507152-01
7/2013
Page 34
Table 11. Troubleshooting Tips
Bold
text indicates a button, or text display on the thermostat.
No.
Corrective Action / Comments
Possible Cause
Issue / Problem
13
Determine the actual Software ver
sion of the thermostat or one of the
iComfort unit controls.
iComfort software is stored in the
control and can be retrieved.
From the home screen click the right arrow
then click service info button; then click the thermostat info button; (display
shows model & serial numbers and hardware, software, Wi-Fi revision in
formation).
14
The iComfort thermostat shows an
error code related to the outdoor
sensor and or the DAS even after re
moving these optional accessories.
The outdoor sensor and discharge
sensor are options, however if the
system was setup with the sensor in
place, the iComfort system will see
an open sensor reading if it is dis
connected.
- Disconnect the outdoor sensor or discharge sensor.
- Using the installer program, reset the system by selecting
setup
button
and follow the screen prompts as the thermostat goes through a new
sys
tem discovery
.
15
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 control a non-commu
nicating heat pump on a dual fuel
system.
Replace the iComfort thermostat with a conventional thermostat that has a
dual fuel control mode (e.g. Lennox ComfortSense
7000).
16
During system discovery, the thermo
stat displays a message Thermostat
is unable to communicate to system
components.
The thermostat was not successful
in communicating to the indoor unit.
- Verify the indoor unit has a iComfort communicating control.
- Check wiring connections at R, i+, i- and C at the indoor unit and thermo
stats.
- Check R, i+. I- , C wires for open/shorts.
17
Temperature or humidity calibration
does not respond to calibration
changes.
Temperature/Humidity calibration
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.
18
The installer adjustable settings used
to configure the system are not listed
in the equipment button under the
Thermostat (only Temp Reading Cal
ibration and Humidity Reading Calib
ration are listed as menu items).
The adjustable system configuration
settings are listed in the equipment
button under System.
- In the installer program select the
equipment
button and choose
System
from system device and press
edit
.
- Over 25 installer adjustable settings are provided including balance point,
humidification control, De-humidification modes, stage differentials and
delays.
19
During the cooling mode the dis
played air volume on the indoor con
trol is substantially lower than expec
ted.
The system may be following “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 De-humidification 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 De-humidification mode, a “
d
” will be dis
played on the furnace or air handler control.
20
The Indoor unit is not providing the
expected air volume according to the
cfm shown on the indoor unit control.
- Indoor unit air volume settings in
the iComfort thermostat are not
correct.
- System is operating in the cooling
mode and following the cooling
ramping profile or De-humidifica
tion air volume.
- In the installer program select the
equipment
button and choose the fur
nace or air handler from the
system devices
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 De-humidification
mode as in #18.
21
- No second stage cooling is
provided on a iComfort outdoor unit.
- Space temperature is above second
stage differential and has run in first
stage a long time.
- No red
Critical Alert
icon or alert is
displayed in the homeowner
alert
button.
The red Critical Alert icon and
homeowner alert button do not dis
play non-critical alerts.
- Go to the installer program
alert
button to view all alerts and details about
those alerts.
- Look for alert code 401 (Compressor Long On Cycle) which indicates
compressor ran more than 18 hours continuous and will lock out 2nd stage
compressor.
- Cycle indoor power off and back on, alert code 401 will clear within a few
minutes.
22
No weather being displayed.
iComfort Wi-Fi
®
not communicating
with router.
Make sure Wi-Fi is enabled.
23
Unable to complete Wi-Fi router / In
ternet connection
Refer to 507037-01
Wi-Fi Troubleshooting checklist for iComfort Wi-Fi
t
thermostat.
