Heat Pump Interface Wiring: Mk2 HP Electrical Setup

If the Heat pump is not recognising DHW signal, check connection and verification with multimeter.

Steps

1. Mount DHW flow temperature probe on the outlet pipe.
2. Connect to controller via SENSOR1 and HEATPUMP1.
3. Use multimeter to check:
   • Cold to Common ≈ 3.6kΩ
   • Hot to Common ≈ 1kΩ
4. Simulate 65°C signal for commissioning test.