Lennox iHarmony 10C16 User Manual

24
Table 24. 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
Actual
Displayed Alert
Text
Component or System Operational State and Troubleshooting Tip How Alert Code is Cleared
11 Critical Missing DEVICE2
The thermostat cannot nd 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.
Cycle system power, and If problem
persists then clear by reconguring
the system.
105 Critical
Communication
Problem
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.
Automatically clears when the
system detects the issue no longer
exists.
114
Moderate /
Critical
AC Line
Frequency /
Distortion Prob
There is a frequency / distortion problem with the power to a specic system component. There is a frequency /
distortion problem with the power to a specic 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 ve 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.
Automatically clears when the
system detects the issue no longer
exists.
115 Critical
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.
• Damper control module will operate in non-zone mode until proper voltage is restored.
Automatically clears when the
system detects the issue no longer
exists.
120 Moderate
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.

Lennox iHarmony 10C16 Specifications

General

Brand	Lennox
Model	iHarmony 10C16
Category	Control Unit
Language	English