Lennox iComfort Wi-Fi Setup Manual page 46

Table 10. Alert Codes and Troubleshooting
Alert PRIORITY
Code CONDITION
105 Critical
110 Critical
111 Critical
112 Critical
113 Critical
507343-01
APPLICABLE
SYSTEM
COMPONENTS
Thermostat, fur­
nace, air handler,
outdoor unit,
A system component has lost
communication with the sys­
equipment inter­
tem.
face or IHarmony
damper control
module
The component line voltage is
Furnace
too low.
The component line power volt­
Furnace
age wiring is reversed.
The reporting component can­
Furnace
not find earth ground.
The line voltage is too high.
Furnace
Critical alerts are displayed on the Home screen, in the Home­
owner alert button, and in the Installer alert button. Minor and
moderate alerts are found only in the Installer alert button.
COMPONENT OR SYSTEM OPERA­
ALERT TEXT
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Page 46
TIONAL STATE AND TROU­
BLESHOOTING TIP
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 sys­
tem components (devices).
Check for a high voltage source
of noise close to the system.
This alert code may appear dur­
ing a brownout.
Line voltage is below its designed
operating value.
Check and correct the power line
voltage.
The unit is reporting that its power
and neutral lines are reversed.
Turn off the power to the system
and correct the line power voltage
wiring.
System resumes normal opera­
tion five seconds after critical
condition is recovered.
The thermostat will shut down the
system.
Provide proper earth ground to
the equipment.
System resumes normal opera­
tion five seconds after critical
condition is recovered.
Line voltage high (voltage higher
than nameplate rating).
Provide power voltage within
proper range.
System resumes normal opera­
tion five seconds after critical
condition is recovered.
HOW TO CLEAR
ALERT CODE
Automatically clears
when the system de­
tects the issue no
longer exists.
Automatically clears
when the system de­
tects the issue no
longer exists.
Automatically clears
when the system de­
tects the issue no
longer exists.
Automatically clears
when the system de­
tects the issue no
longer exists.
Automatically clears
when the system de­
tects the issue no
longer exists.