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Husqvarna PG 680 Operator's Manual Page 21

Floor grinder/polisher.
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Monitor screen
OUTPUT FREQUENCY
REF. FREQUENCY
MOTOR SPEED
MOTOR CURRENT
MOTOR TORQUE
MOTOR POWER
MOTOR VOLTAGE
DC LINK VOLTAGE
The menu tree illustrated on this page outlines the
important menu options that provide useful information for
monitoring and diagnostic purposes when using the
machine.
As can be seen on the menu tree to the right, when the
machine is turned on, the variable speed drives or
frequency converters are set to display the Output
Frequency to the motor (a zero value will register when
the machine is in stand-by mode).
The Output Frequency page also falls under the Monitor
Menu.
It can be seen from the left hand column, the two primary
menus important to the operator are the Monitor Menu
and Fault History menu.
Navigation through the menu tree is achieved by using the
up, down, left and right keys on the keypad (see previous
page).
Parameter Menu
Keypad
Control Menu
Active Faults Menu
Faults History Menu
System Menu
Expanded Boards
Menu
Monitor Menu
OPERATING
Information provided
Frequency motor is running
at when machine is running.
Frequency speed control
dial is set to.
Speed of motor when
machine is running.
Current draw of motor when
machine is running.
Percentage of motor torque
when machine is running.
Percentage of motor power
when machine is running.
Percentage of motor voltage
when machine is running.
Indicates quality of power
supply.
DC Link Voltage
Motor Voltage
Motor Power
Motor Torque
Motor Current
Motor Speed
Output Frequency
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 fluctuation in output frequency when
the machine is running, generally 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:
Large motor (which information is found on the large
variable speed drive/frequency converter) - 25 amps.
Small motor (which information is found on the small
variable speed drive/frequency converter) - 5 amps.
If there is a fluctuation 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 motor). 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, 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 3.5 amps for
consistent operation.
MOTOR CURRENT (Monitor Menu)
This screen displays the current draw of the
corresponding motor (i.e. large variable speed drive/
frequency converter monitors function of large motor,
small variable speed drive/frequency converter monitors
function of small motor) when the motor is running.
See comments already covered under OUTPUT
FREQUENCY 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 machine 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 experienced
by the machine, the information can be obtained from the
fault history menu. For more on faults, see trouble
shooting faults.
English
21

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