Table of Contents
Advertisement
Initial notification of critical alerts will pop up on the home screen and will be listed under notification menu. Minor and moderate alerts are found only under the notification menu.
Actual
Alert
Priority
Displayed Alert
Code
Condition
Text
11
Critical
Missing DEVICE2
Communication
105
Critical
Problem
AC Line
Moderate /
114
Frequency /
Critical
Distortion Prob
Low Secondary
115
Critical
(24VAC) Voltage
Unresponsive
120
Moderate
DEVICE2.
Table 24. Alert Codes and Troubleshooting
Component or System Operational State and Troubleshooting Tip
The thermostat cannot find a previously installed system component.
• Check all system components (devices) connections to make sure they are Lennox communicating compatible.
• Cycle system power.
• If problem persists, then check all system components (devices) connections to make sure they are Lennox
communicating compatible.
• Go to menu > settings > advanced settings > view dealer control center > equipment and press reset all
equipment. This will allow the system to auto-detect any Lennox communicating components attached.
A system component (zone sensor for example) 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.
There is a frequency / distortion problem with the power to a specific system component. There is a frequency /
distortion problem with the power to a specific system component.
•
This alert code may indicate transformer overloading.
•
Check the voltage and line power frequency.
•
Check the generator operating frequency, if the system is running on back-up power.
•
Correct voltage and frequency problems.
•
System will resume normal operation five seconds after fault recovered.
•
All applicable system component outputs are disabled – moderate condition.
•
After 10 minutes, the priority condition is escalated – critical condition.
•
Damper control module will operate in central mode only until proper voltage is restored or frequency distortion
is resolved – moderate condition.
•
Set damper control module transformer jumper to system transformer. Check for proper wiring. Replace 40VA
furnace transformer with 70VA transformer. Re-commission system.
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.
•
Damper control module will operate in non-zone mode until proper voltage is restored.
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.
24
How Alert Code is Cleared
Cycle system power, and If problem
persists then clear by reconfiguring
the system.
Automatically clears when the
system detects the issue no longer
exists.
Automatically clears when the
system detects the issue no longer
exists.
Automatically clears when the
system detects the issue no longer
exists.
Automatically clears after an
unresponsive system component
(device) responds to any inquiry.
Hide quick links:
Advertisement
Table of Contents
