Operation Manual – AXA 2400 Compact – 30 - 90 kVA
Service, Maintenance, Overhaul
Document no. 578.650BB
Page 61 of 91
8.2
Battery back-up & replacement
Situated on the back of the control board, is a coin type lithium battery which ensures that Firmware /
Set-up data etc. are not lost during mains drop-outs. The expected life of the battery is approximately 7
years. However, a low battery voltage does not affect the internal safety system of the GPU that
monitors the output voltage, among others. Thus aircraft connected to the GPU are not exposed to any
danger. However to avoid loss of data and Control Board lock up *, we recommend changing the
battery after
5 years
of use.
To ensure high reliability of the back-up battery, the only type of battery that can be
used on the Control Board is the Panasonic BR-2032
How to change the battery:
Before removing the Control Board and to avoid any static discharge to the Control
Board during the replacement of the battery, please take ESD (Electro Static Discharge)
precautions.
Fig. 8.2.1 Control Board (front view)
To replace the battery,
Switch OFF
the unit
by means of Q1. Remove the Control Board from its 4
posts marked with a
in Figure 8.2.1. Place the PCB on an insulated surface, with the back side
face up.
Blue LED (D5)
