Outdoor Control 7-Segment Display Alert Codes - Compressor - Lennox XP25-024-230-01 Installation And Service Procedure

ERROR CODES:
Table 13. Outdoor Control 7-Segment Display Alert Codes - Compressor
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 LED Flash
Code (number of
Alert flashes)
Inverter
Codes Code
Red
LED
E 430 26 2 flashes
E 433 29 2 flashes
E 439 12 1 flash
E 440 13 1 flash
E 441 14 1 flash
E 600 N/A N/A
®
thermostat.
Priority
Green LED
Moderate /
6 flashes Compressor start failure
Critical
Moderate / The inverter has detected a com­
9 flashes
Critical
pressor over-current condition
Compressor slowdown due to high
2 flashes Moderate
input current.
Heat sink temperature is approach­
ing limit. The compressor speed
automatically slows to reduce heat
sink temperature. The control sets
3 flashes Moderate
indoor CFM and outdoor RPM to
values according to demand per­
centage rather than the actual Hz.
Alarm is automatically cleared.
Compressor slowdown due to high
compressor current. Compressor
current is approaching limit. The
compressor speed automatically
4 flashes Moderate slows. The control sets indoor CFM
and outdoor RPM to values accord­
ing to demand percentage rather
than the actual Hz. Alarm is auto­
matically cleared..
Compressor has been cycled OFF
N/A Critical
on utility load shedding.
Alarm Description
.
.
Page 63
Possible Causes and Clearing Alarm
If condition is detected, outdoor unit com­
pressor and fan stop. Anti­short cycle is initi­
ated. If condition occurs 10 times within an
hour, system is locked out.
Indicates poor connection at compressor har­
ness, improper winding resistance, locked com­
pressor rotor, or flooded compressor.
To clear, disconnect power to outdoor unit and
restart.
Error occurs when compressor peak phase
current is greater than 28A. Inverter issues
code 14 first and slows down to try to reduce
the current. If the current remains high, out­
door unit compressor and fan stop. Anti­short
cycle is initiated. If condition occurs 5 times
within an hour, system is locked out. To clear
disconnect power to outdoor unit and restart.
Input current is approaching a high limit. Com­
pressor speed automatically slows. The control
continues sending the inverter speed deman­
ded by the thermostat. The control sets indoor
CFM and outdoor RPM to values according to
demand percentage rather than the actual Hz.
Alarm is automatically cleared.
Issue: Feedback from supplier tear down of
inverter indicates that the screws that hold the
inverter to the inverter board were loose caus­
ing poor contact between these two compon­
ents.
Corrective action: Tighten screws that hold
the heat sink to the inverter control board.
NOTE: Wait 5 minutes to all capacitor to dis­
charge before checking screws.
Issue: Possible issue is system running at high
pressures. Check for high pressure trips or oth­
er alert codes in room thermostat and outdoor
control.
Load shedding function: Provides a method for
a local utility company to limit the maximum
power level usage of the outdoor unit.
XP25