SMA SB 2500TL-21 Installation - Manual (Page 71)

SMA Solar Technology AG Troubleshooting
Installation Manual SB25-30TLST-21-IA-en-13 71
3701 Resid.curr.too.high The inverter has detected residual current and interrupts feed-in
operation.
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
3801 to
3802 DC overcurrent The inverter switches off due to an overcurrent on the DC side.
Corrective measures:
If this event occurs frequently:
• Check the design and the circuitry of the PV array.
Check generator
3901 to
3902 Waiting for DC
start conditions The input power or voltage of the PV modules is not yet sufficient
for feeding into the electricity grid.
Corrective measures:
• Wait until irradiation is higher.
• If this event recurs at medium irradiation levels, check the
PV plant design and the correct circuitry of the PV array.
Start cond. not met
6001 to
6438 Self diagnosis Internal device fault. The inverter interrupts feed-in operation.
Corrective measures:
• Contact the SMA Service Line (see Section 15 "Contact"
(page 92)).
Interference device
6501 to
6502 Self diagnosis The inverter interrupts feed-in operation due to interior
overheating.
Corrective measures:
• Ensure sufficient ventilation.
• Check the heat dissipation (see Section 9.2 "Checking
Heat Dissipation" (page 62)).
Overtemperature
6603 to
6604 Self diagnosis The inverter has detected an internal overload and interrupts
feed-in operation.
Corrective measures:
• Contact the SMA Service Line (see Section 15 "Contact"
(page 92)).
Overload
Event no. Message Cause and corrective measures