English
34
Troubleshooting
In general, all of the settings in the menus PAR and MEN and the terminals should be checked if
there is an error.
Malfunction, but “realistic” temperatures:
Check the program number.
Check the thresholds for on/off and the set differential temperatures. Have the thermostat and
differential thresholds been reached?
Were the settings in the submenus (MEN) changed?
Can the output be switched on/off in manual mode? - If endurance runs and standstill at the
output produce an appropriate reaction, the unit is definitely not broken.
Are all of the sensors connected to the right terminals? - Heat the sensor using a lighter and
check the display.
Incorrect temperature displayed:
If a value such as -999 is displayed when a sensor short-circuits or 999 if there is an interruption,
the cause may not be a material or terminal error. Are the correct sensor types (KTY or PT1000)
selected under the menu MEN/ SENSOR? The factory settings have all inputs set to PT (1000).
The sensor can also be checked without a measuring device simply by changing the part that is
probably defective with one that works at the strip terminal and checking the display. The
resistance measured with an ohmmeter should have the following value according to the
temperature:
Temp. [°C] 0 10 20 25 30 40 50 60 70 80 90 100
R (Pt1000) [Ω] 1000 1039 1078 1097 1117 1155 1194 1232 1271 1309 1347 1385
R (KTY) [Ω] 1630 1772 1922 2000 2080 2245 2417 2597 2785 2980 3182 3392
The settings of the parameters and menu functions ex works can be restored at any time
using the down key (entry) when plugging the unit in. If this occurs, WELOAD will appear in
the display for three seconds.
If the unit does not run when it has power, the quick-blow fuse 3.15A that protects the
control system and the output should be checked and exchanged if necessary.
As the programs are constantly being revised and improved, there may be a difference in the
numbering of the sensors, pumps, and programs. Only the instruction manual provided with the
device delivered applies (identical serial number). The program version of the manual must
correspond to the one for the device.
If the control system malfunctions despite these checks as described above, please contact your
retailer or the manufacturer directly. The cause of the error can only be determined if the table of
settings has been completely filled in along with a description of the error. If possible, also include
a hydraulic diagram of the system.
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