Sharp QT-80W Instruction Manual download pdf (Page 81)

8.5.2 Brief Glimmer Problem:

Lamp does not start but there is a brief glimmer from one or both lamp (i.e.

the protective circuit in the ECG has responded at start-up).

Same behaviour even after being off for one minute (internal reset) and

restart

Possible cause:

a) At least one lamp has reached the end of its life owing to a cathode

break or increase in lamp voltage

Remedy:

Replace the lamp (for two-lamp ECGs we recommend replacing

both lamps at the same time to keep maintenance time and costs

to a minimum).

Possible cause:

b) Wiring faulty between ECG and lamp (output terminals not used or

reversed: contact problems in the holder or the terminals (e.g. wire

cross-section too small or too large)

Remedy:

Check the lamp-side wiring fo rcorrect contact. Has the lamp

connection been wired according to the wiring diagram on the

ECG? For two-lamp ECGs in particular, check that the common or

external connection is correctly wired.

Possible cause:

c) A lamp with the wrong wattage has been installed or, in the case of

two-lamp ECGs, only one lamp is installed or there are lamps of

different wattages

Remedy:

The wattage and type of lamp must correspond to the wattage and

type indicated on the ECG or the lamp/ECG combination should be

in line with OSRAM’s Indoor and Outdoor Lighting brochure. ECGs

designed for two-lamp operation must be operated with two lamps.

Possible cause:

d) The mains voltage lies outside the limit values indicated on the ECG

or in the data sheet

Remedy:

Check the voltage at the ECG and at source; check the wiring on

the mains side.

Possible cause:

e) The temperature at the measuring point of the ECG is too high (for

a brief description of the temperature at the ECG and lamp see end

of text)

Remedy:

The luminaire or site of installation should be modified to ensure

that the maximum recommended temperature is not exceeded

even in onerous conditions (high ambient temperature and/or high

supply voltage)

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Sharp QT-80W Instruction Manual Page 81

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