Hydraulic Indoor Unit LED2 (Green) 3 Flashes, LED1 (Red) 2 Flashes - Serial communication error between controller PCB and interface PCB

What does LED2 3 Flashes, LED1 2 Flashes mean?

This error suggests a problem with the serial communication between the main controller board and the interface board within the indoor unit itself.

• Loose or damaged internal wiring between PCBs.
• Faulty controller PCB.
• Faulty interface PCB.

Click steps to track your progress.

1. 1

   Turn off the main power supply to the heat pump for 30 seconds, then turn it back on.

2. 2

   If the error persists, use the 'Reset HP' function (Line 6711) in the control system.

3. 3

   Contact a qualified service technician for further diagnostics, as this may require internal component inspection.