16
• Faults with error messages
3110086 EHC20 UK 110515
J.
Error messages
(LED f warning
symbol)
If the automatic controller recognises a malfunction, the warning symbol
will appear in the display. When the error is corrected, then the warning
symbol changes to an information symbol.
Further information about the error may be obtained by pressing the key
under the warning or information symbol.
Do not act on your own accord.
Ask a specialist for advice in the event of problems!
Possible error
messages
Notes for the specialist
Sensor error
Either the sensor, sensor entry on the automatic controller or the connection cable is/was
defective.
Restart
Means that the automatic controller was restarted, e.g., because of a loss of power.
Check the date and time!
Time and date
This display appears automatically after a lengthy loss of power because the time and date
must be checked and, if necessary, reset.
Strong clocking
This is displayed if the pump switches on and off more than 5 times in 5 minutes (that is, in
the event of 11 starts and stops).
No flow
Displayed if the steam turbine is >= 50°C for more than 5 minutes while the pump is on.
Excessive/Insufficient
system pressure
Displayed if Pmin and/or Pmax is less or more than allowed when the pressure monitor is
switched on.
SD card error
Displayed when an SD card is recognised but the automatic controller cannot read it or
write to it.
J.1
Replacing a fuse
Repair and maintenance may only be carried out by a specialist. Disconnect the power supply
before working on the device and secure against reconnection! Make sure the power is off!
Only use the spare fuse included, or a fuse that is constructed in an identical manner and has
the following characteristics: T2 A / 250 V.
Three fuses have been installed in the automatic controller that protect the different relays as well as the controller
electronics. If the automatic controller has no function or display when it is connected to power, or no mechanical or
electronic relays are functioning, then open the device as described under C, below, then remove and check all fuses.
Change the defective fuse, and find and exchange any external defective parts (e.g. pump).
Finally, restart the automatic controller.