Menus and information they provide, Fault History

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 ﬂuctuation 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 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 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

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