the worst-case scenario, can lead devastating fires. Parallel arc faults are detected by
miniature circuit-breakers and residual current circuit-breakers,
while serial arc faults can unnoticed AFD unit present
