iComfort
Wi‐Fi
®
7-Day Programmable Communicating Thermostat
21
Table 1. Alert Codes and Troubleshooting
Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in
the Installer alert button. Minor and Moderate alerts are found only in the Installer alert
button.
Alert
Code
Steps to clear
Alert Text
Priority
31
Critical
(Thermostat) The thermostat has lost com
munication with the
(furnace, airhandler or
outdoor unit)
for more than 3 minutes.
[
Indicated unit
] has not communicated with thermostat for more than 3 minutes. Check
connections. Ohm wires. If fault persists, then cycle power. Fault clears after communica
tion is restored.
32
Moderate
(Thermostat) The
(furnace, airhandler or
outdoor unit)
is resetting itself.
[
Indicated unit
] is resetting itself. This event may occur during a power outage or power
fluctuation in the system. If persistent or if it coincides with the system operation then
proceed with the following steps. Check the power connections, check the amp draw at
the transformer (the transformer maybe overloaded) and check 24VAC voltage at the
DEVICE. The alarm is only cleared by pressing the clear button on the Installer Alerts Tab.
If the fault persists after checking the connections, replace the unit's control board.
34
Critical
(Thermostat) The thermostat does not know
the capacity (tonnage) of the
(furnace,
airhandler or outdoor unit)
. Please program
the correct capacity of the
(furnace,
airhandler or outdoor unit).
[
Indicated unit
] is missing the programmed unit capacity. Go to [
Indicated unit
] and pro
gram the unit capacity manually. See the unit IOM for programming instructions. Remove
power to thermostat before programming the unit control board. Once programming is
complete, reconnect thermostat wires and reconfigure system.
36
Critical
(Thermostat) The system has been heating
for at least 15 minutes, without a demand for
heating.
Run the system in diagnostic mode and verify that it matches actual equipment operation.
Check for other alarms/codes that may be preventing the system from operating as ex
pected.
Step 1: Check all heating equipment to determine cause of heating demand.
Step 2: Recycle power.
System will clear code when it detects condition has cleared.
37
Critical
(Thermostat) The system has been cooling
for at least 15 minutes, without a demand for
cooling.
Run the system in diagnostic mode and verify that it matches actual equipment operation.
Check for other alarms/codes that may be preventing the system from operating as ex
pected.
Step 1: Check all cooling equipment to determine cause of cooling demand.
Step 2: Recycle power.
System will clear code when it detects condition has cleared.
38
Critical
(Thermostat) The system has not been able
to turn on the heating for more than 45
minutes. The system will go offline for 60
minutes and try again.
Run the system in diagnostic mode and verify that it matches actual equipment operation.
Check for other alarms/codes that may be preventing the system from operating as ex
pected.
Step 1: Check all heating equipment to determine cause.
Step 2: Recycle power.
System will clear code when it detects condition has cleared.
