White Rodgers 1F90-71 manual Switch

24 VAC power is not being supplied to the thermostat and the thermostat is operating on battery power only.

•AUDIO PROMPTING — Each time you press a button, the thermostat will beep.

•BACKLIT DISPLAY — When you press any button on the thermostat, the display is lit for approximately eight seconds.

•SYSTEM INDICATOR LIGHT — The red light on the upper right part of the thermostat indicates system operation (see PARTS OF THE THERMOSTAT).

•COMPRESSOR SHORT CYCLE PROTEC- TION — To protect your compressor from potential damage due to rapid cycling, this thermostat has a built-in delay of 5 minutes between cooling cycles. The following may cause a time delay in COOL:

a)Return of power after a power outage.

b) Pressing SYSTEM to change operating

SWITCH

modes.

c)Pressing , creating a call for COOL too soon after a previous call.

•TOTAL KEYPAD LOCKOUT—WhenGroup A option switch #1 is in the total keypad lockout position (ON), programs cannot be altered and all buttons are disabled (see next page for illustration).

NOTE

Programming should be completed and batter- ies should be installed before changing Group A option switches #1 or #2.

17