12 Troubleshooting
SMA Solar Technology AG
Operating Manual
STPx0-3SE-40-BE-en-10
112
Event number
Message, cause and corrective measures
29004
Grid parameter unchanged
Changing the grid parameters is not possible.
29006
Self-test
29253
Input power for backup too low
The input power is too low. The battery-backup operation cannot be started.
As soon as the minimum input power for the battery-backup operation is
reached, the battery-backup operation starts.
Corrective measures:
• Switch off or disconnect backup loads that are not required.
29255
29256
Overload in backup operation
The loads connected to the terminal for backup loads exceed the permissible
current.
Corrective measures:
• Check electric circuits of backup loads and the loads connected.
• Disconnect the loads from the electric circuit.
12.3 Checking the PV System for Ground Faults
If the red LED is glowing and the event number 3501, 3601 or 3701 is being displayed in the
Results
menu on the inverter user interface, there may be a ground fault present. The electrical
insulation from the PV system to ground is defective or insufficient.
DANGER
Danger to life due to electric shock when touching live system components in
case of a ground fault
If a ground fault occurs, parts of the system may still be live. Touching live parts and cables
results in death or lethal injuries due to electric shock.
• Disconnect the product and battery from voltage sources and make sure it cannot be
reconnected before working on the device.
• Only touch the cables of the PV modules on their insulation.
• Do not touch any parts of the substructure or frame of the PV array.
• Do not connect PV strings with ground faults to the inverter.
Summary of Contents for SUNNY TRIPOWER 10.0 SMART ENERGY
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