Lennox icomfort Setup Manual page 35

Alarm ID Message Name
410 Open Low Pressure Switch
411 Low Pressure Switch Strikes Lockout
412 Open High Pressure Switch
413 High Pressure Switch Strikes Lockout
414 High Discharge Line Temperature
415 High Discharge Line Temperature Strikes Lock-
out
416 Outdoor Coil Sensor Faulty
417 Discharge Sensor Faulty
418 W Output Hardware Fault
419 W Output Hardware Fault Lockout
420 Defrost Out of Control
421 W External Miswire Alarm
530 Damper End Switch Failed to Close
531 Damper End Switch Failed to Open
532 Damper Control Module Alarm
594 Discharge Air Temperature Sensor Problem
700 Comfort Sensor Temperature Sensor Problem
701 Comfort Sensor Temperature Too High
702 Comfort Sensor Temperature Too Low
703 Comfort Sensor Humidity Sensor Problem
704 Comfort Sensor Humidity Too High
705 Comfort Sensor Humidity Too Low
Alarm Codes and Troubleshooting
Action required to Clear/Recover
Remove any blockages or restrictions from indoor coils and/or fans. Check refrigerant charge and system operation.
Check system charge using approach and sub cooling temperatures. Reset by putting outdoor board in test
mode or resetting low voltage power.
Check system operating pressures and compare to unit charging charts.
Check system charge using approach and sub cooling temperatures. Reset by putting outdoor board in test
mode or resetting low voltage power.
Check system operating pressures and compare to unit charging charts.
Check system charge using approach and sub cooling temperatures. Reset by putting outdoor board in test
mode or resetting low voltage power.
Sensor being detected open or shorted or out of temperature range. Board will not perform demand or time/tem-
perature defrost operation. (System will still heat or cool).
The board detects open sensor or out of temperature sensor range. This fault is detected by allowing the unit to
run for 90 seconds before checking sensor resistance. If the sensor resistances not within range after 90 sec-
onds, the board will count one fault. After 5 faults, the board will lockout.
Replace the control board.
Defrost longer than 20 minutes. Check HP operation.
Check and correct the wiring.
Repair/replace damper.
Repair/replace damper.
Check/replace if needed.
Check wiring. Ohm out sensor and check to temperature/resistance chart.
Recalibrate stat to clear, replace thermostat if needed.
Recalibrate stat to clear, cool down stat, adjust setpoint, replace thermostat if needed.
Recalibrate stat to clear, warm up stat, adjust setpoint, replace thermostat if needed.
Recalibrate stat to clear, adjust setpoint, replace thermostat if needed.
Recalibrate stat to clear, replace thermostat if needed.
Recalibrate stat to clear replace thermostat if needed.
Page 35
icomfortt Touch Screen 7−Day Programmable Thermostat