Carrier PTACSTAT-NP-HP - Manual (Page 19)

19
Display backlighting
The display has two levels of lighting, high level and continuous low level. High
level lighting comes on for 10 seconds any time a button is pressed. Continuous
low level lighting is only available if the thermostat is operated from 24VAC. It
is not available with batteries. Continuous low level backlighting is a
configurable option (see configuration settings above).
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A08089
Fig. 6 -- On screen indicators
On--Screen Indicators
1 Fan mode -- on or auto
2 Thermostat mode is off
3 Current Setpoint or Room temperature (if configured to display room temp)