oPERATIoN MoDES IN CASES oF SENSoR MALFUNCTIoN
outdoor sensor is not connected or has a failure
In such case, the controller operates as a P-controller according to room temperature de-
viation. If room temperature sensor also has a failure or is not connected, the controller will
maintain constant stand-pipe temperature, which is:
- 25 °C higher as the set day or night temperature; for radiator heating system,
- 10 °C higher as the set day or night temperature; for floor heating system.
Stand-pipe sensor is not connected or has a failure
The controller assumes a 120 °C stand-pipe temperature and deactivates room heating.
Heating can be reactivated only by manual operation mode.
Liquid fuel boiler sensor is not connected or has a failure.
The controller assumes a 85 °C boiler temperature and activates the burner, if heating is
required. The boiler temperature can be set manually on a boiler thermostat.
Solid fuel boiler sensor is not connected or has a failure.
The controller assumes a 85 °C solid fuel boiler temperature. Switchover valve turns to
the solid fuel boiler.
Room sensor is not connected or has a failure.
Room heating operates uninterrupted, according to the outdoor temperature.
Return-pipe sensor is not connected or has a failure.
Room heating operates uninterrupted, without influence of return-pipe temperature.
The sensors of d. h. w. storage tank are not connected or have a failure
If one sensor has a failure, the controller uses only the other sensor. If both sensors have a
failure, the controller switches off the pump for d. h. w. warming.
Solar collector sensor is not connected or has a failure.
The circulation pump for d. h. w. warming with solar collectors is deactivated.
TABLE: resistance of Pt1000 temperature sensors
Temp. [°C]
Resistance [Ω]
-20
922
-15
941
-10
961
-5
980
0
1000
5
1020
10
1039
15
1058
20
1078
25
1097
30
1117
Service setting manual
Temp. [°C]
Resistance [Ω]
35
1136
40
1155
45
1175
50
1194
55
1213
60
1232
65
1252
70
1271
75
1290
80
1309
85
1328
Temp. [°C]
Resistance [Ω]
90
1347
95
1366
100
1385
105
1404
110
1423
115
1442
120
1461
125
1480
130
1498
135
1515
140
1536
66
Temp. [°C]
Resistance [Ω]
145
1555
150
1573
155
1592
160
1611
165
1629
170
1648
175
1666
180
1685
185
1703
190
1722
195
1740