Lennox XP25-060-230-01 - Page 81

Page 81
XP25
Alert
Codes
Code
Inverter LED Flash Code
(number of flashes)
Priority Alarm Description Possible Causes and Clearing Alarm
Red LED Green LED
E 428 22 2 flashes 2 flashes
Moderate /
Critical
The inverter has detec
ted a high main input cur
rent condition
.
If condition is detected, is detected, outdoor unit
compressor and fan stop. Antishort cycle is initi
ated. If condition occurs 5 times within an hour,
system is locked out.
Indicates high pressure, condenser fan failure or
overcharge.
To clear, disconnect power to outdoor unit and re
start.
E 429 23 2 flashes 3 flashes
Moderate /
Critical
On a call for compressor
operation, 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
display a moderate code.
If condition is detected,
outdoor unit will stop
(Compressor and fan).
Anti-short cycles is initi
ated. If condition occurs
10 times within a 60
minute rolling time period,
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 display 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 reversing valve by four seconds when com
ing out of defrost.
E 431 27 2 flashes 7 flashes
Moderate /
Critical
Error occurs when PFC
detects an over-current
condition of 100A, the
control will display a
moderate code. If condi
tion is detected, outdoor
unit will stop (Com
pressor and fan). Anti-
short cycle is initiated. In
verter 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
display a critical code.
Issues:
(1) Indicates power interruption, brownout, poor
electrical connection or loose inverter input wire.
(2) System testing was set up and code was gen
erated when the reversing valve is de-energized
coming out of defrost (code appears with or
without 30 compressor 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 reversing valve by four seconds when com
ing out of defrost.
E 432 28 2 flashes 8 flashes
Moderate /
Critical
The inverter has detec
ted a DC link high voltage
condition.
Error occurs when the DC link capacitor voltage is
greater than 480VDC. If condition is detected, out
door unit compressor and fan stop. Antishort
cycle is initiated. If condition occurs 10 times within
an hour, system is locked out. System stops. To
clear, disconnect power to outdoor unit and re
start.
E 433 29 2 flashes 9 flashes
Moderate /
Critical
The inverter has detected
a compressor over-cur
rent condition
.
Error occurs when compressor peak phase cur
rent 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. Antishort cycle is initiated. If condi
tion occurs 5 times within an hour, system is
locked out. To clear disconnect power to outdoor
unit and restart.