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XP25
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
®
thermostat.
Alert
Codes
Inverter
Code
Inverter LED Flash
Code (number of
flashes)
Priority
Alarm Description
Possible Causes and Clearing Alarm
Red
LED
Green LED
E 430
26
2 flashes
6 flashes
Moderate /
Critical
Compressor start failure
.
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.
E 433
29
2 flashes
9 flashes
Moderate /
Critical
The inverter has detected a com
pressor over-current condition
.
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.
E 439
12
1 flash
2 flashes
Moderate
Compressor slowdown due to high
input current.
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.
E 440
13
1 flash
3 flashes
Moderate
Heat sink temperature is approach
ing limit. The compressor speed
automatically slows to reduce heat
sink temperature. The control sets
indoor CFM and outdoor RPM to
values according to demand per
centage 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.
E 441
14
1 flash
4 flashes
Moderate
Compressor slowdown due to high
compressor current. Compressor
current is approaching limit. The
compressor speed automatically
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..
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.
E 600
N/A
N/A
N/A
Critical
Compressor has been cycled OFF
on utility load shedding.
Load shedding function: Provides a method for
a local utility company to limit the maximum
power level usage of the outdoor unit.
