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OPERATION
6.1 Commissioning the Unit
It is always advisable to check the condition of the drive and its load before starting regular
operation.
Initial Operation
Verify the following:
1. The unit is securely attached to the proper mounting surface
2. The unit’s input terminals are connected to an appropriate power source
3. An appropriately rated motor is connected to the output terminals
4. The motor is secured and properly mounted
PerfectPressure™ Setup
Upon the first initialization of the unit (or after restoring factory defaults of all parameters
using the Two Button Reset Procedure, page 21) the drive will prompt the user to select or
decline a quick setup for constant pressure.
The display will read SETUP CONST PRES YES (ENTER) / NO (HOME).
Press the ENTER key to set up PerfectPressure™ or the HOME key to decline.
Basic parameters for analog constant pressure can be set without navigating through the
complete menu options.
Refer to Section 7.4, PerfectPressure™ Setup – Analog Constant Pressure, for the
information required to complete the setup, and have this information ready to enter when
commissioning the unit.
6.2 Ground Fault Detection
Essential Series drives are equipped with a feature to detect a fault between any of the
output lines and earth. See Table 12, Operating Parameters, GND FAULT DETECT, for
more information on using this parameter. If a ground fault is strong enough to trigger the
parameter GND FAULT DETECT, the drive will not allow the IGBTs to switch. However,
this does not protect the drive from damage in all situations. If a ground fault occurs,
immediately disconnect the input power! Long motor leads and a dV/dT filter can cause
nuisance indications of a ground fault. If a megger does not indicate a ground fault, the
sensitivity of the ground fault detection may need to be reduced by reducing the value of
parameter GND FAULT DETECT.
CAUTION: Before the motor is connected to the output terminals, check all output
lines for line-to-ground faults using a megger. There is a direct path through the drive
circuitry for ground fault currents that can be triggered when power is applied to the input
terminals, even though the output switches are not activated. These currents can cause
serious damage to drive circuitry and are not covered under warranty.
WARNING! The default operating mode when the unit is energized is OFF. If the
parameter ENABLE RESTARTS has been set to allow restarts, the unit will energize in
AUTO mode. If the external controls are calling for a motor run condition, the motor will
start. Make sure either external controls are off before energizing the input, or as soon as
the unit has initialized, push the STOP/OFF key until OFF appears on the display. Refer to
Section 4, Using the Keypad and Display, for instructions on operating the keypad.
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