Husqvarna PG680, PG820 manuel dutilisation Problem Possible Cause Potential Solution, Onto

Faults and trouble shooting

Further problems that may be experienced when using the grinder and potential solutions are as follows:

Problem	Possible Cause	Potential Solution
GRINDER IS HARD TO HOLD	Not enough diamonds under the	Increase number of diamonds under machine to
ONTO	machine (if grinding thick glue or	reduce load on grinder and operator.
	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	Check large motor is plugged in. Check there
	be caused by fault with motor, fault	are no faults on larger variable speed drive or
	with wiring to motor, or fault with	frequency converter. Check that large variable
	large variable speed drive or fre-	speed drive or frequency converter is on. Check
	quency converter).	that large variable speed drive or frequency
		converter is func tioning properly (unplug both mo-
		tors, set display on keypad to Output Frequency,
		switch machine to RUN, see if numbers on screen
		change from zero and begin counting up. If num-
		bers 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
	Drive belt is slipping.	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.
	Drive belt is broken (this can be	Replace internal drive belt.
	confirmed by turning one of the
	grinding heads by hand. If all grind-
	ing heads rotate together, belt is not
	broken. If only one grinding head
	turns, belt is broken).
GRINDER SOUNDS LIKE IT IS	Small planetary drive motor not	Check small planetary drive motor is plugged in.
OVERREVVING	plugged in.
	Small motor not working (this can	Check small motor is plugged in. Check there are
	be caused by fault with motor, fault	no faults on small variable speed drive or fre-
	with wiring to the motor, or fault	quency converter. Check that small variable speed
	with large variable speed drive or	drive and frequency converter is on. Check that
	frequency converter).	small variable speed drive or frequency converter
		is functioning 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 num-
		bers stay on zero, small variable speed drive or
		frequency converter is not receiving run command
		from witch on control panel. Machine needs to be
		checked by an electrician or Husqvarna Construc-
		tion Products.
GRINDER IS JUMPING AROUND	Grinding heads may be worn-out or	Check grinding heads for broken parts or excess
	damaged.	movement.
	Diamonds may not be fitted cor-	Check to ensure all diamonds are fitted correctly
	rectly or different height diamonds	and are the same height.
	may be on the grinding heads.
	Head locks may be loose or miss-	Check to ensure all head locks are present and
	ing.	tight.

English - 17