Alert Code 434 — Communication error to main control

¿Qué significa 434 ?

Communication between the outdoor control and the inverter has been lost. The compressor will stop, and the indoor blower will not run. A critical condition occurs if this happens repeatedly.

• Loss of communication between outdoor control and inverter
• Incorrect power cycling during maintenance
• Loose wiring or connections

Haga clic en los pasos para seguir su progreso.

1. 1

   Inspect all electrical connections for looseness or disconnections.

2. 2

   Make sure power to the outdoor unit is not interrupted while the indoor unit is powered, and vice-versa.

3. 3

   To clear a critical lockout: cycle power off and on for the outdoor unit, then cycle power off and on for the indoor unit (24VAC to the Lennox outdoor control).