Lennox L7742U Programming And Application Manual page 37

Message
Type
Condition Display Text (Screen1)
Error Outdoor Sensor error NO OUTDOOR SENSOR
with Dewpoint control
enable: outdoor sensor
reads out of range
(−50F to 180F)
Error Humiditrol and Dew- NO OUTDOOR SENSOR
point disable and Out- REMIND CLEAR SERVICE
door sensor reads out
of range (installer set-
ting OUTDOOR SEN-
SOR is set to YES)
Error Low battery warning
(when no 24Vac and
system is working on
batteries) : 30 days be-
fore battery is dead,
the error should be de-
tected.
Error Hum sensor error (With HUM SENSOR ERROR
Humidifier or Dehumidi-
fier): conditions are
0%:
Stat will detect error
0−10%:
Stat may detect error
10−90%:
Normal operation
90−93%:
Stat may detect error
93%:
Stat will detect error
Error Hum sensor error HUM SENSOR ERROR
(Without Humidifier or
Dehumidifier): sensor
reads out of range 0%
to 100%
Error L input detection HVAC ERROR DETECTED
Reminder Media Filter REPLACE MEDIA FILTER
Reminder UV Lamp
Display Text (Screen2)
See REMIND/SERVICE
REMIND SERVICE notes
See
REMIND/CLEAR/SERVICE
notes
LOW BATTERY See REMIND notes
REMIND
See
REMIND SERVICE REMIND/SERVICE
notes
See
REMIND SERVICE REMIND/SERVICE
notes
See REMIND/SERVICE
REMIND SERVICE notes
See REMIND/RESET notes
REMIND RESET
REPLACE UV LAMP See REMIND/RESET notes
REMIND RESET
Priority System Action
1−Criti- No Dewpoint control or Humidity operation is run. D termi-
cal nal 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.
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 Arm-
chair programming.
1−Criti- Message is displayed on the dot Part
cal
1−Criti- All the humidity operation will stop and the reading for hu-
cal midity 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.
1−Criti- The reading for humidity will not be valid. This message
cal 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.
1−Criti- Message is displayed on the dot Part. Outside UNIT may
cal stop working.
2−Mod- Displayed on both lines on HOME.
erate
2−Mod- Displayed on both lines on HOME.
erate
ComfortSenset Model L7742U Touch Screen 7−Day Programmable Thermostat
Page 37
Action to Clear / Recovery
Condition
If the outdoor sensor reads a val-
ue within its normal range. (User
can call the dealer to replace out-
door sensor)
If the outdoor sensor reads a val-
ue within its normal range. (User
can call the dealer to replace out-
door sensor). User can also use
CLEAR to erase the error.
User can hit REMIND to get rid of
the message for 7 days. However,
replacing battery is required.
User calls the dealer and has a
new sensor installed OR the sen-
sor reads back in normal range.
User calls the dealer and has a
new sensor installed OR the sen-
sor reads back in normal range.
If the L signal is removed, the
message is cleared. OR User can
call the dealer.
User either Hit RESET or RE-
MINDER button on HOME
User either Hit RESET or RE-
MINDER button on HOME
table continued on next page