506230−01 05/09
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Controlling Heat/Cool Modes of Operation
On initial power up or after an a power loss
over 2 hours, the thermostat powers up at
the HOME screen in the AUTO position. If it
powers up after a power loss of less than 2
hours, it assumes the last mode set.
Pressing MODE repeatedly scrolls through
all the modesAUTO, EM HEAT, COOL,
HEAT, then back to OFF.
HEAT, COOL and OFF modes are as each name implies.
AUTO (autochangeover) allows the thermostat to switch
between Heating and Cooling, whichever mode is dictated
by the indoor temperature.
EM HEAT (emergency heat) bypasses the first stage of
heating (any stage[s] of heat pump heating) and goes
directly to the heat stage used for maximum heating to
more quickly warm a very cold house.
When the indoor temperature decreases or increases, the
HEATING or COOLING cycle will turn on based on the dis-
played mode. When the HVAC system is on, the INFOR-
MATION DISPLAY AREA (shown in figure 3) will display
one or several operational messages (listed in table 1). If
the outdoor sensor is connected and is turned on in user
settings, outdoor temperature will be included in the dis-
plays. The table below summarizes the information mes-
sages.
When the faults, errors, and service information displays
appear, dynamic keys will appear under the second line
entries, REMIND, CLEAR, SERVICE, or RESET. Press
the box to perform the action.
INFORMATION DISPLAY AREA
Figure 3. Home Screen
Table 1. Information Display Area
Faults, Errors, and Service Information
TEMP SENSOR ERROR, MEMORY ERROR
CALL FOR SERVICE
Top line: fault/error
Bottom line: action
NO OUTDOOR SENSOR
CALL DEALER INFO
Top line: fault/error
Bottom line: action
REPLACE: MEDIA FILTER; UV LAMP; HUM PAD; METAL INSERT
REMIND RESET
Top line: serv. req’d
Bottom line: action
ROUTINE SYS CHECK−UP
REMIND RESET
Top line: serv. req’d
Bottom line: action
NO OUTDOOR SENSOR, HUM SENSOR ERROR, HVAC ERROR DETECTED
REMIND SERVICE
Top line: fault/error
Bottom line: action
DEALER INFORMATION
(Edited to show dealer contact information [2 lines])
Contact
Installing Dealer
Operating Information
SET DATE/TIME
Default DATE/TIME (MON JAN 1 12:00 PM)
[First time start up msg]
HEATING, COOLING, HUMIDIFYING, DEHUMIDIFYING, SYSTEM OFF,
OUTDOOR TEMP xxF, INDOOR RH xx%,
MON SEP 24 3:OO PM
Top line: operation msgs
Bottom line: date & time
SCHEDULE ON, SCHEDULE OFF, WAIT, FAN ON, FAN CIRC
MON SEP 24 3:OO PM
Top line: operation msgs
Bottom line: date & time
HOLD SETTING UNTIL
MON SEP 24 3:OO PM
PRESS SCHED TO
RESUME PROGRAM
[Alternating msgs during a held schedule]
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