Lennox iComfort S30 Installation And Setup Manual page 60

Table 1 Alert Codes and Troubleshooting
Applicable
Alert Priority
System
Code Condition
Component(s)
413 Critical Outdoor unit
414 Moderate Outdoor unit
415 Critical Outdoor unit
Moderate /
416 Outdoor unit
Critical
Critical alerts are displayed on the Home screen, in the Homeowner alert button, and in the Installer alert button.
Minor and moderate alerts are found only in the Installer alert button.
Actual Displayed Alert
Component or System Operational State and Troubleshooting Tip
Text
The high pressure switch has opened five times during one cooling demand.
√ Thermostat will shut down the outdoor unit.
√ Open high pressure switch error count reached five strikes.
√ Check system charge using superheat and sub-cooling temperatures.
Hi Pressure Switch
Strikes Lockout
√ Check outdoor fan operation.
√ Check for dirt or debris blocking air flow to outdoor unit.
√ Reset by putting outdoor unit control in test mode or resetting low voltage
power.
The discharge line temperature is higher than the recommended upper limit
of 279ºF.
√ Discharge line temperature is greater than 279ºF.
High Discharge Line
Temperature
√ Make sure coil is clean and airflow unobstructed in and out of condenser.
√ Check system operating pressures and compare to unit charging charts in
installation manual.
The discharge line temperature has been consistently higher than the rec­
ommended upper limit of 279ºF.
√ Discharge line high temperature error count reached five strikes during a
single demand.
Hi Disch. Line Temp
Strikes Lockout √ Make sure coil is clean and airflow unobstructed in and out of condenser.
√ Check system charge using superheat and sub cooling temperatures.
√ Reset by putting outdoor control in test mode or resetting low voltage pow­
er.
The outdoor coil sensor is either open, short-circuited or the temperature is
out of sensor range.
√ Outdoor unit control will not perform demand or time / temperature defrost
operation. (System will still heat or cool.)
√ This fault is detected by allowing the unit to run for 90 seconds before
checking sensor resistance. If the sensor resistance is not within range af­
Outdoor Coil Sensor
ter 90 seconds, the control will display a moderate code.
Faulty
√ Advances from moderate to critical after ten (10) minutes.
√ Plug-in sensor harness correctly. (Refer to Service and Application Note
C-18-08)
√ Check resistance of sensor to determine if it is open, shorted, out of tem­
perature calibration or out of ambient temperature range. Replace if out-of-
specifications.
60
How to clear alert code
Automatically clears when the
system detects that the issue no
longer exists.
Automatically clears after dis­
charge temperature is less than
225ºF.
Correct issue and cycle power to
the system.
Automatically clears when outdoor
unit control detects proper sensor
readings.
If sensor is faulty and the system
is reporting the condition as criti­
cal, replaced sensor. Reset power
to clear alert code.