507343-01
Page 62
Table 10. Alert Codes and Troubleshooting
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.
Alert
Code
PRIORITY
CONDITION
APPLICABLE
SYSTEM
COMPONENTS
ALERT TEXT
COMPONENT OR SYSTEM OPERA
TIONAL STATE AND TROU
BLESHOOTING TIP
HOW TO CLEAR
ALERT CODE
429
Moderate /
Critical
Outdoor unit
The inverter has detected a DC
link low voltage condition
.
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.
Automatically clears
when the system de
tects that the issue no
longer exists.
430
Moderate /
Critical
Outdoor unit
Compressor start-up failure
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.
To clear, disconnect
power to outdoor unit
and restart.
431
Moderate /
Critical
Outdoor unit
The inverter has detected a PFC
circuit over-current 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.
To clear, disconnect
power to outdoor unit
and restart.
432
Moderate /
Critical
Outdoor unit
The inverter has detected a DC
link high voltage 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.
To clear, disconnect
power to outdoor unit
and restart.
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