Battery Replacement - Atlas Copco Air Contact Hardware Manual

10 Battery Replacement

The Lithium-ion battery used as backup supply power for the Chip GSM modem needs a replacement
after some years of continous work. To execute this service replacement only when there is a really need
a software algorithm will be implemented to evaluate the residual power capacity of the battery.
The algorithm use a measure of the battery discharge time. When the battery is not recharging but the Air
Contact is working it's residual charge continuosly reduces.
Measuring the speed of discharge and comparing it with a reference value then we can define an Event
Level that can activate a warning status. In warning status a service replacement could be activated.
The replacement is simple and could be executed without returning the module to the manufacturer.
Following is a sequence of operations to replace the battery into the Air Contact box.
1. Unscrew the two screws on the rear of the module (figure 1)
2. Pull the left cap, pay many attention (figure 2)
3. Disconnect the battery connector (figure 3)
4. Replace and connect again the battery (figure 4)
5. Close the left cap (figure 2)
6. To fix the left cap screwing the two screws on the rear of the module (figure 1)
Figure 1 Figure 2
Air Contact Hardware Manual
Figure 3 Figure 4
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