Lennox iComfort S30 Installation And Setup Manual page 54

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.
* Current Lennox modulating outdoor units are XC20, XP20, XC25 and XP25.
Applicable
Alert Priority
System
Code Condition
Component(s)
111 Critical Furnace
112 Critical Furnace
113 Critical Furnace
Furnace,
air handler,
Moderate /
114 equipment
Critical
interface or
IHarmony
Furnace,
air handler,
equipment
115 Critical
interface
module and
IHarmony
Furnace or Air
116 Critical
Handler
117 Minor Furnace
Thermostat,
furnace,
air handler,
outdoor unit,
120 Moderate
equipment
interface,
PureAir S or
IHarmony
Table 18. Alert Codes and Troubleshooting
Actual
Displayed Alert Component or System Operational State and Troubleshooting Tip
Text
The unit is reporting that its power and neutral lines are reversed.
Line Polarity
• Turn off the power to the system and correct the line power voltage wiring.
Reversed
• System resumes normal operation five seconds after critical condition is recovered.
The reporting component cannot find earth ground. The thermostat will shut down the system.
No Ground
• Provide proper earth ground to the equipment.
Connection
• System resumes normal operation five seconds after critical condition is recovered.
Line voltage high (voltage higher than nameplate rating).
High AC Line
• Provide power voltage within proper range.
Voltage
• System resumes normal operation five seconds after critical condition is recovered.
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.
AC Line
Frequency / • Correct voltage and frequency problems.
Distortion Prob
• 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.
24VAC power to a system component control is lower than the required range of 18 to 30VAC.
• Check and correct voltage.
Low Secondary
(24VAC) • Check for additional power-robbing system components (devices) connected to system.
Voltage
• 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.
• Thermostat will display this code when 24VAC power is high (18 to 30 VAC).
High Secondary
(24VAC) voltage
• Will display Furnace or Air Handler High Secondary (24VAC) voltage.
The reporting unit has poor earth grounding.
Poor Ground • Provide proper grounding for the system component (device).
• Check for proper earth ground to the system.
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.
Unresponsive
DEVICE2.
• This alert code is usually caused by a delay in the outdoor unit responding to the thermostat.
• Check all wiring connections.
54
How to clear alert code
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 when the
system detects the issue no
longer exists.
Automatically clears when the
system detects the issue no
longer exists.
Check and correct voltage.
Check for proper line voltage
(120V, 240V, etc.) to equipment.
Clears when control senses
proper voltage.
Automatically clears 30 seconds
after the issue is corrected.
Automatically clears after an
unresponsive system compo-
nent (device) responds to any
inquiry.