Husqvarna PG 530 Operator's Manual page 15

Further problems that may be experienced when using the grinder and potential solutions are as follows:
Problem
GRINDER IS HARD TO HOLD
ONTO
GRINDER SOUNDS LIKE IT IS
OVER REVVING
GRINDER IS JUMPING AROUND
16
- English
Faults and trouble shooting
Possible Cause
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.
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).
Drive belt is slipping.
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).
Small planetary drive motor not 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).
Grinding heads may be worn-out or
damaged.
Diamonds may not be fi tted correctly or
different height diamonds may be on the
grinding heads.
Head locks may be loose or missing.
Potential Solution
Increase number of diamonds under machine
to reduce load on grinder and operator.
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.
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.
Replace internal drive belt.
Check small planetary drive motor is plugged
in.
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.
Check grinding heads for broken parts or
excess movement.
Check to ensure all diamonds are fi tted cor-
rectly and are the same height.
Check to ensure all head locks are present
and tight.