Lennox ComfortSense L7742U

ComfortSenset Model L7742U Touch Screen
7−Day Programmable Thermostat
Page 21
Mes
sage
Type
Action to Clear /
Recovery
ConditionSystem ActionPriority
Display Text
(Screen2)
Display Text (Screen1)Condition
Error Outdoor Sen-
sor error with
Humiditrol en-
able (OR ODT
was used for
balance point
control only):
outdoor sensor
reads out of
range (−50F to
180F)
NO OUTDOOR SENSOR
REMIND SERVICE
See REMIND / SER-
VICE notes
1−Critical No Humiditrol or Humid-
ity operation is run. D
terminal stays activated
and other operation will
keep working.
The display of Outdoor
sensor from HOME will
be turned OFF. If user
turns on the display
from USER SETTINGS,
this error is displayed
again.
If the outdoor sensor
reads a value within its
normal range. (User
can call the dealer to
replace outdoor sen-
sor)
Error Outdoor Sen-
sor error with
Dewpoint con-
trol enable:
outdoor sensor
reads out of
range (−50F to
180F)
NO OUTDOOR SENSOR
REMIND SERVICE
See REMIND / SER-
VICE notes
1−Critical No Dewpoint control or
Humidity operation is
run. D terminal stays
activated and other op-
eration will keep work-
ing.
The display of Outdoor
sensor from HOME will
be turned OFF. If user
turns on the display
from USER SETTINGS,
this error is displayed
again.
If the outdoor sensor
reads a value within its
normal range. (User
can call the dealer to
replace outdoor sen-
sor)
Error Humiditrol and
Dewpoint dis-
able and Out-
door sensor
reads out of
range (installer
setting OUT-
DOOR SEN-
SOR is set to
YES)
NO OUTDOOR SENSOR
REMIND CLEAR SERVICE
See
REMIND / CLEAR /
SERVICE notes
The display of Outdoor
sensor from HOME will
be turned OFF. If user
turns on the display
from USER SETTINGS,
this error is displayed
again.
NOTE: This error would
not occur if the system
is in Armchair program-
ming.
If the outdoor sensor
reads a value within its
normal range. (User
can call the dealer to
replace outdoor sen-
sor). User can also
use CLEAR to erase
the error.
Error Low battery
warning (when
no 24Vac and
system is
working on bat-
teries) : 30
days before
battery is dead,
the error
should be de-
tected.
LOW BATTERY
REMIND
See REMIND notes 1−Critical Message is displayed
on the dot Part
User can hit REMIND
to get rid of the mes-
sage for 7 days. How-
ever, replacing battery
is required.
table continued on next page