Siemens SITOP solar User Manual page 25

FI fault
After connection or during operation the permissible fault current on the solar
generator side is exceeded.
Possible causes:
The leakage current of the solar generator to GROUND is too high or the capacity of
the solar generator to GROUND is too high.
Other action:
If the fault is permanent, please contact your installation technician or distributor. The
insulation of the solar generator to PE must be checked.
Insulation fault
Before connection the measured insulation resistance of the solar field to PE is less
than permitted (at least 700 kOhm)
Possible causes:
Mechanical damage of the solar generator or penetration of the solar modules or
connectors by moisture.
Other actions:
Visual inspection of the solar generator and its wiring. If moisture has penetrated, the
fault message disappears again after evaporation. If moisture can be ruled out, the
system must be checked by the installation technician.
Excess temp.!
At temperatures over 100 °Celsius, the device goes off with this message.
Possible cause:
Device is defective. Automatic power control is not working.
Further actions:
Contact your installation technician or your distributor/dealer.
ENS Fault...
Faulty state of the ENS (national mains monitoring) which triggers a general reset,
however, after 5 minutes.
Possible causes:
1) Internal fault (e.g. ENS relay sticking, test current for FI measurement missing)
2) Defective ENS hardware
Other actions:
1) Switch off the device, wait 30 secs. And switch back on.
2) Please contact your installation technician or distributor.
Siemens AG C98130-A7580-A1-1-7619 Page 25 of 34
SITOP solar 08/2006