User manual HUSQVARNA MASTER PRO S

[. . . ] Inspection and/or maintenance should be carried out with the motor switched off and the plug disconnected. Dust forms when grinding which can cause injuries if inhaled. Dust forms when grinding, which can cause injuries if inhaled. This product is in accordance with applicable EC directives. [. . . ] Remove grinding disc by slightly rotating disc and then pull off (direction that the discs will need to be rotated will depend on the direction the machine was last running). Check to ensure all head locks/shear pins are tight. Once new diamonds have been attached, reverse procedure to lower machine to ground. As new diamonds may be a different height to set being previously used, re-adjust skirt to ensure good seal is established with the floor. Variable speed drives/frequency converters Variable speed drives/ frequency converters Each Husqvarna PG 680 & 820 is equipped with 2 variable speed drive or frequency converter. This unit is incorporated into the machine for the following reasons: 1. Manipulate incoming power to enable increase/ decrease in speed & direction change. Monitors incoming power to ensure suitability for machine and application being performed. Controls current being drawn by motors to ensure motors are running within safe operational limits (to prevent damage to motor). 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. Check current being drawn when machine is running. Reduce speed setting and current draw back into acceptable limits as described on previous page. Try rotating grinding discs and planetary head by hand to see if jam exists Check current being drawn when machine is running. Reduce speed setting and current draw back into acceptable limits as described on previous page. 16 - MOTOR OVERTEMPERATURE Motor being worked too hard and drawing extra current. Further problems that may be experienced when using the grinder and potential solutions are as follows: Problem Not enough diamonds under the machine (if grinding thick glue or soft floors, too few diamonds under the machine will greatly increase the load on grinder and operator). Usually also accompanied by high current draw by large motor. Large motor not working (this can be caused by fault with motor, fault with wiring to motor, or fault with large variable speed drive or frequency converter). Increase number of diamonds under machine to reduce load on grinder and operator. Check there are no faults on larger variable speed drive or frequency converter. Check that large variable speed drive or frequency converter is on. [. . . ] The planetary drive system can be seen as illustrated diagram 1. As the chain ring and planetary drive sprocket are located beneath the cover of the machine, yet on the outside of the machine, there lies the potential that they can be exposed to dust and other debris created during the grinding process. To prevent this as much as possible, a planetary seal has been installed to stop dust and other particles from coming into contact with the planetary drive mechanism. Lubrication of this system will cause dust to build up in chain ring and drastically shorten the life of both the chain ring and planetary drive sprocket. [. . . ]