Your heat pump's internal control board has detected a communication or electrical fault with the motor that drives the system, meaning it cannot currently provide heating.

Inverter Error

What causes this fault?

This fault occurs when the main control board loses the ability to communicate with or power the motor that drives the heat pump. It is usually caused by a failure in the electrical components that manage the compressor's speed, or a physical electrical fault within the compressor itself. When this happens, the system cannot safely move heat into your home and will shut down to prevent further damage.