Battery Replacement - Honeywell PRO 2000 Series Operating Manual

Operating Manual

Battery replacement

NOTE: Batteries are optional (serving as backup power) only if your
thermostat is connected to 24 VAC.
Set the System switch to Off before removing the
batteries. Otherwise, the heating/cooling system could
remain activated even when batteries are removed.
nstall two fresh AAA batteries when the low-battery icon
I
flashes on the screen. The icon appears for 60 days before the
batteries are depleted.
Replace batteries once a year, or when you will be away for
more than a month.
Most settings are stored in non-volatile (permanent) memory.
Only the clock and the day must be set if the thermostat was
without AC power or batteries.
NOTE: The low-battery icon will not appear when the batteries are
depleted if the thermostat is connected to 24 VAC.
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