507428-01
30
Table 2. 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
29
Critical
(Thermostat) The thermostat is read
ing an indoor temperature that is high
er than 99ºF. The thermostat will not
allow any heating operation to begin
until it senses a temperature lower
than 99ºF.
Indoor temperature rose above 99ºF during a heating or cooling demand.
Heating operation is not allowed. Check to ensure that Heating Equipment is
not stuck ON (reversing valve, etc.). Check the accuracy of the thermostat
temperature sensor. Select cooling system mode to cool the indoor space.
30
Moderate
(Thermostat) The thermostat is read
ing an indoor temperature that is lower
than 40ºF. The thermostat will not al
low any cooling operation to begin un
til it senses a temperature higher than
40ºF.
Indoor Temp fell below 40ºF. Cooling operation is not allowed. Check to ensure
that cooling equipment is not stuck ON. Check accuracy of the thermostat
temperature sensor. Select heating system mode to heat the indoor space to
above 40ºF.
31
Critical
(Thermostat) The thermostat has lost
communication 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 communication 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 sys
tem operation then proceed with the following steps. Check the power connec
tions, check the amp draw at the transformer (the transformer maybe over
loaded) 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 program 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 recon
figure system.
