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Table 11. Troubleshooting Tips
No.
Issue / Problem
Determine the actual Software ver
13
sion of the thermostat or one of the
iComfort unit controls.
The iComfort thermostat shows an
error code related to the outdoor
14
sensor and or the DAS even after re
moving these optional accessories.
The iComfort thermostat will not
provide me a choice to add a non-
15
communicating heat pump to a gas
furnace.
During system discovery, the thermo
stat displays a message Thermostat
16
is unable to communicate to system
components.
Temperature or humidity calibration
17
does not respond to calibration
changes.
The installer adjustable settings used
to configure the system are not listed
in the equipment button under the
18
Thermostat (only Temp Reading Cal
ibration and Humidity Reading Calib
ration are listed as menu items).
During the cooling mode the dis
played air volume on the indoor con
19
trol is substantially lower than expec
ted.
The Indoor unit is not providing the
expected air volume according to the
20
cfm shown on the indoor unit control.
- No second stage cooling is
provided on a iComfort outdoor unit.
- Space temperature is above second
stage differential and has run in first
21
stage a long time.
- No red Critical Alert icon or alert is
displayed in the homeowner alert
button.
22
No weather being displayed.
Unable to complete Wi-Fi router / In
23
ternet connection
507152-01
Bold text indicates a button, or text display on the thermostat.
Possible Cause
iComfort software is stored in the
control and can be retrieved.
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.
The iComfort system does not have
the ability to control a non-commu
nicating heat pump on a dual fuel
system.
The thermostat was not successful
in communicating to the indoor unit.
Temperature/Humidity calibration
changes will change display 1ºF or
1% RH every 3 minutes.
The adjustable system configuration
settings are listed in the equipment
button under System.
The system may be following "the
cooling ramping" profile or may be in
"the De-humidification mode".
- 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.
The red Critical Alert icon and
homeowner alert button do not dis
play non-critical alerts.
®
iComfort Wi-Fi
not communicating
with router.
Refer to 507037-01 Wi-Fi Troubleshooting checklist for iComfort Wi-Fit thermostat.
Page 34
Corrective Action / Comments
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).
- 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.
Replace the iComfort thermostat with a conventional thermostat that has a
dual fuel control mode (e.g. Lennox ComfortSenset 7000).
- 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.
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.
- 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.
- 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.
- 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.
- 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.
Make sure Wi-Fi is enabled.
7/2013
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