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FAULT FINDING
• All outputs permanently off - power indicator off
Mains supply switched off
• All outputs permanently off - power indicator on
10 V enable connection missing
All low voltage inputs at 0 V
Lighting controller not powered
+15 V connection to lighting controller missing
• Output permanently off - led lights normally
Blown fuse - replace by correct type of fuse. Failed optoisolator
• Output permanently on - led lights normally
Failed triac (most likely) Failed optoisolator (least likely)
• Output permanently on - led permanently on
Analogue input 0 V connection missing
Low-voltage lighting controller output permanently on (measure input
voltage on terminal block)
• One Output permanently off - led permanently off
Break in wire of analogue input.
• All outputs permanently on, but turn off when all the
channels of the lighting controller are switched on
0V connection between controller and DP10000 broken or missing.
• Interference on sound system
Sensitive audio connections run too close to dimmer outputs. Live
and neutral to each channel run separately (live cable should be run
as close as possible to the neutral for the same channel).
Neutrals from various channels commoned. (Neutrals should be run
separately back to the dimmer pack)
• Flickering on low voltage lighting supplied by "electronic"
transformers
"Electronic" transformer not suitable for dimming.
• Motor speed remains constant, but stalls at low output
settings
Only certain types of motor may be speed controlled from a dimming
pack. Induction and synchronous motors cannot.
• Transformers fail in low-voltage lighting connected to the
dimming pack
Lamps are being flashed on and off too quickly. A "half-wave" failure
of a triac may damage transformers in low voltage lighting, if the low
voltage lighting is incorrectly fused.
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