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4.8
Troubleshooting
Carefully read the manual, and in particular safety information, before proceeding with the
resolution of common faults.
Don't look directly inside the light source during operation
At the end of maintenance, carry out a function test of each unit.
Position a screen in front of LHA units (ex. a panel of paper/cardboard) and check that the
units work properly.
Check the proper light flow testing the power levels provided for by the model.
Problems
Possible causes
When the bar is powered all the units light up, remain lit for 10-30 sec, then switch off.
Tilt error of one unit.
(the system is designed to switch off all
the units when a unit has an inclination
going outside accessible limits)
UT-MT-0972_1.0_19-09-2022 (EN)
Use and Maintenance Manual
Possible solutions
1. Remove supply to the bar.
2. Remove the external cover and open the electronic box of any
unit.
3. Supply the bar.
4. On the LED driver board there is a red LED (D22): if steady on
it indicates that the fault is on the unit present, if it is flashing,
the number of flashes indicates the number of the faulty unit.
5. On the unit that faces the problem, check the tilt angle according
to the Paragraph 3.2 point 5, therefore restore the position of
the tilt error detector (Paragraph 3.2 point 6).
If after trying the proposed solutions the problem persists,
contact OCEM Customer Service.
LED PAPI 66
39
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