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The solar pump operates, despite the fact that the switch-on condition is not
fulfilled:
Secondary symptoms
The pump symbol in
the display rotates.
•
Symbol rotates.
•
Display has a red
background.
•
Tool symbol is visible
on the display.
Solar pump is operating, activation condition is fulfilled, nevertheless, no heat
transport in the solar circuit (no "fluid circulation"):
Secondary symptoms
The pump symbol in
the display rotates.
Solar pump shows cycle behaviour.
Secondary symptoms
11.2
Pt1000 temperature sensor values
A potentially defective sensor can be checked using an ohmmeter. To do this, the sensor must be dis-
connected, its resistance measured, and the value compared with the figures in the table below. Small
deviations are acceptable.
Temperature [°C]
-30
Resistance [Ω]
88
Temperature [°C]
80
Resistance [Ω]
1309
9
Possible cause
•
The interval function is acti-
vated.
•
The holiday function is acti-
vated.
•
The frost protection function is
activated.
•
Blockage protection is acti-
vated.
The operating switch is set to
manual operation and the pump
output is set to „on".
Possible cause
•
Air is in the solar circuit.
•
The isolating valve is closed.
•
Limescale/contamination on
solar circuit
Possible cause
•
Temperature difference too
small
•
Collector sensor incorrectly
positioned
-0
-10
0
9
961
1000 1039
90
100
110
1347
1385
143
EN
Procedure
•
No fault
•
Deactivate the relevant function, if
necessary.
•
Set the operating switch to auto-
matic operation.
Procedure
Check the solar circuit for air.
Check the isolating valve.
Flush/clean the solar circuit.
Procedure
Adjust temperature difference in the
Parameters menu.
Check the collector sensor.
10
0
30
1078
1117
10
130
140
1461
1498
1536
730.137 | 08.37
40
50
60
1155
1194 13
150
160
170
1573
1611 1648
70
171
180
1685
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