Lennox XC20-036-230-01 Installation And Service Procedure page 71

Converter
Power Factor
Correction
Circuit
STATUS CODES:
Table 17. 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/de­
humidification). 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 iComfort Wi-Fi
Inverter LED Flash
Code (number of
Alert
flashes)
Codes
Green
Red LED
LED
N/A ON OFF
N/A ON ON
N/A OFF OFF
ERROR CODES:
Table 18. 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/dehumidification).
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 iComfort Wi-Fi
Inverter
Code
Alert Inverter
flashes)
Code
Codes
Red LED
E 423 40 4 flashes
E 426 N/A N/A
Intelligent Power Module
Figure 52. 4- and 5-Ton Unit Inverter
Priority Alarm Description
N/A XC 20-024 and -036 only: Indicates inverter is operating normally.
N/A XC 20-048 and -060 only: Indicates inverter is operating normally.
N/A Indicates inverter is NOT energized.
®
®
or iComfort S30 thermostat.
LED Flash
(number of
Priority
Green LED
Moderate
The inverter has detected a
OFF
/ Critical circuit problem.
N/A Critical Excessive inverter alarms
Communication Control
®
or iComfort
Alarm Description
Control will lock out after 10 strikes within an hour. To
clear disconnect power to outdoor unit and restart.
After ten faults within one hour, control will lock out.
Indicates poor system operation. Review history of
alarms to resolve system setup. Check condenser fan
motor, TXV, indoor unit blower motor, stuck reversing
valve, over-charge, undercharge, and clogged refriger­
ant filter.
To clear error, disconnect power to outdoor unit and re­
start. Inverter alarms 12 to 14 and 53 do not count to­
wards this lock out condition.
71
Heat Sink
®
S30 thermostat.
Possible Causes and Clearing Alarm
Possible Causes and Clearing Alarm
XC20