SMA SB 2500TL-21 Installation - Manual (Page 70)

Troubleshooting SMA Solar Technology AG
70 SB25-30TLST-21-IA-en-13 Installation Manual
3401 to
3402 DC overvoltage The DC input voltage connected to the inverter is too high.
The inverter interrupts feed-in operation.
Corrective measures:
• Immediately disconnect the inverter from the
PV array (see Section 8.2 "Disconnecting the
Inverter from Voltage Sources" (page 57)).
Otherwise, the inverter could be destroyed.
• Check that the DC voltage of the strings is in compliance
with the input voltage range of the inverter before
reconnecting the inverter to the PV array.
• If the voltage is within the permissible input voltage range,
the inverter may be defective. Contact the
SMA Service Line.
Disconnect
generator
3501 Insulation resist. The inverter has detected an earth fault in the PV array and does
not connect to the electricity grid for safety reasons. Damaged
insulation can cause electric shock.
Corrective measures:
• Check strings for earth faults (see Section 11.5 "Checking
the PV Array for Earth Faults" (page 76)).
• The installer of the PV array must remedy any earth faults
before the affected string is reconnected.
Check generator
3601 High discharge
curr. The leakage current from the inverter and the PV array is too
high.
This can be caused by a sudden earth fault, a residual current or
a device malfunction.
The inverter interrupts feed-in operation immediately after
exceeding the specified threshold and then automatically
reconnects to the electricity grid once the fault has been
remedied.
Corrective measures:
• Check strings for earth faults (see Section 11.5 "Checking
the PV Array for Earth Faults" (page 76)).
• The installer of the PV array must remedy the earth faults
before you re-connect the affected string.
Check generator
Event no. Message Cause and corrective measures