OCEM LHI, Instruction Manual For Use, Installation And Maintenance

Page: 31 / 33

Document UT-MT-0693_EN Page 31 of 33
Edition 15/01/2020 Supersedes edition 08/01/2019
LED INSET HELIPORT LIGHT LHI
INSTRUCTION MANUAL FOR USE, INSTALLATION AND MAINTENANCE
Figure 27 - Lower Cover with Pressure Valve
5 TROUBLESHOOTING
Problem Possible cause Solution
Distorted light beam
output
Broken or damaged prism Replace prism
Wrong prism installed
CHECK PARTS LIST AND INSTALL
THE CORRECT PRISM
Weak light output
Primary loop with partial short
circuit
Check cable assembly
Defect in the isolation
transformer
Replace transformer
Dirty prism or dome Clean the light fixture
One LED of the luminous source
damaged in short circuit
Replace the LEDs board
Wrong power PCB installed
Check parts list and install the
correct PCB
Luminous source not
working
LEDS DEFECTIVE Replace the LEDs board
POWER PCB DEFECTIVE Replace the Power PCB
Moisture inside the fixture
Execute leakage test and replace
damaged components. Clean and
dry the inside area of the fixture
No connection of primary circuit
Check transformer output current
with A-meter
Defective isolation transformer or
secondary wiring
Check power line between the
light fixture and the transformer,
including connectors
Water or moisture inside
the fixture
Prism gasket, O-rings between
dome and lower cover Replace all gasket and execute
leakage test
Pinched fixture power cables Replace fixture leads