Page 33
XP25
Table 6. 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
Inverter
Code
Inverter LED Flash
Code (number of
flashes)
Priority Alarm Description Possible Causes and Clearing Alarm
Red LED Green LED
E 429 23 2 flashes 3 flashes
Moderate
/ Critical
On a call for compressor op
eration, if DC link power in
inverter does not rise above
180 VDC for 2 and 3 ton
models, 250 VDC for 4 and
5 ton models, within 30
seconds, the control will dis
play a moderate code. If
condition is detected, out
door unit will stop (Com
pressor and fan). Anti-short
cycles is initiated. If condi
tion occurs 10 times within a
60 minute rolling time peri
od, system will lock out and
display a critical code.
Issues:
(1) If DC link power in inverter does not rise above 180
VDC for 2- and 3-ton models, 250 VDC for 4- and 5-ton
models, within 30 seconds, the outdoor control will dis
play a moderate code.
(2) Capacitors on inverter do not properly charge.
Corrective Actions:
(1) check for proper main power to outdoor unit and for
any loose electrical connections.
(2) Outdoor control boards with part # 103686-03 have
software update to delay the de-energizing of the re
versing valve by four seconds when coming out of de
frost.
E 430 26 2 flashes 6 flashes
Moderate
/ Critical
Compressor start failure.
If condition is detected, outdoor unit compressor and
fan stop. Antishort cycle is initiated. If condition occurs
10 times within an hour, system is locked out.
Indicates poor connection at compressor harness, im
proper winding resistance, locked compressor rotor, or
flooded compressor.
To clear, disconnect power to outdoor unit and restart.
E 431 27 2 flashes 7 flashes
Moderate
/ Critical
Error occurs when PFC de
tects an over-current condi
tion of 100A, the control will
display a moderate code. If
condition is detected, out
door unit will stop (Com
pressor and fan). Anti-short
cycle is initiated. Inverter is
unavailable to communicate
with the outdoor control for
3 minutes. If condition oc
curs 10 times within a 60
minute rolling time period,
system will lock out and dis
play a critical code.
Issues:
(1) Indicates power interruption, brownout, poor elec
trical connection or loose inverter input wire.
(2) System testing was set up and code was gener
ated when the reversing valve is de-energized coming
out of defrost (code appears with or without 30 com
pressor delay).
Corrective Actions:
(1) Check for proper main power to outdoor unit and
for any loose electrical connections.
(2) Outdoor control boards with part # 103686-03 have
software update to delay the de-energizing of the re
versing valve by four seconds when coming out of de
frost.
E 432 28 2 flashes 8 flashes
Moderate
/ Critical
The inverter has detected a
DC link high voltage condi
tion.
Error occurs when the DC link capacitor voltage is greater
than 480VDC. If condition is detected, outdoor unit com
pressor and fan stop. Antishort cycle is initiated. If condi
tion occurs 10 times within an hour, system is locked out.
System stops. To clear, disconnect power to outdoor unit
and restart.
E 433 29 2 flashes 9 flashes
Moderate
/ Critical
The inverter has detected a
compressor 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, outdoor unit compressor and fan stop. Antishort
cycle is initiated. If condition occurs five times within an
hour, system is locked out. To clear disconnect power to
outdoor unit and restart.
To Next Page
Loading...
