Fault Messages - Siemens SITOP solar User Manual

6.2 Fault Messages

Below are the primary fault messages displayed by the device when a malfunction
occurs.
When the maximum input voltage of the device is exceeded, the inverter is not
connected. If the input voltage exceeds this value during operation, the device is
turned off.
Possible causes: Generator is dimensioned incorrectly.
Other actions:
• Immediately disconnect the U-DC cable from the device!!
• Measure voltage on the input terminals.
If the permissible tolerances of the mains frequency are exceeded, the fault message
appears and the device switches off.
Possible causes:
1) The device has detected a mains frequency outside the permissible tolerance.
Possible causes are mains fluctuations. It is advisable to wait a little while. The
device should go back on mains supply after a few minutes.
2) If the fault message occurs very frequently or permanently, the mains quality may
be poor or the device may be defective.
Other actions:
1) No action
2) Please contact your installation technician or distributor. The mains frequency
must be checked.
This fault message appears if the mains impedance increases abruptly by at least 1
ohm.
The device should go back on mains supply after a few minutes.
Possible causes:
1) The device has detected an impedance jump outside the permissible tolerance.
Possible causes are mains fluctuations. It is advisable to wait a little while. The
device should go back on mains supply after a few minutes.
2) Defective mains connection (loose contact).
3) If the fault message occurs very frequently or permanently, the mains quality may
be poor or the device may be defective.
Other actions:
1) No action
2) The incoming power line (e.g. AC mains terminals) must be checked.
3) Please contact your installation technician or distributor. The mains impedance
must be checked.
Siemens AG C98130-A7580-A1-1-7619
SITOP solar 08/2006
U-DC too high!
Fault mains freq.
Impedance leap
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