DOCUMENT 1136
REV. G
Instruction Manual
Pro APF Series LED
ICAO TCL, IHP, & STP
12
9.10 Maintenance Program
In order to ensure maximum light unit life, the installed units should be subject to a maintenance program
in accordance with the following:
A daily operation check should be made of the lighting units. The lights should be energized and visually
inspected. If any units are out, the location of the unit should be recorded and the LED modules replaced at
a time when the circuit is de-energized. (See Section 9.2)
9.10.1
Regular cleaning is necessary to ensure that inset lighting units operate at maximum efficiency. The lens
and channel in front of the lens should be cleaned periodically with a soft cloth and solvent. The weather
and the location of the units will dictate the regularity and type of cleaning
.
9.10.2
Snowplow operators should exercise extra care not to strike the light units with snowplow blades. After
snow removal operations, inspect all light units to locate and replace if necessary, any damaged light units.
Passes over the light rows should be made with a power broom only if practical. Whenever snowplows
must traverse in-pavement light units, they should be traveling at less than 5 mph or have the blades lifted
clear of the units. Recommended snow removal techniques are described in AC 150/5200-23.
9.10.3
The light is designed to exclude both ground and surface water from entering. If the lights are not properly
maintained (i.e., bolts tightened and seals in good condition) water may enter the unit. To prevent this from
occurring, it is recommended that each unit be inspected for the presence of water at least once a month.
More frequent inspection is desirable during and following rainy seasons.
9.10.4
Optical assembly mounting bolts should be checked periodically for proper torque per section 8.4 and
whenever a unit is serviced regardless of the season. Light units in and around the touchdown zone area are
especially prone to vibration and shock damage if the mounting bolts are not properly torqued. The
mounting surface of the light base must be clean and free of foreign matter when checking mounting bolts.
9.10.5
If any light unit contains water, the water should be removed, and the entire light unit cleaned and dried.
Perform a pressure test per paragraph 9.6 to locate the source of the leak. Replace the optical housing o-
ring per section 9.3.
