DOCUMENT 1218
REV. B
Instruction Manual
AGS-LED
312 LED Series
300mm and 400mm
15
10.5
Troubleshooting
Follow the steps below to find the root cause of sign issues. During troubleshooting or
maintenance operations, if it is necessary to open the electronics enclosure, it is imperative that
the lid be properly refastened at the completion of the operation. Do not remove the captive
screws from inside the lid. Replacement parts will be required for testing the different
components of the sign, see
Table 17, pg. 90
, for replacement part information.
WARNING:
WARNING
Do not open the electronics enclosure while the sign is powered.
Dangerous voltage may be present on the input of the power supply(s).
Contact Crouse-Hinds Airport Lighting for assistance prior to
operating a failed sign. There may be dangerous voltage present on
the input AC pins of the power supply.
10.5.1 Visual Inspection
DANGER:
DANGER
Energy sources must be
Locked Out
and de-energized prior to opening
the electronics enclosure, disconnecting power cables, reconnecting
power cables, or servicing electronics on an aircraft guidance sign.
Disconnecting/connecting power cables or servicing sign electronics
without locking out your energy source and de-energizing your power
circuit can result in severe injury or death. Note, the sign is equipped
with an optional On/Off switch; power is present at the switch
terminal even when the switch is in the “Off” Position.
Lock Out
electrical power prior on the On/Off switch, if removing its guard or
servicing the switch.