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ComfortSense
t
Model L7742U Touch Screen 7−Day Programmable Thermostat
Action to Clear / Recovery
Condition
System Action
Display Text (Screen2)
Display Text (Screen1)
Condition
ERROR MESSAGE
Humiditrol and Dew point
disable and Outdoor sen-
sor reads out of range (in-
staller setting OUTDOOR
SENSOR 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
sensor). User can also use CLEAR
to erase the error.
Hum sensor error (With
Humidifier or Dehumidifi-
er): conditions are
0%:
Stat will detect
error
0−10%:
Stat may detect
error
10−90%: Normal opera-
tion
90−93%: Stat may detect
error
93%:
Stat will detect
error
HUM SENSOR ERROR
REMIND SERVICE
See
REMIND/SERVICE
notes
All the humidity operation will stop
and the reading for humidity will not
be valid. This message indicates
something seriously wrong with the
thermostat.
The display of Indoor Humidity from
HOME will be turned OFF. If user
turns it on again, the error is dis-
played.
Replace Thermostat
Hum sensor error (With-
out Humidifier or Dehu-
midifier): sensor reads out
of range 0% to 100%
HUM SENSOR ERROR
REMIND SERVICE
See
REMIND/SERVICE
notes
The reading for humidity will not be
valid. This message indicates
something seriously wrong with the
thermostat.
The display of Indoor Humidity from
HOME will be turned OFF. If user
turns it on again, the error is dis-
played.
Replace Thermostat
L input detection
HVAC ERROR DETECTED
REMIND SERVICE
See
REMIND/SERVICE
notes
Message is displayed in the infor-
mation display area. Outside unit
may stop working.
If the L signal is removed, the mes-
sage is cleared. OR User can call
the dealer.
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