35
Table 2. Alert Codes and Troubleshooting
GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat
Alert
Code
Inverter
Flash
Code
Priority
Condition
Actual Displayed
Alert Text
Under dealer
control center >
Notifications
Component or System Operational State and Troubleshooting Tip
How to clear alert code
433
29
Service
Soon/Service
Urgent
OD Inverter
Compressor
Over-current
Compressor phase current is too high.
•
During initial startup, a six minute time delay is implement to prevent the alarm from occurring.
•
Error occurs when compressor peak phase current is greater than 28 amps.
•
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) – service soon condition.
• Cycle timer is initiated.
•
If condition occurs five times within 60 consecutive minutes, the system will lockout – service
urgent 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 Lennox communicating 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 catalog number 17D27 or newer 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
NOTE:
Inverter normal operations with no error code present is as follows. Red LED is ON and
Green LED is OFF.
To clear alert code disconnect power to
both the indoor and outdoor units and then
reconnect power. Restart system.
