Lennox EL23XCV Series Manual page 40

TABLE 7. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes
NOTE – System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/dehumidifi-
cation). Only the latest active fault or lockout codes are displayed (if present). If no fault or lockout codes are active, then system status codes are
displayed. Alert codes are also displayed on the S30/S40 thermostat.
Inverter LED Flash Code
Alert Inverter
(number of flashes)
Codes Code
Red LED
E601 N/A N/A
Priority
Green LED
Outdoor unit has been cycled
N/A Minor OFF on low temperature
protection.
Alarm Description
Low temperature protection: Outdoor unit will not operate when
the outdoor temperature is at or below 4°F (20°C). If the unit is
operating and the outdoor temperature drops below 4°F (20°C),
the unit continues to operate until the room thermostat is satisfied
or the outdoor temperature drops to 15°F (26°C). Outdoor unit
ambient sensor provides temperature readings.
Page 40
Possible Causes and Clearing Alarm