Nibe F1245 Service Manual

Alarm 50 – high pressure alarm
Is the heating medium flow correct?
YES
YES
YES
Does the pressure switch break at the
correct pressure?
Is the pressure switch correctly
connected on terminal -QA40-X4?
Action.
NO
NO
Action.
Are the supply temperature sensor
(BT2 ) and return line sensor (BT3 )
showing the correct readings?
- Check the particle filter.
- Check the heating medium pump.
- Open any radiator / underfloor heating-
thermostats.
- Check that the climate system is bled.
NO
Action.NO
Check cooling circuit.
YES
F1245Chapter 6 | Troubleshooting42

Nibe F1245 Specifications

General

Refrigerant	R410A
Control System	NIBE SMO 40
Dimensions (HxWxD)	1800 x 600 x 620 mm
Energy Efficiency Class Heating 35°C	A++
Energy Efficiency Class Heating 55°C	A++
Heating Capacity	5-12 kW
COP Heating	4.5
Integrated Hot Water Tank	180 liters
Power Input Heating	1.0 - 3.0 kW