icomfort Touch
7−Day Programmable Communicating Thermostat
Page 33
Bold
text indicates a tab, button, or text display on the thermostat.
Table 5. Troubleshooting Tips
No.
Corrective Action / Comments
Possible Cause
Issue / Problem
13
The icomfort thermostat shows
an error code related to the out-
door sensor and or the DAS
even after removing these op-
tional accessories.
The outdoor sensor and
discharge sensor are op-
tions, however if the sys-
tem was setup with the
sensor in place, the icom-
fort system will see an
open sensor reading if it is
disconnected.
− Disconnect the outdoor sensor or discharge sensor.
− Using the installer program, reset the system by select-
ing
setup
tab and follow the screen prompts as the ther-
mostat goes through a new
system discovery
.
14
The icomfort thermostat will not
provide me a choice to add a
non−communicating heat pump
to a gas furnace.
The icomfort system does
not have the ability to con-
trol a non−communicating
heat pump on a dual fuel
system.
Replace the icomfort thermostat with a conventional ther-
mostat that has a dual fuel control mode (e.g. Lennox
ComfortSense
7000).
15
During
system discovery
, the
thermostat displays a message
Thermostat is unable to com-
municate to system compo-
nents
.
The thermostat was not
successful in communicat-
ing to the indoor unit.
− Verify the indoor unit has a icomfort communicating con-
trol.
− Check wiring connections at R, i+, i− and C at the indoor
unit and thermostats.
− Check R, i+. I− , C wires for open/shorts.
16
Temperature or humidity calibra-
tion does not respond to calibra-
tion changes.
Temperature/Humidity cal-
ibration changes will
change display 1ºF or 1%
RH every 3 minutes.
Allow the system to stabilize and complete the calibration
mode due to the time delay. A 5ºF calibration change will
take 15 minutes to calibrate the display.
17
The installer adjustable settings
used to configure the system are
not listed in the equipment tab
under the
Thermostat
49W95
(only
Temp Reading Calibra-
tion
and
Humidity Reading
Calibration
are listed as menu
items).
The adjustable system
configuration settings are
listed in the
equipment
tab
under
System 49W95
.
− In the installer program select the
equipment
tab and
choose
System 49W95
from system device and press
edit
.
− Over 25 installer adjustable settings are provided includ-
ing balance point, humidification control, dehumidification
modes, stage differentials and delays.
18
During the cooling mode the dis-
played air volume on the indoor
control is substantially lower than
expected.
The system may be follow-
ing "the cooling ramping"
profile or may be in the de-
humidification mode".
− During the default cooling ramping profile the blower will
run for 7.5 minutes at 82% of the cooling air volume. If
the "cooling ramping profile" is selected, the system will
ramp to 100% after 7.5 minutes.
− The dehumidification mode will run the system at 70% of
the cooling air volume which will be in addition to the air
volume reduction provided during the ramping profile.
During the dehumidification mode, a "
d
" will be displayed
on the furnace or air handler control.
19
The Indoor unit is not providing
the expected air volume accord-
ing to the cfm shown on the in-
door unit control.
− Indoor unit air volume set-
tings in the icomfort ther-
mostat are not correct.
− System is operating in the
cooling mode and follow-
ing the cooling ramping
profile or dehumidification
air volume.
− In the installer program select the
equipment
tab and
choose the furnace or air handler from the
system de-
vices
list and press
edit
. Verify/set the correct air volume
for heating and cooling modes.
− If in the cooling mode check for cooling ramp mode or
dehumidification mode as in #18.
20
− No second stage cooling is pro-
vided on a icomfort outdoor
unit.
− Space temperature is above
second stage differential and
has run is first stage a long
time.
− No red
Critical Alert
icon or
alert is displayed in the home-
owner
alert
tab.
The red
Critical Alert
icon
and homeowner
alert
tab
do not display non−critical
alerts.
− Go to the installer program
alert
tab to view all alerts and
details about those alerts.
− Look for alert code 401 (LSOM Compressor Long On
Cycle) which indicates compressor ran more than 18
hours continuous and will lock out 2nd stage compres-
sor.
− Cycle indoor power off and back on, alert code 401 will
clear within a few minutes.
