Fault

Cause

Remedy

 

 

 

HTI lamp dark after ignition

Thermofuse in ballast

Switch on unit for cooling

 

or in lamp housing has reacted

(without switching on HTI lamp).

 

 

Allow 2 minutes for cooling off, then briefly switch

 

 

off and on with mains switch. Re-ignite HTI lamp.

 

Ventilation fans not operating

Call service engineer.

 

 

 

HTI-Lamp “ON” but not functioning

Master Control Knob not in “0” position

Turn Master Control Knob to “0” position

 

Electronics disturbed

Carry out mains reset.

 

 

Switch unit off for approx. 30 seconds.

 

 

Then switch on again and start new ignition attempt.

 

 

If this fails, call service engineer.

 

HTI lamp defective

Replace HTI lamp

 

 

(experienced personnel only).

 

Fuse defective

Call service engineer.

 

 

 

Keyboard illumination and/or display dark

Control voltage failure

Call service engineer

 

 

 

Trouble-Shooting

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