Nibe F1245 Service Manual

Alarm 2 – sensor fault
Is the actual sensor correctly
connected?
YES
YES
YES
Is the sensor correctly connected
on the base board (AA2)?
Are the characteristics for the
sensor OK? (See "Data for
temperature sensor" section.)
Action.
NO
NO
Defective sensor. Replace.
Are the characteristics for the
sensor OK, measured from wiring
connector on the base board
(AA2)?
(See section “Electrical wiring
diagram in IHB”.)
Action.
NO
Check wiring and switches.
NO
Is the output voltage from the card
correct? (See "Data for
temperature sensor" section.)
Defective base card (AA2).
Replace.
YES
Check wiring and switches.
NO
YES
F1245Chapter 6 | Troubleshooting38

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