Lennox iComfort Wi-Fi Setup Manual page 55

Table 10. Alert Codes and Troubleshooting
Alert PRIORITY
Code CONDITION
352 Critical
353 Critical
354 Critical
355 Critical
370 Critical
Moderate / Equipment inter­
380
Critical
Moderate / Equipment inter­
381
Critical
Equipment inter­
382 Moderate
®
iComfort Wi-Fi
APPLICABLE
SYSTEM ALERT TEXT
COMPONENTS
There is a problem with the air-
handler's second stage electric
Air handler
heat.
There is a problem with the air-
handler's third stage electric
Air handler
heat.
There is a problem with the air-
handler's fourth stage electric
Air handler
heat.
There is an issue with the air-
handler's fifth stage electric
Air handler
heat.
The furnace control has not re­
ceived 24VAC power for two
Furnace
minutes or more on the DS ter­
minal
Interlock relay failure (IFC or
AHC mode only).
face module
Interlock relay stuck (IFC or
AHC modes only)
face module
Relay W1 failure (IFC and AHC
modes only)
face module
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
TIONAL STATE AND TROU­
BLESHOOTING TIP
•
Either the pilot relay contacts did
not close or the relay coil in the
electric heat section did not ener­
gize.
•
The air-handler will operate on
first stage electric heat until the
issue is resolved.
•
Either the pilot relay contacts did
not close or the relay coil in the
electric heat section did not ener­
gize.
•
The air-handler will operate on
first stage electric heat until the
issue is resolved.
•
Either the pilot relay contacts did
not close or the relay coil in the
electric heat section did not ener­
gize.
•
The air-handler will operate on
first stage electric heat until the
issue is resolved.
•
Either the pilot relay contacts did
not close or the relay coil in the
electric heat section did not ener­
gize.
•
The air-handler will operate on
first stage electric heat until the
issue is resolved.
•
The system will not operate.
•
Dealer has cut the W914 jumper
(Dehum, Harmony III)
•
The thermostat monitors the DS
terminal in the furnace for power
and if the link has been cut then
power will be lost to DS.
•
Interlock relay is energized, but
input is not sensed after three
seconds.
•
There will be no heating or cool­
ing due to this alert code – mod­
erate condition.
•
De-energize interlock relay and
energize after five minutes if de­
mand is still present – critical
condition.
•
Interlock relay continuously
sensed (with relay off).
•
There is no heating and cooling
operation – moderation condi­
tion.
•
After 10 minutes if event still exist
it will be escalated – critical con­
dition.
W1 relay is energized but input is not
sensed after three seconds.
7-Day Programmable Communicating Thermostat
Page 55
HOW TO CLEAR
ALERT CODE
Automatically clears
after fault recovered.
Automatically clears
after fault recovered.
Automatically clears
after fault recovered.
Automatically clears
after fault recovered.
This alert code will
clear when 24VAC is
continuously sensed
on DS terminal for a
minimum of 10 sec­
onds or on a power re­
set.
Automatically clears
after fault recovered.
Automatically clears
30 seconds after fault
clears.
Automatically clears
when W1 relay input is
sensed.