Husqvarna PG530 Manuale Utente

16 

- English

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

GRINDER IS HARD TO HOLD 
ONTO

Not enough diamonds under the machine 
(if grinding thick glue or soft fl oors, 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.

Increase number of diamonds under machine 
to reduce load on grinder and operator.

Large motor not working (this can be 
caused by fault with motor, fault with wir-
ing to motor, or fault with large variable 
speed drive or frequency converter).

Check large motor is plugged in. Check there 
are no faults on larger variable speed drive or 
frequency converter. Check that large vari-
able speed drive or frequency converter is 
on. Check that large 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 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.

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 caus-
ing the belt to slip on the drive pulleys.

Drive belt is broken (this can be con-
fi rmed by turning one of the grinding 
heads by hand. If all grinding heads rotate 
together, belt is not broken. If only one 
grinding head turns, belt is broken).

Replace internal drive belt.

GRINDER SOUNDS LIKE IT IS 
OVER REVVING

Small planetary drive motor not plugged 
in.

Check small planetary drive motor is plugged 
in.

Small motor not working (this can be 
caused by fault with motor, fault with 
wiring to the motor, or fault with large vari-
able speed drive or frequency converter).

Check small motor is plugged in. Check there 
are no faults on small variable speed drive or 
frequency converter. Check that small vari-
able speed drive and frequency converter is 
on. Check that 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 numbers stay on 
zero, small 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 Husqvarna Con-
struction Products.

GRINDER IS JUMPING AROUND

Grinding heads may be worn-out or 

damaged. 

Check grinding heads for broken parts or 
excess movement.

Diamonds may not be fi tted correctly or 
different height diamonds may be on the 
grinding heads.

Check to ensure all diamonds are fi tted cor-
rectly and are the same height.

Head locks may be loose or missing.

Check to ensure all head locks are present 
and tight.