2.
Remove the front cover
3.
Remove the cover for the cooling module.
4.
Loosen the venting screw (QM5) with a screwdriver.
Hold a cloth around the screwdriver blade as a small
amount of water may run out.
5.
Insert a screwdriver and turn the pump motor
around.
6.
Screw in the venting screw (QM5).
7.
Start S1255PC and check that the circulation pump
is working.
It is often easier to start the circulation pump with
S1255PC running. If the circulation pump is helped to
start with S1255PC running, be prepared for the
screwdriver to jerk when the pump starts.
The image shows an example of what a circulation pump can look
like.
TEMPERATURE SENSOR DATA
Voltage (VDC)Resistance
(kOhm)
Temperature (°C)
3.256351.0-40
3.240251.6-35
3.218182.5-30
3.189133.8-25
3.15099.22-20
3.10574.32-15
3.04756.20-10
2.97642.89-5
2.88933.020
2.78925.615
2.67320.0210
2.54115.7715
2.39912.5120
2.24510.0025
2.0838.04530
1.9166.51435
1.7525.30640
1.5874.34845
1.4263.58350
1.2782.96855
1.1362.46760
1.0072.06865
0.8911.73970
0.7851.46975
0.6911.24680
0.6071.06185
0.5330.90890
0.4690.77995
0.4140.672100
PULLING OUT THE COOLING MODULE
The cooling module can be pulled out for service and
transport.
1
NOTE
Switch off the heat pump and cut the power
with the safety switch.
Caution
Remove the front cover according to the de-
scription on page 7.
1
The images show examples of what a cooling module could look like.
NIBE S1255PCChapter 10 | Service60
To Next Page
