Fault 33 — Flow sensor HP error

What does 33 mean?

The system detects an issue with the flow sensor specific to the heat pump circuit, meaning it cannot accurately measure water flow through the heat pump.

• Faulty flow sensor.
• Loose or corroded wiring connections to the sensor.
• Low water pressure or flow in the heat pump circuit.
• Air in the system.

Click steps to track your progress.

1. 1

   Attempt a manual fault reset via the info key on the unit's display.

2. 2

   Power cycle the heat pump system by turning it off at the main breaker for 60 seconds, then restoring power.

3. 3

   Check the system's pressure gauge to ensure adequate water pressure.

4. 4

   Bleed any air from the heat pump's water circuit, if applicable.

5. 5

   If the issue persists, contact a qualified technician to test or replace the flow sensor.