User manual HUSQVARNA MASTER PRO S

[. . . ] Inspection and/or maintenance should be carried out with the motor switched off and the plug disconnected. WARNING Under no circumstances may the machine be started without observing the safety instructions. Should the user fail to comply with these, Husqvarna Construction Products Sweden AB or its representatives are free from all liability both directly and indirectly. Read through these operating instructions and make sure that you understand the contents before starting to use the machine. [. . . ] Once both a speed and direction have been nominated, switch on dust extraction or vacuum device. It is highly recommended to use the Husqvarna DC 5500 dust extraction system for complete dust control. Standing behind machine with handlebars set as described earlier, apply a small amount of downward pressure on the handle. Switch the machine to run mode using the STOP/RUN switch on the control panel. The machine should start smoothly and accelerate to the selected speed over a period of 5 seconds As different applications require different selections of diamond tools, there will be many occasions when the grinding discs need to be changed. Ensure STOP/RUN switch is in STOP position as unintentional starting of machine while changing discs can result in serious injury. Have a set of gloves ready, as diamonds can get very hot during dry grinding applications. 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). 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. 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). 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 func tioning properly (unplug both motors, set display on keypad to Output Frequency, switch machine to RUN, see if numbers on screen change from zero and begin counting up. If numbers stay on zero, large variable speed drive or frequency converter is not receiving run command from switch on control panel. Machine needs to be checked by an electrician or by Husqvarna Construction Products Remove belt tensioner cover plate on bottom of machine and check there is no water or dust on the inside of the machine that may be causing the belt to slip on the drive pulleys. [. . . ] Routine checks for broken "fingers" in the spring steel grinding heads are recommended. Life expectancy for grinding heads can vary between 6 and 12 months depending on the amount of usage. Replacement spring steel springs are available and can be replaced without throwing the grinding head away. The spring steel heads can also be made less flexible by the addition of a second spring steel spring. [. . . ]