15
VMIFB202
Alarm sensor
Action:
Measure the resistance of the sensor, check the ohm value against the temperature according to the table below.. If the actual tempera-
ture and the temperature displayed do not correspond, calibrate or replace the sensor.
When measuring the resistance of the sensor the sensor must be released before measuring!
If a fault in the outdoor sensor is suspected, check that the cable between the heat pump and outdoor sensor is not damaged in
anyway by nails, pins or another cable securing device. This is a commonly occurring fault.
If the sensor does not give a correct value, the sensor is defective.
Troubleshooting Guide
Alarm sensor
temperatur
ohm
-30
1884
-25
1443
-20
1115
-15
868
-10
681
-5
538
0
428
5
343
10
276
15
224
20
183
25
150
30
124
35
103
40
86
temperatur
kohm
0
66.3
5
52.4
10
41.8
15
33.5
20
27.1
25
22
30
18
35
14.8
40
12.2
45
10.1
50
8.5
55
7.1
60
6
65
5
70
4.2
75
3.7
80
3.1
85
2.7
150 ohm sensor
Outdoor / Defrost sensor
22 kohm sensor
Supply line, return line, hot water,
brine in, brine out, discharge pipe sensor
