Lennox iComfort Wi-Fi Setup Manual page 58

Table 10. Alert Codes and Troubleshooting
Alert PRIORITY
Code CONDITION
412 Moderate
413 Critical
414 Critical
415 Critical
416 Critical
507343-01
APPLICABLE
SYSTEM ALERT TEXT
COMPONENTS
The unit high-pressure is above
Outdoor unit
the required limit.
The high-pressure switch has
opened five times during a sin­
Outdoor unit
gle demand.
The discharge line temperature
is higher than the recommend­
Outdoor unit
ed upper limit of 279ºF.
The discharge line temperature
has been consistently higher
Outdoor unit
than the recommended upper
limit of 279ºF.
The outdoor coil sensor is ei­
ther open, short-circuited or the
Outdoor unit
temperature is out of sensor
range.
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
•
System is shut down
•
Unit high pressure is above the
upper limit.
•
The high pressure switch for
HFC­410A will open at 590PSIG
and close at 418PSIG.
•
Confirm that the system is proper­
ly charged with refrigerant.
•
Check outdoor fan motor, TXV,
indoor unit blower motor, stuck re­
versing valve and possible
clogged refrigerant filter.
•
Confirm that the outdoor unit is
clean.
•
Thermostat will shut down the
outdoor unit.
•
Open high pressure switch error
count reached five strikes.
•
Check system charge using ap­
proach and sub cooling tempera­
tures.
•
Check outdoor fan operation.
•
Check for dirt or debris blocking
air flow to outdoor unit.
•
Reset by putting outdoor unit con­
trol in test mode or resetting low
voltage power.
•
Discharge line temperature is
greater than 279ºF.
•
Make sure coil is clean and air­
flow unobstructed in and out of
condenser.
•
Check system operating pres­
sures and compare to unit charg­
ing charts in installation manual.
•
Discharge line high temperature
error count reached five strikes
during a single demand.
•
Make sure coil is clean and air­
flow unobstructed in and out of
condenser.
•
Check system charge using ap­
proach and sub cooling tempera­
tures.
•
Reset by putting outdoor control
in test mode or resetting low volt­
age power.
•
Outdoor unit control will not per­
form demand or time / tempera­
ture defrost operation. (System
will still heat or cool.)
•
Sensor being detected open or
shorted or temperature is out of
sensor range.
Page 58
HOW TO CLEAR
ALERT CODE
Automatically clears
after the high pressure
switch closes or a
power reset
Automatically clears
when the system de­
tects that the issue no
longer exists.
Automatically clears
after discharge tem­
perature is less than
225ºF.
Automatically clears
when the system de­
tects that the issue no
longer exists.
Automatically clears
when outdoor unit con­
trol detects proper
sensor readings.