Routine maintenance – Honeywell UMC800 User Manual
Page 72
Maintenance
Routine Maintenance
64
UMC800 Controller Installation and User Guide
Release F
4/01
Routine Maintenance
Controller maintenance
Normal routine maintenance of the controller is not necessary other than a periodic physical inspection of
the controller enclosure and wiring for any signs of deterioration or dust and dirt.
Battery replacement
Replace the battery located on the CPU when the
LoBATT
LED lights or the low battery diagnostic is
indicated.
Also, It is recommended that the battery be replaced once a year to ensure back up power for the
RAM and the real time clock.
Refer to procedure in Replacing the battery (page 73) for specific
instructions.