2–26

Using the Front Panel Keypad

Monitoring Parameters with the Display

After using the keypad for parameter editing, it’s a good idea to switch the inverter from Program Mode to Monitor Mode and close the panel door (puts the keys for parameter editing out of sight). This will also turn out the PRG LED, and the Hertz or Ampere LED indicates the display units.

 

HITACHI

POWER

 

 

PRGRUN

5 0.0

HzA

RUN

STOP

 

RESET

 

 

 

 

MIN

MAX

Inverter Mounting

and Installation

 

 

For the powerup test, monitor the motor speed indirectly by viewing the inverter’s output frequency. The output frequency must not be confused with base frequency (50/60 Hz) of the motor, or the carrier frequency (switching frequency of the inverter, in the kHz range). The monitoring functions are in the “D” list, located near the top left of the “Keypad Navigational Map” on page 2–23.

Output frequency (speed) monitor - Resuming the keypad programming from the previous table, follow the steps in the table below.

 

 

Action

Display

Func./Parameter

 

 

 

 

 

 

 

 

 

 

 

 

Press the FUNC. key.

A

- -

“A” Group selected

 

 

 

 

 

 

 

Press the

1

key three times.

d

0 1

Output frequency selected

 

 

 

 

 

 

 

 

 

 

 

 

Press the FUNC. key.

 

0.0

Output frequency displayed

 

 

 

 

 

 

 

 

When the d 0 1 function code appeared, the PRG LED went OFF. This confirms the inverter is no longer in programming mode, even while you are selecting the particular monitoring parameter. After pressing the Function key, the display shows the current speed (is zero at this point).

Running the Motor

If you have programmed all the parameters up to this point, you’re ready to run the motor! First, review this checklist:

1.Verify the Power LED is ON. If not, check the power connections.

2.Verify the Run Key Enable LED is ON. If not, review the programming steps to find the problem.

3.Verify the PRG LED is OFF. If it is ON, review the instructions above.

4.Make sure the motor is disconnected from any mechanical load.

5.Turn the potentiometer to the MIN position (completely counterclockwise).

6.Now, press the RUN key on the keypad. The RUN LED will turn ON.

7.Slowly increase the potentiometer setting in clockwise fashion. The motor should start turning when the indicator is in the 9:00 position and beyond.

8.Press the STOP key to stop the motor rotation.