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Husqvarna PG680 Operator's Manual Page 13

Husqvarna grinder operator's manual.
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Variable speed drives/frequency converters
Menus and information they provide
The following menu items/screens on the variable
speed drive/frequency converters provide the following
useful information to the operator.
OUTPUT FREQUENCY (Monitor Menu)
This screen tells the operator the frequency the motor
is running at when the machine is in operation. The
value for output frequency should be constant when
the machine is running. If there is a fl uctuation in
output frequency when the machine is running, gener-
ally this indicates the motor is running at or near the
limit of its programmed current limit. The current limits
(predetermined and set by Husqvarna Constructions
Products) are as follows:
1. Large motor (which information is found on the large
variable speed drive/frequency converter) - 25
amps.
2. Small motor (which information is found on the small
variable speed drive/frequency converter) - 5 amps.
If there is a fl uctuation in output frequency when the
machine is in operation, it is advisable to check the
motor current as well. This can be found by pressing
the UP arrow on the keypad 3 times. For trouble free
operation concerning current issues, it is best to keep
output current at or around 21 amps (for the large mo-
tor). The current draw of the motor can be reduced by
reducing the speed of the motor using the speed dial
on the control panel near the handle bars.
Generally speaking, most over-current problems will
be associated with the large motor (and therefore,
monitored on the large variable speed drive/frequency
converter). Keep the current draw on the small motor
under 3.5amps for consistent operation.
MOTOR CURRENT (Monitor Menu)
This screen displays the current draw of the corre-
sponding motor (i.e. large variable speed drive/fre-
quency converter monitors function of large motor,
small variable speed drive/frequency converter moni-
tors function of small motor) when the motor is running.
See comments already covered under OUTPUT FRE-
QUENCY relating to motor current.
DC LINK VOLTAGE (Monitor Menu)
This screen displays the quality of the power supply to
the machine. It will read higher values when the ma-
chine in standby and lower values when the machine
is in operation.
FAULT HISTORY
The fault history menu stores the last series of faults
experienced by the variable speed drive/frequency
converter. If there is a recurring fault pattern experi-
enced by the machine, the information can be obtained
from the fault history menu. For more on faults, see
trouble shooting faults
15
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Troubleshooting

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