SMA SMC 9000TL Installation - Manual (Page 61)

Installation Manual SMC9-11TLRP-IA-en-51 61
SMA Solar Technology AG 10 Troubleshooting
CAN Internal communication fault
Corrective measures:
• If this message is displayed frequently, contact the
SMA Service Line.
Check L-N-PE L and N are swapped on the AC connection or PE is not connected.
Corrective measures:
• Ensure that the AC cable is correctly connected (see section
6.3.2 "Connecting the Inverter to the Electricity Grid", page 35).
• If the AC cable is connected correctly and this message is still
displayed, contact the SMA Service Line.
Check Varistor At least one of the varistors is defective.
Corrective measures:
• Check the function of the varistors (see section 10.8).
DC fuse At least one of the string fuses has tripped or is defective.
Corrective measures:
• Check the function of the string fuses (see section 10.10).
Derating The inverter reduces its power output due to overheating.
Corrective measures:
• Clean the fans .
The inverter reduces its power output because the DC input current
exceeds the maximum input current of the inverter.
Corrective measures:
• Ensure that the PV plant is designed correctly.
dI-Bfr
dI-Srr The inverter has detected a change in the differential current.
A change in the differential current can be caused by an earth fault,
residual current or a malfunction. The inverter disconnects from the
electricity grid.
Corrective measures:
• If none of the above causes apply and this message is still
displayed, ensure that the PV plant is insulated correctly and that
there is no earth fault.
dl-Mess Deviation in the differential current measurement
If this message is displayed frequently, permanent shutdown will be
triggered.
Corrective measures:
• Contact the SMA Service Line.
Message Cause and corrective measures