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16
Operation
Changing Batteries
When the AA batteries are low and need to be replaced, the battery symbol will appear on the LCD
screen, the current temperature will flash and a beep will sound every hour, it indicates that the batteries are
running low and have to be replaced immediately. However, it is recommended that the batteries be replaced
every year even if this warning does not appear.
To replace batteries:
• Select OFF to change the thermostat to OFF mode.
• Remove the thermostat from its mounting plate (back cover) carefully.
• Remove the old AA batteries, and install new ones.
• Place the thermostat back to its original position.
Memory backup for the Programs and Thermostat Settings
In case of power outages, this thermostat has a memory backup powered by a 3V (CR2025) lithium battery.
The lithium battery will typically last for several years. Memory storage includes all set programs and the
thermostat settings. Do not remove the lithium battery and the AA batteries at the same time, otherwise all
memory and settings will be lost.
If only the 3V (CR2025) lithium battery is low, the low battery symbol will flash slowly. This will not affect the
normal operation of the thermostat, but it should be replaced soon to ensure memory backup is maintained.
Use a screwdriver to remove and replace the lithium battery (see diagrams for the location of the lithium
battery).
Backlight
The backlight helps you to clearly see the thermostat display at night. However, frequent backlight use will
reduce your battery life. To disable the backlight, see the 'Optional Settings' section (Page 25).
Summary of Contents for M6004
Page 14: ...13 Buttons Operation...
Page 15: ...14 LCD Display Operation...