INM 725B Rev 21
7
Please note the CB7028POP1 white LED assembly is factory fitted with the half
circle in the top left hand corner as shown in Figure 1.5
If the LED assembly is inserted while power is applied to the system the LED may
blink when it is first inserted but will automatically return to the off state if no alarm
is present.
If it is inserted upside down, no damage will occur but the LED will not function.
WARNING !
Installation, configuration and maintenance of this annunciator must only
be performed by competent service personnel
WARNING !
Hazardous voltages may exist on the LED assembly connections accessed
via the front bezel. Take care and use insulated tools to remove and
replace LED assemblies.
To remove the LED assembly a pair of insulated pin-nosed pliers can be used on the
sides of the circuit board to gently pull the assembly towards you.
The number of LED’s required per window is governed by the window size.
• Small window versions use a single LED assembly
• Medium window versions use two LED assemblies
• Large window versions use four LED assemblies
1 .10 LED Failure Indication
The RTK 725B is equipped with LED monitoring to provide indication of total loss
of indication to a channel using the Watchdog, WD, LED mounted on the face of
the Pushbutton Module or the software diagnostic facility as described later in the
manual. As an option a common relay can be used to provide remote indication of
LED failure if required.
