Lennox iComfort S30 Installation And Setup Manual page 29

Table 1. Alert Codes and Troubleshooting
Applicable
Alert Priority
System
Code Condition
Components
18 Minor S30
19 Minor S30
29 Critical S30
30 Moderate S30
31 Critical S30
S30, furnace, air
handler or outdoor
32 Moderate
unit
34 Critical S30
Critical alerts are displayed on the Home 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 Text Component or System Operational State and Troubleshooting Tip
The outside temperature
" The system will not use the heat pump to warm your home.
is below the level where
" Outdoor temperature is below the low balance point.
the heat pump is pro­
grammed to heat the
" Heat pump will not be used to service a heating demand.
home.
" The system will only use the heat pump to warm your home
The outside temperature
is higher than the level
" This is a notification only alert code.
where the furnace or elec­
" Outdoor temperature is above the low balance point.
tric heat is programmed to
work. " Indoor unit (furnace or air handler) will not be used to service a heating demand.
The thermostat is reading
" Indoor temperature rose above 99ºF during a heating or cooling demand.
an indoor temperature that
" Heating operation is not allowed.
is higher than 99ºF. The
thermostat will not allow
" Check to ensure that heating equipment is not stuck ON (reversing valve, etc.).
any heating operation to
" Check the accuracy of the thermostat temperature sensor.
begin until it senses an in­
door temperature lower
" Select cooling system mode to cool the indoor space.
than 99ºF.
" The thermostat will not allow any cooling operation to begin until it senses a temper­
ature higher than 40ºF.
" Indoor temperature fell below 40ºF.
The thermostat is reading
" Cooling operation is not allowed.
an indoor temperature that
is lower than 40ºF. " 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.
" The applicable system component (indoor, equipment interface or damper control
The thermostat has lost module or outdoor unit) has not communicated with thermostat for more than three
communication with a
minutes.
system component for
" Check connections and voltages.
more than three minutes.
" Ohm wires.
This issue may occur during a power outage or power fluctuation in the system.
If persistent or if it coincides with the system operations then proceed with the follow­
ing troubleshooting steps.
The applicable system
" Check the power connections
component (device) is re­
" Check the amp draw at the transformer (the transformer maybe overloaded)
setting itself.
" Check 24VAC voltage at the system component (device).
If the fault persists after checking the connections, replace the unit's control board.
" The applicable system component is missing the programmed unit capacity.
" Go to applicable system component and program the unit capacity manually (see
The thermostat does not
the unit installation instruction for programming instructions).
know the capacity (ton­
nage) of the indoor or out­ " Remove power to thermostat before programming the unit control.
door unit.
" Once programming is complete, reconnect thermostat wires and reconfigure sys­
tem.
29
How to clear alert code
This is a notification only alert
code.
Automatically clears when the
system detects that the issue no
longer exists.
Automatically clears when the
system detects that the issue no
longer exists.
Automatically clears when the
system detects that the issue no
longer exists.
If fault persists, then cycle power.
Fault clears after communication
is restored.
This alert code is cleared by
pressing the clear button on the
Installer Alerts Tab.
Automatically clears when the
system detects that the issue no
longer exists.