Nibe F1245 Service Manual

Troubleshooting guide
Alarm 1, 25 – sensor fault
Is the actual sensor correctly
connected?
YES
YES
YES
Are the characteristics for the
sensor OK, measured from any
external joint in the sensor cable?
(See "Data for temperature
sensor" section.)
Is any external joint in the sensor
cable correctly connected?
Defective sensor. Replace.
NO
NO
Action.
Are the characteristics for the
sensor OK, measured from
connected sensor cable on the
input card (AA3)?JSH (See "Data
for temperature sensor" section.)
Action.
NO
Check wiring and switches.
NO
Is the output voltage from the card
correct? (See "Data for
temperature sensor" section.)
Defective input circuit board
(AA3). Replace.
YES
Check wiring and switches.
NO
YES
37Chapter 6 | TroubleshootingF1245

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