Troubleshooting
UC Open
CARRIER CORPORATION ©2019
Installation and Start-up Guide
All rights reserved
21
To replace the UC Open'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 UC Open 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 UC Open.
