Page 80
XP25
Intelligent Power Module
Converter
Heat Sink
Power Factor
Correction
Circuit
Communication Control
Figure 61. 4- and 5-Ton Unit Inverter
STATUS CODES:
Table 20. Outdoor Control 7-Segment Display Alert Codes, DC Inverter and Outdoor Control 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
®
thermostat.
Alert
Codes
Code
Inverter LED Flash Code
(number of flashes)
Priority Possible Causes and Clearing Alarm
Red LED Green LED
N/A N/A ON OFF N/A XC/XP 25-024 and -036 only: Indicates inverter is operating normally.
N/A N/A ON ON N/A XC/XP 25-048 and -060 only: Indicates inverter is operating normally.
N/A N/A OFF OFF N/A Indicates inverter is NOT energized.
ERROR CODES:
Table 21. 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
®
thermostat.
Alert
Codes
Code
Inverter LED Flash Code
(number of flashes)
Priority Alarm Description Possible Causes and Clearing Alarm
Red LED Green LED
E 423 40 4 flashes OFF
Moderate /
Critical
The inverter has detec
ted a circuit problem
.
Control locks out after 10 strikes within an hour. To
clear, disconnect power to outdoor unit and re
start.
E 426 N/A N/A N/A Critical
Excessive inverter
alarms
After ten faults within one hour, control is locked
out, indicating poor system operation. Review his
tory of alarms to resolve system setup. Check con
denser fan motor, TXV, indoor unit blower motor,
over-charge, undercharge, or clogged refrigerant
filter.
To clear error, disconnect power to outdoor unit
and restart. Inverter alarms 12 to 14 and 53 do not
count towards this lock out condition.
E 427 21 2 flashes 1 flash
Moderate /
Critical
The inverter has detected a DC peak fault condition. If condition (55A or high
er) is detected, outdoor unit compressor and fan stop. Anti-short cycle is initi
ated. If peak current (55A or higher) occurs 10 times within an hour, system is
locked out. Indicates high pressure, condenser fan failure, locked compressor
rotor or overcharge. To clear, disconnect power to outdoor unit and restart.
Table 21. 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
®
thermostat.
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