Lennox iComfort E30

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Table 16. Alert Codes and Troubleshooting
Initial notication of critical alerts will pop up on the home screen and will be listed under notication menu. Minor and moderate alerts are found only under the
notication menu.
Alert
Code
Priority
Condition
Applicable
System
Component(s)
Actual Displayed
Alert Text
Component or System Operational State and Troubleshooting Tip
How to clear alert
code
105 Critical Thermostat
Communication
Problem
A system component has lost communication with the system. System
component (device) is unable to communicate.
This may indicate the existence of other active alert codes.
In most cases errors are related to electrical noise. Verify that high voltage
power is separated from the low voltage communication wires.
Check for incorrectly wired or loose connections between system
components (devices).
Check for a high voltage source of noise close to the system.
Automatically clears
when the system
detects the issue no
longer exists.
110 Critical Furnace
Low AC Line
Voltage
The component AC line voltage is too low. This alert code may appear
during a brownout. It may also occur when line voltage is below its
designed operating value.
Check and correct the power line voltage.
Automatically clears
when the system
detects the issue no
longer exists.
115 Critical Thermostat
Low Secondary
(24VAC) Voltage
24VAC power to a system component control is lower than the required
range of 18 to 30VAC.
Check and correct voltage.
Check for additional power-robbing system components (devices)
connected to system.
This alert code may require the installation of an additional or larger VA
transformer
Automatically clears
when the system
detects the issue no
longer exists.
120 Moderate Thermostat
Unresponsive
DEVICE2.
There is a delay in the system component responding to the system.
Typically this alert code does not cause any operational issues and will
clear on its own.
This alert code is usually caused by a delay in the outdoor unit responding
to the thermostat.
Check all wiring connections.
Automatically clears
after an unresponsive
system component
(device) responds to
any inquiry.