Hydraulic Indoor Unit LED2 (Green) 4 Flashes, LED1 (Red) 1 Flash - Heat pump capacity signal error (Open or short)

What does LED2 4 Flashes, LED1 1 Flash mean?

This indicates an issue with the heat pump's capacity signal, which could be an open circuit (no signal) or a short circuit (incorrect signal).

• Damaged or faulty wiring related to the capacity signal.
• Sensor or component responsible for capacity signaling is malfunctioning.
• Loose connection in the signal circuit.

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

   Inspect visible wiring for any damage or loose connections.

3. 3

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

4. 4

   Contact a qualified service technician for system inspection and repair.