User manual HUSQVARNA PG 820

[. . . ] Please read the operator's manual carefully and make sure you understand the instructions before using the machine. Key to symbols 4 Safety Instructions 6 Introduction 7 Transport 7 Storage 7 What is what 8 Setting up/Operation 10 Changing the diamonds 12 Variable speed drives/ frequency converters 13 Faults and trouble shooting 16 Diamonds 18 Diamond selection 19 Maintenance 23 Maintenance schedule 27 Technical data 28 The symbols below are used on the machine and in this Operator's Manual. It is important that the user understands the significance of these in order to work with the machine safely. Please read the operator's manual carefully and make sure you understand the instructions before using the machine. [. . . ] OUTPUT FREQUENCY (Monitor Menu) This screen tells the operator the frequency the motor is running at when the machine is in operation. The value for output frequency should be constant when the machine is running. If there is a fluctuation in output frequency when the machine is running, generally this indicates the motor is running at or near the limit of its programmed current limit. the current limits (predetermined and set by Husqvarna Constructions Products) are as follows: 1. Large motor (which information is found on the large variable speed drive/frequency converter) - 25 amps. Small motor (which information is found on the small variable speed drive/frequency converter) - 5 amps. If there is a fluctuation in output frequency when the machine is in operation, it is advisable to check the motor current as well. For trouble free operation concerning current issues, it is best to keep output current at or around 21 amps (for the large motor). The current draw of the motor can be reduced by reducing the speed of the motor using the speed dial on the control panel near the handle bars. Generally speaking, most over-current problems will be associated with the large motor (and therefore, monitored on the large variable speed drive/frequency converter). Large variable speed drive/frequency converter monitors function of large motor, small variable speed drive/frequency converter monitors function of small motor) when the motor is running. It will read higher values when the machine in standby and lower values when the machine is in operation. FAULT HISTORY The fault history menu stores the last series of faults experienced by the variable speed drive/frequency converter. If there is a recurring fault pattern experienced by the machine, the information can be obtained from the fault history menu. For more on faults, see trouble shooting faults Faults and trouble shooting Faults and trouble shooting When either one of the variable speed drives or frequency converters in the machine experience a fault and "trip" out, they will cease to run and an error message will appear flashing on the keypad display (see picture below). The following list are the most commonly experienced faults and possible action steps. Reduce speed setting and current draw back into acceptable limits as described on previous page. Short circuit on output side of variable speed drives or frequency converters. Power supply to variable speed drives or frequency converters has been turned off. 11--OUTPUT PHASE SUPERVISION Short circuit on output side of variable speed drives or frequency converters. Motor failure (very rare) 14--UNIT OVER TEMPERATURE Variable speed drives or frequency converter over temperature due to high temperature working environment or faulty temperature sensor. Reduce speed setting and current draw back into acceptable limits as described on previous page. [. . . ] Grinding Heads Drive System The grinder comes equipped with Dual Drive TechnologyTM. As the grinding discs are driven by the large motor via an internal belt, and because the belt is sealed inside the machine, there is no maintenance regarding this drive system until a major service (belt and bearing replacement) is due. Planetary Drive System The second component to the Dual Drive TechnologyTM system is the planetary head drive system which is powered by the secondary or small motor and gearbox arrangement. This system is on the outside of the machine and will require routine maintenance. [. . . ]