Lennox iComfort Wi-Fi Setup Manual page 62

Table 10. Alert Codes and Troubleshooting
Alert PRIORITY
Code CONDITION
Moderate /
429
Critical
Moderate /
430
Critical
Moderate /
431
Critical
Moderate /
432
Critical
507343-01
APPLICABLE
SYSTEM ALERT TEXT
COMPONENTS
The inverter has detected a DC
Outdoor unit
link low voltage condition
Outdoor unit Compressor start-up failure
The inverter has detected a PFC
Outdoor unit
circuit over-current condition
The inverter has detected a DC
Outdoor unit
link high voltage condition.
Critical alerts are displayed on the Home screen, in the Home­
owner alert button, and in the Installer alert button. Minor and
moderate alerts are found only in the Installer alert button.
COMPONENT OR SYSTEM OPERA­
TIONAL STATE AND TROU­
BLESHOOTING TIP
•
On a call for compressor opera­
tion, 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) – moderate condition.
•
.
An anti-short cycle timer is initiat­
ed. If condition occurs 10 times
within a 60 minute rolling time pe­
riod, system will lock out and dis­
play alert code 429 – critical
condition.
•
The outdoor control anti-short cy­
cle timer will time out and the unit
will recycle the demand.
•
Replace outdoor inverter.
•
If condition is detected, outdoor
unit will stop (compressor and
fan) – moderate condition.
•
Anti-short cycle is initiated.
•
If condition occurs 10 times within
an hour, system will lockout –
critical condition.
•
Error occurs when PFC detects
an over current condition of 100A
peak.
•
If condition is detected, outdoor
unit will stop (compressor and
. fan) – moderate condition.
•
Anti-short cycle timer is initiated.
•
If condition occurs 10 times within
an hour, system will lockout –
critical condition.
•
Error occurs when the DC link ca­
pacitor voltage is greater than
480VDC.
•
If condition is detected, outdoor
unit will stop (compressor and
fan) – moderate condition.
•
Anti-short cycle timer is initiated.
•
If condition occurs 10 times within
an hour, system will lockout –
critical condition.
Page 62
HOW TO CLEAR
ALERT CODE
Automatically clears
when the system de­
tects that the issue no
longer exists.
To clear, disconnect
power to outdoor unit
and restart.
To clear, disconnect
power to outdoor unit
and restart.
To clear, disconnect
power to outdoor unit
and restart.