SMA SUNNY BOY 3.8-US User Manual page 36

8 Troubleshooting
Event number
3601
3701
3801
3901 to 3902
42 SB30-77-1SP-US-40-BA-en-11
Message, cause and corrective measures
High discharge curr. > Check generator
The leakage current of the inverter and the PV array is too high. There is a
ground fault, a residual current or a malfunction.
The inverter interrupts feed-in operation immediately after exceeding a thresh-
old. When the fault is eliminated, the inverter automatically reconnects to the
utility grid.
Corrective measures:
• Check the PV system for ground faults (see Section 8.4, page 59).
Resid.curr.too.high > Check generator
The inverter has detected a residual current due to temporary grounding of the
PV array.
Corrective measures:
• Check the PV system for ground faults (see Section 8.4, page 59).
DC overcurrent > Check generator
Overcurrent at the DC input. The inverter briefly interrupts feed-in operation.
Corrective measures:
• If this message is displayed frequently, ensure that the PV array has been
correctly rated and wired.
Waiting for DC start conditions > Start cond. not met
The feed-in conditions for the utility grid are not yet fulfilled.
Corrective measures:
• Ensure that the PV array is not covered by snow or otherwise shaded.
• Wait for higher irradiation.
• If this message is displayed frequently in the morning, increase the
voltage limit for starting grid feed-in. Change the parameter Critical
voltage to start feed-in.
• If this message is displayed frequently with medium irradiation, ensure
that the PV array is correctly rated.
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User Manual