Troubleshooting
AppController CARRIER CORPORATION ©2019
Installation and Start-up Guide All rights reserved
21
To replace the AppController's battery
To determine when to replace the battery, remove power and measure the voltage. If the voltage is below 2.9
volts, you need to replace the battery.
CAUTION Power must be ON to the AppController when replacing the battery, or your date, time, and trend
data will be lost.
1 Remove the battery from the controller, making note of the battery's polarity.
2 Insert the new battery, matching the battery's polarity with the polarity indicated on the AppController.
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