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Event F921

Event message:

F921 Cell Max Voltage

Explanation:

Battery cell overvoltage fault.

Corrective measures:

Contact the Service.

Additionally Required Materials and Equipment

Transporting the battery

Electrical Connection

Wiring Overview with One Battery Inverter
Wiring Overview with Two Battery Inverters
Connecting the Battery via a DC Distributor
Requirements for the electrical connection
Electrical Connection Procedure
Connecting the Inverter
Connecting the Battery
Connecting the DC Distributor
- Connection Area of the DC Distributor
- Connecting the DC Distributor

Commissioning

Inverter as System Manager: Commissioning Procedure
Inverter as Subordinate Device: Commissioning Procedure
Checking the Mounting and Connection Work
Switching the Inverter On
Commissioning the Battery
Configuring the Temperature and Humidity Sensor

Operation

Safety Functions
Control Elements
Activating the Battery Management System Display
Connecting to the Inverter User Interface
Design of the User Interface
Access rights to the user interface
Energy management
Configuring the battery
Digital input
Firmware Update
- Procedure for Updating the Firmware
- Carry out a manual firmware update
Backup file
Resetting the product to default setting
Deleting the Admin Account
Stopping the inverter
Starting the inverter
Restarting the Battery

Disconnecting from voltage sources

Disconnecting the Inverter from Voltage Sources
Disconnecting the Battery from Voltage Sources

Cleaning and Maintenance

Safety Information for Cleaning and Maintenance
Maintenance Interval
Cleaning and Maintenance Materials
Torques
Cleaning and Maintenance Procedure
Checking Electrical Connections
Performing a Visual Inspection of the Battery
Cleaning and Maintaining the Battery Cabinet
Cleaning and Maintaining the Battery Management System
Cleaning and Maintaining the Battery Modules
Documenting the System Status
Cleaning the fans of the inverter
Checking the fans of the inverter

Troubleshooting

Displaying Event Messages
Inverter Event Messages
Battery Event Messages
Battery end of life
Replacing the Surge Arrester
Cleaning the fans of the inverter
Fan Behavior of Battery Modules
- Fan Control based on the Battery Module Operating Temperature
- Fan Control based on the Battery Module State of Charge
Deep Discharge Protection Limits

Decommissioning

Disconnect the terminals on the inverter
Disconnecting the Connections on the Battery
Disassembling the Inverter
Disassembling the Battery

Replace the inverter with a replacement device

Extension of the Battery

Safety when Extending the Battery
Requirements for Output Voltage and State of Charge
Installing an Additional Battery Module
Installing an Additional Battery Cabinet

Storage

Specifications for Battery Storage
Climatic Requirements for the Storage Location
Permitted storage positions of battery modules
Preparing the Battery Cabinet for Storage
Storing the Battery
Requesting Recyclization of a Battery
Procedure in case of fire

Disposal

Disposing of the Inverter
Critical and non-critical battery modules
Providers for the disposal of batteries
Specifications for Battery Disposal
Reporting damaged battery
Disposing of the Battery

Event F921

Information on this Document

Safety

Scope of Delivery

Additionally Required Materials and Equipment

Product overview

Transporting the battery

Mounting and Preparing the Connection

Electrical Connection

Commissioning

Operation

Disconnecting from voltage sources

Cleaning and Maintenance

Troubleshooting

Decommissioning

Replace the inverter with a replacement device

Extension of the Battery

Storage

Disposal

Technical Data

Accessories

EU Declaration of Conformity

UK Declaration of Conformity

Contact