Nibe F1245 Service Manual

Function check, circulation pumps
With forced control of the heating medium pump (GP1)
or the brine pump (GP2) it can be necessary to check the
supply (230 V AC) and the control signal (0-10 V DC) to
the circulation pump.
Brine pump (GP2) Grundfos
LED PWM2 on
Board AA2
PVM2, X2:3-4Pump speed GP2
Not litapprox 0 V DC100 %
Half litapprox 5 V DC50 %
Litapprox 10 V DC0 %
Heating medium pump (GP1) Grundfos
LED PWM1 on
Board AA2
PVM1, X2:1-2Pump speed GP1
Not litapprox 0 V DC100 %
Half litapprox 5 V DC50 %
Litapprox 10 V DC0 %
Test of reversing valve cooling (only F1245PC)
1.
Select manual mode, cooling in menu 4.2. (Untick
the addition and heating)
2.
Reduce the time between cooling and heating to 0
in menu 1.9.5.
3.
Check that the flow temperature in menu 3.1, tab 2
falls during cooling operation after approx 1 minute,
the mixing valve is open in cooling mode.
4.
Cooling medium temperature out in menu 3.1, tab
1 must rise during cooling operation.
5.
If points 3 and 4 correspond, remove the mixing
valve motor to see if the spindle is as illustrated be-
low.
6.
Select manual mode, cooling in menu 4.2, untick
cooling and tick addition and heating.
7.
Check that the flow temperature in menu 3.1, tab 2
rises during heating operation after a few minutes.
Cooling medium temperature in menu 3.1, tab 1
must not rise during heating operation. The mixing
valve is open to heating mode.
MONTERA VENTILEN
I DETTA LÄGE
MONTERA MOTORN
I DETTA LÄGE
SKRUVEN DRAS MED 0,8Nm
Install the motor in this
position. Tighten the screw to
0.8 Nm
Install the valve in this
position.
F1245Chapter 6 | Troubleshooting50

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