Assistance in the event of problems

The connected LEDs or compact fluorescent lamps switch off in the lowest dimming position or flicker.

Cause

Remedy

Configured basic brightness is too low.

Increase basic brightness.

The connected lamps do not switch on in the lowest dimming position or switch on after a delay.

Cause

Remedy

Configured basic brightness is too low.

Increase basic brightness.

The connected LED or compact fluorescent lamps flicker or hum, no correct dimming is possible, dimmer hums.

Cause

Remedy

Lamps cannot be dimmed.

Check manufacturer's instructions.

Replace lamps with those of a different type.

Operating mode (dimming method) and lamps do not optimally match.

Check operation in another operating mode, reduce connected load as well if necessary.

Manually configure operating mode.

Replace lamps with those of a different type.

Dimmer is connected without neutral conductor.

Connect neutral conductor if possible; otherwise replace lamp with one of a different type.

The connected LED or compact fluorescent lamps are too bright in the lowest dimming position; dimming range is too small.

Cause

Remedy

Configured basic brightness is too high.

Reduce basic brightness.

Operating mode (dimming method) does not optimally match the connected HV LED lamps.

Check operation in another operating mode, reduce connected load as well if necessary.

Manually configure operating mode.

Replace HV LED lamps with those of a different type.

The dimmer switches the load off briefly and then back on again.

Cause

Remedy

Short-circuit protection has tripped; in the meantime there are no longer any errors.

Check installation.

The dimmer has switched off and cannot be switched on again.

Cause

Remedy

Overheating protection has tripped.

Disconnect dimmer from mains power supply, also switch off circuit breaker.

LED trailing edge phase control:
reduce connected load; replace lamps with those of a different type

LED leading edge phase control:
reduce connected load; check operation in the LED trailing edge phase control setting; replace lamps with those of another type.

Let dimmer cool down for at least 15 minutes.

Switch on dimmer and circuit breaker again.

Surge voltage protection has triggered.

LED trailing edge phase control:
check operation in the LED leading edge phase control, reduce connected load as well if necessary.

Replace lamps with those of a different type.

Short-circuit protection has tripped.

Disconnect dimmer from mains power supply, also switch off circuit breaker.

Eliminate short-circuit.

Switch on dimmer and circuit breaker again.

Note:
the short-circuit protection is based on an electronic fuse; the load circuit in the switched-off state is not electrically isolated from the power supply.

Load failure.

Check load.

Replace lamp.

With inductive transformers:
check primary fuse.

The LED lamp lights weakly when dimmer is switched off ("ghosting effect").

Cause

Remedy

LED lamp is not suitable for this dimmer.

Use LED lamp of a different type or manufacturer.

Connect neutral conductor to dimmer.