Failure of Lamp to Ignite
In the event of the xenon lamp failing to light the following steps should be taken:
1)
Check that the mains supply is connected to the input of the PSU. On operating the switch,
if the lamp does not light switch off mains supply and check all fuses;
2)
If the lamp still does not ignite, check the searchlight head. On your command get an
operator to activate the starting switch for approximately 5 seconds. During this time listen
for any noise (cracking or hissing) coming from within the barrel. If this arcing is heard
switch off the supply at the mains. Remove the rear dome to expose the two supply leads
to the xenon lamp. Using a dry cloth wipe these leads to remove any dust, moisture or
condensation that may have formed around the inside of the barrel. Replace the rear
dome, ensuring the latches are secure, and perform the check again, listening for the
cracking. If the lamp still fails to ignite, switch off at the mains and replace the xenon lamp
in accordance with the safety procedures with
in this manual and the manufacturers’
information.
Any further tests to be carried out with regards to lamp failure must be conducted by a
competent electrical engineer and should not be carried out in an explosive atmosphere.
3)
Before a xenon lamp will ignite, the electrically insulated gas between the electrodes must
be ionised. This is done by the ignitor which produces a high frequency voltage (up to
32,000 volts or higher). The ignitor is activated by switching the lamp on and a crackling or
hissing noise should be heard. The ignitor is housed within the rear of the searchlight
barrel. This is a totally encapsulated unit and repair is not advised. If found to be faulty a
new ignitor must be fitted.
