Honeywell SmartLine STIW400 - Replacing Batteries; When to Replace; Replacing 24 V External Power Module; Figure 8-1: Electronics Module Removal and Replacement

8. Maintenance/Repair
8.5. Replacing batteries
Revision 1 SmartLine Wireless Temperature and Universal I/O User's Manual 61
Figure 8-1: Electronics module removal and replacement
8.5 Replacing batteries
When to replace
When the transmitter displays a LOW BAT message you have 2-4 weeks to replace both
batteries before they reduce in performance. When batteries are removed or expired, all
transmitter data is retained in the transmitter’s non-volatile memory.
See section 5.1 for battery replacement procedure.
8.6 Replacing 24V external power module
When to replace
If the 24V power source should be replaced if the transmitter doesn’t power up or the output
voltage of the 24V supply is less than 7.5V.
See section 5.2 for 24V power supply module replacement procedure.