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Table 19. Alert Codes and Troubleshooting
Initial notification of critical alerts will pop-up on the home screen and will be listed under notification menu. Minor and moderate alerts are found only under the notification menu. Moderate alerts
are not e-mailed to Homeowners. Dealers will get an email and code can be seen on thermostat under the installer notification section.
NOTE:
Anytime the word
DEVICE
or
DEVICE2
is used in this table, it will be replaced on all alert code notification screens with the actual offending device name, for example, thermostat, heat
pump, etc.).
Alert
Code
Inverter
Flash
Code
Priority
Condition
Applicable
Component
Actual Displayed
Alert Text
Component or System Operational State and Troubleshooting Tip
433
29
Moderate /
Critical
Variable
capacity
outdoor unit*
OD Inverter
Compressor Over-
current
Compressor phase current is too high.
• Error occurs when compressor peak phase current is greater than 28A.
•
Inverter will issue inverter code 14 first and slow down to try to reduce the current.
• If the current remains high, outdoor unit will stop (compressor and fan) – moderate condition.
• Cycle timer is initiated.
•
If condition occurs 5 times within 60 consecutive minutes, the system will lockout – critical condition.
•
This alert code may be triggered by the inverter or the Lennox variable capacity outdoor (inverter controlled) unit.
•
Lennox outdoor control may trigger an this alert code if the inverter reduces the compressor speed which is identified as
a alert code 441 and the compressor speed (in hz) is below the minimum speed. This will typically occur at start-up. The
inverter automatically increases the compressor minimum speed below 45ºF in the heating mode and above 115ºF ensure
the compressor capacity is sufficient for oil return. If alert code 433 occurs and inverter does not indicate an inverter code 29,
the Lennox communicating Lennox outdoor control triggered the alert code 433.
>
Check the Lennox outdoor control software version by accessing the outdoor unit diagnostics section of the icomfort
thermostat. The Lennox outdoor control with software versions 1.27 and later have updated software that includes a six
minute time delay during the cooling mode and a 11 minute delay during the heating mode after receiving an alert code 433,
which typically occurs during start-up.
>
If the system is connected to the Internet, the Lennox outdoor control can be updated over the Internet. Make sure the
software “auto update” is enabled. The software “auto update” can be toggled to prompt the Lennox server to update the
thermostat which will update the Lennox outdoor control. If the system is not connected to the Internet, replace the Lennox
outdoor control with 103686-07 (17D27) or later version.
•
Inverter LEDs will flash code 29.
•
Refer to the unit service documentation for detailed troubleshooting procedures.
Inverter flash code 29. The sequence is:
• Red LED: Two Flashes
• Green LED: Nine Flashes
To clear alert code disconnect power to both the indoor and outdoor units and then reconnect power. Restart system..
