Lennox EL23XCV Series User Manual

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ERROR CODES:
TABLE 18. Outdoor Control 7-Segment Display Alert Codes – Outdoor Control Errors
NOTE - System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/dehumidi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.
Alert
Codes
Priority Alarm Description Possible Causes and Clearing Alarm
E 180
Moderate
/ Critical
The S30/S40 thermostat has found
a problem with the outdoor unit's
ambient temperature sensor.
During normal operation, after the outdoor control recognizes sensors, the alarm will
be sent only if valid temperature reading is lost. Compare outdoor sensor resistance
to temperature/resistance charts in unit installation instructions. Replace sensor pack
if necessary. At the beginning of (any) conguration, furnace or air-handler control
will detect the presence of the sensor(s). If detected (reading in range), appropriate
feature will be set as 'installed' and shown in the S30/S40 thermostat 'About' screen.
The alarm / fault will clear upon conguration, or sensing normal values.
E 182 Moderate
Suction Temperature Sensor has
malfunctioned
Sensor is open or shorted. Replace the Sensor
E 424 Moderate Faulty outdoor liquid line sensor Sensor is open or shorted. Replace the sensor.
DC Inverter Control Operation, Checkout, Status / Error Codes
OPERATION OF COMPONENTS:
Electromagnetic compatibility circuit (EMC): EMC ensures the correct operation of di󰀨erent equipment items which use or
respond to electromagnetic phenomena. It also helps to negate the e󰀨ects of interference.
CONVERTER:
Converts AC (alternating current) to DC (direct current).
POWER FACTOR CORRECTION (PFC) CIRCUIT:
The PFC module is an integrated part of the outdoor inverter that monitors the DC bus for high, low and abnormal voltage
conditions. If any of these conditions are detected, the PFC function and compressor will stop.
INTELLIGENT (INVERTER) POWER MODULE (IPM):
The IPM converts DC power into AC power. The control method is known as pulse width modulation (PWM). This means
the DC is switched on and o󰀨 very quickly (chopped) by the transistor switches to make simulated AC at required frequen-
cy and voltage.
COMMUNICATION CONTROL CIRCUIT:
Receives and sends message between the inverter and the outdoor control.
STATUS CODES:
TABLE 19. 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/dehumidi-
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.
Alert
Codes
Inverter LED Flash
Code (number of
ashes)
Prority Alarm Description Possible Causes and Clearing Alarm
Red LED
Green
LED
N/A ON OFF N/A EL23XCV-024, -036 only: Indicates inverter is operating normally.
N/A ON ON N/A EL23XCV-048, -060 only: Indicates inverter is operating normally.
N/A OFF OFF N/A Indicates inverter is NOT energized.

Lennox EL23XCV Series Specifications

General

Brand	Lennox
Model	EL23XCV Series
Category	Air Handlers
Language	English