3
FAN AUTOHRS
CHECK BATTERY
F
AM
MON
FAN AUTO
HEATHEAT
HRS
CHECK BATTERY
F
AM
MON WEDTHU FRI SATSUNTUEWEDTHU FRI SATSUNTUE
18 18
19 20 21
22
25
2324
Figure 1. The Display
LARLAR
LARLAR
LARGE LIGHTED (LGE LIGHTED (L
GE LIGHTED (LGE LIGHTED (L
GE LIGHTED (LCD) DISPLACD) DISPLA
CD) DISPLACD) DISPLA
CD) DISPLAYY
YY
Y
The thermostat display alternately shows
the current time and the current tempera-
ture on the left side. The display also
shows the temperature you have pro-
grammed or set on the right side of your
screen.
18 Displays system mode (HEAHEA
HEAHEA
HEATT
TT
T, OFFOFF
OFFOFF
OFF,
COOLCOOL
COOLCOOL
COOL, AA
AA
AUTUT
UTUT
UTOO
OO
O, HOLDHOLD
HOLDHOLD
HOLD, VV
VV
VAA
AA
ACA CA
CA CA
CA or
HUMDHUMD
HUMDHUMD
HUMD). During programming displays the
time period (MOR,MOR,
MOR,MOR,
MOR, D D
D D
DAA
AA
AYY
YY
Y
,,
,,
, EVE, EVE,
EVE, EVE,
EVE, NHT NHT
NHT NHT
NHT)
being programmed. In the configuration
menu, the menu item name is shown, one
word at a time (PRPR
PRPR
PRGMGM
GMGM
GM MODEMODE
MODEMODE
MODE, EMREMR
EMREMR
EMR,
COOLCOOL
COOLCOOL
COOL FF
FF
FAN AN
AN AN
AN DELADELA
DELADELA
DELA OFFOFF
OFFOFF
OFF, etc.).
19
CHECK BCHECK B
CHECK BCHECK B
CHECK BAA
AA
ATTERTTER
TTERTTER
TTERYY
YY
Y appears when the
“AA” alkaline batteries are weak and
should be replaced. BB
BB
BAA
AA
ATTERTTER
TTERTTER
TTERYY
YY
Y appears
when the thermostat is running on battery
power only. CHECK STCHECK ST
CHECK STCHECK ST
CHECK STAA
AA
AT T
T T
T appears when
the thermostat detects certain problems
within itself. CHECK SYCHECK SY
CHECK SYCHECK SY
CHECK SYSTEM STEM
STEM STEM
STEM appears
when the thermostat detects certain
problems in the heating or humidity
system.
20 Indicates the length of time remaining
in a temporary hold condition. Also
indicates the length of time remaining in
VACATION mode.
21 Displays FF
FF
FAN ONAN ON
AN ONAN ON
AN ON when the fan is
operating continuously. Displays FF
FF
FANAN
ANAN
AN
AA
AA
AUTUT
UTUT
UTOO
OO
O when the fan cycles with the
heating or cooling system.
22 Displays the setpoint temperature. In
HUMD mode, shows humidity setpoint.
23
Alternately displays room temperature
and time of day. In HUMD mode, shows
actual humidity.
24
Shows the current day of the week.
When programming, shows the day(s)
being programmed.
25 The word HEAHEA
HEAHEA
HEATT
TT
T or COOLCOOL
COOLCOOL
COOL will appear
above or below the setpoint if area 18 is
needed to display other information.
Introduction