Alarm 333 - Phase failure (Compressor)

What does 333 mean?

A compressor phase is missing, detected 3 times within 2 hours or continuously for 1 minute. This means the compressor is not receiving full power.

• Defective inverter.
• Disruption in supply voltage (missing phase to the Heat Pump/compressor).

Click steps to track your progress.

1. 1

   Check your home's main electrical panel for tripped circuit breakers or blown fuses related to the Heat Pump.

2. 2

   Ensure all main power switches for the Heat Pump are in the ON position.

3. 3

   If the alarm persists, contact a qualified electrician or NIBE service technician to check the electrical supply phases to the Heat Pump and the inverter.