OCEM 3 Series Use And Maintenance Manual page 40

LED PAPI 66
Problems
Possible causes
When the bar is powered all the units light up, remain lit for 1-5 sec then switch off.
LED fault on a unit
(the system is designed to switch off
all the units when a unit has a number
of faulty LEDs greater than a certain
quantity)
When the bar is powered, a unit remains completely switched off, while the others light up and then switch off.
The CCR Interface Board is faulty
The LED Driver Board is faulty
Disconnected power supply cable
When the bar is powered, one or more units flashes.
When the bar is powered, all units remain switched off
40
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. Remove supply to the bar.
6. On the unit that faces the problem, open the electronic box and
check the internal connections.
7. Supply the bar.
8. If the problem persists, remove supply to the bar and replace
the LED Driver Board.
9. Supply the bar.
10. If the problem persists, remove supply to the bar and replace the
red LED module (according to the Paragraph 4.4).
11. Supply the bar.
12. If the problem persists, remove supply to the bar and replace the
white LED module (Paragraph 4.4).
ATTENTION: don't look directly inside the light source during
operation.
If after trying the proposed solutions the problem persists
contact OCEM Customer Service.
1. Remove supply to the bar.
2. Remove the external cover and open the electronic box.
3. Supply the bar.
4. Check that the green leds on the LED Driver Board are lit.
5. If they are off, disconnect the bar and replace the CCR Interface
Board.
6. Supply the bar
7. If the problem persists, replace the LED Driver Board.
8. If the problem persists, check the power cable and the connection
to the secondary of the isolation transformer.
If after trying the proposed solutions the problem persists,
contact OCEM Customer Service.
Contact OCEM Customer Service.
Contact OCEM Customer Service.
UT-MT-0972_1.0_19-09-2022 (EN)
Use and Maintenance Manual