Faults And Trouble Shooting - Husqvarna PG 530 Bedienungsanweisung

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. Check small planetary drive motor is plugged in.
Small motor not working (this can be
caused by fault with motor, fault with wiring
GRINDER
to the motor, or fault with small variable
SOUNDS LIKE
speed drive or frequency converter).
IT IS
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 missing.
IRREGULAR
SCRATCH
Resin tools may be mixed or have picked
PATTERN
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 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 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 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.