Faults And Trouble Shooting - Husqvarna PG 530 (ph 1) Manuel D'utilisation

Faults and trouble shooting

The following table outlines some of the problems that may be experienced when using the PG grinders and a list of
potential solutions.
Problem Possible Cause
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).
GRINDER IS
HARD TO HOLD
ON TO
Drive belt is slipping.
Drive belt is broken (this can be
confirmed 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).
Only 1 phase is coming into the
machine, machine will not fault and
will draw <1 amp motor current, fan
will be turning slowly.
The application or the use of the
machine requires too much of the
machine capacity
Small planetary drive motor not
plugged in.
Small motor not working (this can
be caused by fault with motor, fault
GRINDER
with wiring to the motor, or fault with
SOUNDS LIKE
small variable speed drive or
IT IS
frequency converter).
OVERREVVING
The large motor is not working. This
can be caused by fault with motor,
fault with wiring to motor, or fault
with large variable speed drive.
Diamonds may not be fitted
correctly or different height
diamonds may be on the grining
heads. Diamond tools may be
GRINDER IS
mixed.
LEAVING AN
Head locks may be loose or
IRREGULAR
missing.
SCRATCH
PATTERN
Resin tools may be mixed or have
picked up a contaminant.
Grinding heads may be worn-out or
damaged.
26 – English
MAINTENANCE
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 variable speed drive or
frequency converter is on. 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.
Replace internal drive belt.
Check incoming power supply.
In some applications even when the right number and type of diamonds have
been selected, it can still be necessary to slow down both the motors speeds and
the forward speed of the machine across the floor.
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 variable 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 witch on control
panel. Machine needs to be checked by an electrician or Husqvarna
Construction Products.
Check that there are no faults on either the small or the large variable speed
drives. Reset if required at the control panel on the handle bar.
Check that all diamonds are fitted correctly and are the same height. Check that
all segments are the same grit and bond. In the event of uneven diamond
segments space out uneven diamonds evenly and run machine on an abrasive
surface till all segments are equal heights.
Check that all head locks are present and tight.
Ensure that all resins are the same grit and bond and free from contaminants. To
clean resins briefly run them on a lightly abrasive surface.
Check grinding heads for broken parts or excess movement.