This may indicate a "sulfated" battery that is no longer accepting a charge, or a blown fuse/tripped circuit breaker in the charger.
It clearly identifies the charging times for different battery capacities (e.g., estimating that a 60Ah battery may take several hours depending on the amperage used). bradex bx60 battery charger manual
If you tell me more about your specific situation, I can provide better help: This may indicate a "sulfated" battery that is