Lennox XP25-024-230-01 Installation And Service Procedure page 81

Inverter LED Flash Code
Alert
(number of flashes)
Code
Codes
Red LED
E 428 22 2 flashes
E 429 23 2 flashes
E 431 27 2 flashes
E 432 28 2 flashes
E 433 29 2 flashes
Priority
Green LED
Moderate /
2 flashes
Critical
Moderate /
3 flashes
Critical
Moderate /
7 flashes
Critical
Moderate /
8 flashes
Critical
Moderate /
9 flashes
Critical
Page 81
Alarm Description
If condition is detected, is detected, outdoor unit
compressor and fan stop. Anti­short cycle is initi­
ated. If condition occurs 5 times within an hour,
The inverter has detec­ system is locked out.
ted a high main input cur­
Indicates high pressure, condenser fan failure or
rent condition
.
overcharge.
To clear, disconnect power to outdoor unit and re­
start.
On a call for compressor
Issues:
operation, if DC link
power in inverter does
(1) If DC link power in inverter does not rise
not rise above 180 VDC
above 180 VDC for 2- and 3-ton models, 250
for 2 and 3 ton models,
VDC for 4- and 5-ton models, within 30 seconds,
250 VDC for 4 and 5 ton
the outdoor control will display a moderate code.
models, within 30
seconds, the control will
(2) Capacitors on inverter do not properly charge.
display a moderate code.
Corrective Actions:
If condition is detected,
outdoor unit will stop
(1) check for proper main power to outdoor unit
(Compressor and fan).
and for any loose electrical connections.
Anti-short cycles is initi­
ated. If condition occurs
(2) Outdoor control boards with part # 103686-03
10 times within a 60
have software update to delay the de-energizing
minute rolling time period,
of the reversing valve by four seconds when com­
system will lock out and
ing out of defrost.
display a critical code.
Error occurs when PFC
Issues:
detects an over-current
(1) Indicates power interruption, brownout, poor
condition of 100A, the
electrical connection or loose inverter input wire.
control will display a
moderate code. If condi­
(2) System testing was set up and code was gen­
tion is detected, outdoor
erated when the reversing valve is de-energized
unit will stop (Com­
coming out of defrost (code appears with or
pressor and fan). Anti-
without 30 compressor delay).
short cycle is initiated. In­
Corrective Actions:
verter is unavailable to
communicate with the
(1) Check for proper main power to outdoor unit
outdoor control for 3
and for any loose electrical connections.
minutes. If condition oc­
curs 10 times within a 60 (2) Outdoor control boards with part # 103686-03
minute rolling time period, have software update to delay the de-energizing
of the reversing valve by four seconds when com­
system will lock out and
ing out of defrost.
display a critical code.
Error occurs when the DC link capacitor voltage is
greater than 480VDC. If condition is detected, out­
The inverter has detec­
door unit compressor and fan stop. Anti­short
ted a DC link high voltage cycle is initiated. If condition occurs 10 times within
condition.
an hour, system is locked out. System stops. To
clear, disconnect power to outdoor unit and re­
start.
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 inverter has detected
the current remains high, outdoor unit compressor
a compressor over-cur­
and fan stop. Anti­short cycle is initiated. If condi­
rent condition
.
tion occurs 5 times within an hour, system is
locked out. To clear disconnect power to outdoor
unit and restart.
Possible Causes and Clearing Alarm
XP25