Chapter 4 Maintenance; Hardware; Cooling - Honeywell CIU 888 Troubleshooting And Maintenance Manual

CHAPTER 4 MAINTENANCE

FIGURE 4-1
Part No.: 4417594_Rev11
Maintenance

4.1 Hardware

4.1.1 Cooling

To prevent the CIU 888 from overheating, it is recommended to clean
the heat sinks of the CIU 888 regularly to ensure a good air flow.
4.1.2 Lithium battery
The lithium battery built into the CIU 888 is used for powering the real-
time clock during power-off situations. The battery life is approximately
10 years.
CIU 888: Lithium battery
Troubleshooting & Maintenance Guide
CIU 888 4 - 1