Lennox iComfort Wi-Fi Setup Manual page 63

Table 10. Alert Codes and Troubleshooting
Alert PRIORITY
Code CONDITION
Moderate /
433
Critical
Moderate /
434
Critical
Moderate /
435
Critical
®
iComfort Wi-Fi
APPLICABLE
SYSTEM ALERT TEXT
COMPONENTS
Compressor phase current is too
Outdoor unit
high.
Outdoor control has lost commu­
Outdoor unit
nications with the inverter for
greater than three minutes.
Outdoor unit Inverter internal error.
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
•
Error occurs when compressor
peak phase current is greater
than 28A.
•
Inverter will issue code 14 first
and slow down to try to reduce
the current.
•
If the current remains high, out­
door unit will stop (compressor
and fan) – moderate condition.
•
Anti­short cycle timer is initiated.
•
If condition occurs five times with­
in an hour, system will lockout –
critical condition.
•
Outdoor control has lost commu­
nications with the inverter for
greater than three minutes.
•
Outdoor control will stop all com­
pressor demands – moderate
condition.
•
Recycle power to the inverter by
de-energizing the contactor for
two minutes.
•
If this occurs three times in one
thermostat call, the outdoor unit
will locked out and display alert
code 434 – critical condition.
•
Check for loose or disconnected
electrical connections.
•
Interruption of main power to in­
verter.
•
When this error occurs, the out­
door control will cycle power to
the inverter by opening the con­
tactor for two minutes – moder­
ate condition.
•
Outdoor control will cycle power
to the inverter three times and
then outdoor unit is locked out –
critical condition.
7-Day Programmable Communicating Thermostat
Page 63
HOW TO CLEAR
ALERT CODE
To clear alert code dis­
connect power to out­
door unit and restart.
Automatically clears
when the system de­
tects that the issue no
longer exists.
To clear alert code dis­
connect power to out­
door unit and restart.