Why can I see various brightness levels at different lamps?

Possibility 1: 

Cause: Lamps with different light colours or wattage have been fitted. 

Solution: Lamp types and wattages must comply with the type specified on the luminaire/supply unit. Light colour should be selected uniformly within an application.

Possibility 2:

Cause: Wiring between ECG/CCG and the lamp is faulty, perhaps contact problems exist.

Solution: Solution: Check wiring of the lamp on-site for correct contact. Check whether the lamps have been wired according to the specifications on the ECG/CCG.

Possibility 3:

Cause: The ECG is operated within a non-specified temperature range and attempts to achieve thermal relief (forced dimming) via power reduction of the lamp.

Solution: Check whether the ECG is operated above the specified temperatures at the affected lamp positions. Carry out constructive modifications to thermally relieve the device.

Why doesn't the lamp ignite?

The metal halide lamp does not ignite and no visible glow can be seen after switching on. With twin lamp devices both lamps do not ignite. Even after one minute of timeout, e.g. for a device-internal reset and renewed switching on, the same thing happens.

Possible causes:

   Possibility 1:

Cause: F1 (=residual current safety switch, FI safety switch or FI switch) or another protective device in the installation has been triggered. .

Solution: Check the wiring on the mains side; perhaps the isolation is damaged. Has the maximum permissible number of electronic ballasts per fuse with installation in 3 phase networks been exceeded? Ensure that the neutral conductor to all luminaires has been correctly connected. Possibly humidity has entered the luminaire, causing short-circuiting.

   Possibility 2:

Cause: Error in wiring on mains side.

Solution: Check whether the mains input voltage at the supply unit really exists according to the specified application area. Ensure that the neutral conductor to all luminaires has been correctly connected and is contacted. Ensure that all wires are correctly assigned in the terminals.

   Possibility 3:

Cause: The irreversible overload protection in the supply unit has triggered, meaning the ECG/CCG is permanently damaged.

Solution: Check whether the lamp(s) function at other lamp positions. If this is not the case then check the mains input voltage to ensure it is within the specification. When you are sure that the neutral conductor has been correctly connected and contacted, then supply unit and lamp(s) must be replaced.

Why is the lamp too bright or too dark?

Check whether the correct wattage for the luminaire is being used.

Why does the lamp flicker?

The lamp has reached its end of life and stable operation is no longer possible. Relamping is required.

Why is the glass bulb of the lamp black?

The lamp has reached its end of service life. Relamping is required.

Why does the luminaire switch itself off during operation?

• The supply unit is operated in surroundings that are too hot and switches off to avoid irreversible destruction. A mains interruption is required for a restart.
• The lamp has reached its end of life and stable operation is no longer possible. Relamping is required.