Fault Diagnostics
23
Revision 1.0 - 7-May-02
HUB24 Series Dimmer
Operating Manual
5.8
Fault finding guide
FAULT SYMPTOM
POSSIBLE CAUSE
REMEDY
Playback or Build are active
See sections 4.2.9 and 4.2.31
One or more channels don’t respond
to DMX control.
DMX start channel is set incorrectly
Change DMX start channel
DMX cross patch is set incorrectly
Change DMX cross patch
Not receiving DMX signal
Check console and cabling,
remove upstream terminators
Dimmer channel fault
Factory service
Breaker trips when channel flashed
Large incandescent load
Preheat the lamp
Excessive load
Reduce channel loading
Hot breaker
Improve ventilation to breakers
or reduce ambient temperature
Faulty breaker
Factory service
Excessive load
Reduce channel loading
Breaker trips after prolonged
operation
Lamp or wiring fault
Check lamps and wiring
Hot breaker
Improve ventilation to breakers
or reduce ambient temperature
Faulty breaker
Factory service
Output short
Check lamps and wiring
Breaker trips immediately when
channel is driven
Massive load
Reduce channel loading
Dimmer channel fault
Factory service
One or more channels flicker
when dimmed
Current limit reached
Reduce the load on that phase
Adjust current limit setting to a
higher value (see 4.2.6)
Recalibrate current (see 4.2.21)
DMX line not terminated
Terminate DMX line (see 4.2.3)
DMX source problem
Use upstream opto-isolator
Replace control console
Replace DMX wiring
Dimmer channel fault
Factory service
Insufficient or non-linear load or
intermittent load wiring
Check if same load flickers on a
different channel
Mains control tones exceed limits
Contact factory
