Error 32 (3 Green, 2 Red Flashes) — Serial communication error between Controller /Interface PCBs

What does 32 mean?

The hydraulic unit's green LED flashes three times and the red LED flashes twice. This indicates a communication problem between the controller PCB and the interface PCB inside the unit.

• Loose or incorrect connections between the Main PCB and the Interface PCB.
• External interference from other electrical equipment generating harmonic waves.
• A fault with either the Main PCB or the Interface PCB.

Click steps to track your progress.

1. 1

   Stop the heat pump system by disconnecting power, wait at least one minute, then restart the system.

2. 2

   Check the physical connections between the Main PCB and the Interface PCB inside the unit, ensuring they are secure.

3. 3

   Identify and disconnect any nearby equipment (like neon light bulbs) that might be generating harmonic waves and interfering with communication.

4. 4

   If an abnormal connection is found, correct it according to the installation manual.

5. 5

   If the error persists after checking connections and external causes, consult a qualified technician as a PCB replacement may be necessary.