Failure of Lamp to ignite
In the event of the lamp failing to light the following steps should be taken:
1)
Check that the supply is connected to the input of the PSU and check all connections as
per the wiring diagram. On operation if the lamp does not light, switch off supply and check
all fuses;
2)
Check the igniter inside the searchlight. On your command get an operator to switch on the
light for approximately 2 seconds. During this time listen for any noise (cracking or hissing)
coming from within. If this arcing is heard switch off the supply. Remove the searchlight
body to expose the two supply leads from the PSU enclosure to the 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 body, ensuring the screws are securely
fastened, and perform the check again, listening for the cracking. If the lamp still fails to
ignite, switch off at the supply and replace the lamp in accordance with the safety
procedures within the manual and the manufacturer 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
14,000 volts or higher). Switching the lamp on activates the ignitor. A cracking or hissing
noise should be heard. The ignitor is housed within the searchlight head. If found to be
faulty return to Francis Searchlights Ltd for evaluation and repair.
Failure of Remote Focus
Causes
:
1)
Power not supplied;
2)
Faulty connections;
3)
Failed motor;
Remedy
:
1)
Check voltage at supply and the output from the control board in the searchlight. If no
supply present fault is at customer supply or speed controller board. If power is present,
see remedy 2;
2)
Check all wiring connections on motor in accordance with the wiring diagram. If found to be
correct, see remedy 3;
3)
Remove the focus motor and apply 24v DC directly across terminals. If motor does not
rotate the unit has failed. A new focus motor should be fitted.
