Lennox iComfort Wi-Fi Setup Manual page 50

Table 10. Alert Codes and Troubleshooting
Alert PRIORITY
Code CONDITION
206 Critical
207 Critical
223 Critical
224 Critical
225 Critical
226 Critical
227 Moderate
228 Moderate
507343-01
APPLICABLE
SYSTEM ALERT TEXT
COMPONENTS
The furnace gas valve second-
Furnace
stage relay is faulty.
The furnace hot surface igniter
Furnace
is open.
The furnace low pressure
Furnace
switch is open.
The furnace low pressure
Furnace
switch is stuck closed.
The furnace high pressure
Furnace
switch is failing to close.
The furnace high pressure
Furnace
switch is stuck closed.
The furnace low pressure
Furnace
switch is open in run mode.
The furnace control is not able
to calibrate the pressure
Furnace
switch.
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
•
Furnace will operate on first-stage
for the remainder of the heating
demand
•
If unable to operate second-
stage, replace furnace control.
•
Measure the resistance of hot
surface igniter.
•
Replace the igniter if it is not with­
in the specified range found in fur­
nace installation instruction.
•
Check pressure (inches w. c.) of
the low pressure switch closing
during a heat call.
•
Measure operating pressure
(inches w. c.).
•
Inspect vent and combustion air
inducer for correct operation and
restriction.
•
Check operation of low pressure
switch to see if it is stuck closed
for longer than 150 seconds dur­
ing a heat call.
•
Measure operating pressure
(inches w. c.).
•
Inspect vent and combustion air
inducer for correct operation and
restriction.
•
Check pressure (inches w. c.) of
high pressure switch closing dur­
ing a heat call.
•
Measure operating pressure
(inches w. c.).
•
Inspect vent and combustion air
inducer for correct operation and
restriction.
•
Check operation of high pressure
switch closing during a heat call.
•
Measure operating pressure
(inches w. c.).
•
Inspect vent and combustion air
inducer for correct operation and
restriction.
•
Check pressure (inches w. c.) of
low pressure switch closing dur­
ing a heat call.
•
Measure operating pressure
(inches w.c.).
•
Inspect vent and combustion air
inducer for correct operation and
restriction.
•
Unable to perform pressure
switch calibration.
•
Check vent system and pressure
switch wiring connections.
•
Check the drain trap for blockage.
Page 50
HOW TO CLEAR
ALERT CODE
Automatically clears
after the issue is cor­
rected.
Automatically clears
after the issue is cor­
rected.
Automatically clears
after the issue is cor­
rected.
Automatically clears
after the issue is cor­
rected.
Automatically clears
after the issue is cor­
rected.
Automatically clears
after the issue is cor­
rected.
Automatically clears
after the issue is cor­
rected.
Automatically clears
after a successful cali­
bration.