11 Troubleshooting
SMA Solar Technology AG
74
STP5-9TL-IA-en-10
Installation Manual
3501
Insulation resist.
Check generator
The inverter has detected an earth fault in the PV array.
Corrective measures:
• Check the PV plant for earth faults
(see Section 11.5).
3601
High discharge curr.
Check generator
The leakage current from the inverter and the PV array
is too high. This can be caused by an earth fault, a
residual current or a malfunction.
The inverter interrupts feed-in operation immediately
after exceeding a limiting value and then automatically
reconnects to the electricity grid.
Corrective measures:
• Check the PV plant for earth faults
(see Section 11.5).
3701
Resid.curr.too.high
Check generator
The inverter has detected a residual current through
brief PV array earthing.
Corrective measures:
• Check the PV plant for earth faults
(see Section 11.5).
3801 …
3802
DC overcurrent
Check generator
Overcurrent at the DC input. The inverter briefly
interrupts feed-in.
Corrective measures:
• If this message is displayed frequently, ensure
that the PV array has been correctly rated and
wired.
3901 …
3902
Waiting for DC start
conditions
Start cond. not met
The requirements for the feed-in to the electricity grid
have not been met.
Corrective measures:
• Wait for more irradiation.
• If this message is displayed frequently in the
morning, increase the limiting voltage to start the
feed-in. To do this, change the parameter
Minimum voltage input
.
• If this message is displayed frequently with
medium irradiation, ensure that the PV array is
correctly rated.
Event
number
Display message
Cause and corrective measures
