Lennox ComfortSense L7742U

506180−01 09/08
Page 22
Mes
sage
Type
Action to Clear /
Recovery
ConditionSystem ActionPriority
Display Text
(Screen2)
Display Text (Screen1)Condition
Error Hum sensor
error (With Hu-
midifier or De-
humidifier):
conditions are
0%:
Stat will detect
error
0−10%:
Stat may de-
tect error
10−90%:
Normal opera-
tion
90−93%:
Stat may de-
tect error
93%:
Stat will detect
error
HUM SENSOR ERROR
REMIND SERVICE
See
REMIND / SERVICE
notes
1−Critical All the humidity opera-
tion will stop and the
reading for humidity will
not be valid. This mes-
sage indicates some-
thing seriously wrong
with the stat.
The display of Indoor
Humidity from HOME
will be turned OFF. If
user turns it on again,
the error is displayed.
User calls the dealer
and has a new sensor
installed OR the sen-
sor reads back in nor-
mal range.
Error Hum sensor
error (Without
Humidifier or
Dehumidifier):
sensor reads
out of range
0% to 100%
HUM SENSOR ERROR
REMIND SERVICE
See
REMIND / SERVICE
notes
1−Critical The reading for humidity
will not be valid. This
message indicates
something seriously
wrong with the stat.
The display of Indoor
Humidity from HOME
will be turned OFF. If
user turns it on again,
the error is displayed.
User calls the dealer
and has a new sensor
installed OR the sen-
sor reads back in nor-
mal range.
Error L input detec-
tion
HVAC ERROR DETECTED
REMIND SERVICE
See REMIND / SER-
VICE notes
1−Critical Message is displayed
on the dot Part. Outside
UNIT may stop working.
If the L signal is re-
moved, the message
is cleared. OR User
can call the dealer.
Media Filter REPLACE MEDIA FILTER
REMIND RESET
See REMIND / RE-
SET notes
2−Moder-
ate
Displayed on both lines
on HOME.
User either Hit RESET
or REMINDER button
on HOME
s
UV Lamp REPLACE UV LAMP
REMIND RESET
See REMIND / RE-
SET notes
2−Moder-
ate
Displayed on both lines
on HOME.
User either Hit RESET
or REMINDER button
on HOME
R
eminders
Humidity Pad REPLACE HUM PAD
REMIND RESET
See REMIND / RE-
SET notes
2−Moder-
ate
Displayed on both lines
on HOME.
User either Hit RESET
or REMINDER button
on HOME
R
e
Routine sys
check up
ROUTINE SYS CHECK−UP
REMIND RESET
See REMIND / RE-
SET notes
2−Moder-
ate
Displayed on both lines
on HOME.
User either Hit RESET
or REMINDER button
on HOME
Metal Insert for
Pure Air
REPLACE METAL INSERT
REMIND RESET
See REMIND / RE-
SET notes
2−Moder-
ate
Displayed on both lines
on HOME.
User either Hit RESET
or REMINDER button
on HOME
Status
2
Low battery
warning (when
24Vac is pres-
ent)
Note: When
battery V" is
low but we
have 24Vac
wires then it is
low priority er-
ror
LOW BATTERY
REMIND
See REMIND notes 3.5−Minor Message is displayed
on the dot Part.
User can hit REMIND
to get rid of the mes-
sage for 7 days. But
replacing battery is re-
quired.
table continued on next page