Hitachi SJ300-037HFE 사용자 설명서

SJ300 Inverter

In

v

e

rt

er Mounting

and In

stallati

on

After using the keypad for parameter 
editing, it’s a good idea to switch the 
inverter from Program Mode to Monitor 
Mode. This will turn out the PRG LED, and 
the Hertz, Volt, Ampere, or % LED 
indicates the display units.

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 diagram in the 

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

When the 

d

 01

 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 param-
eter. After pressing the 

 key, the display shows the current speed (is zero at this point).

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.

Press the 

 key.

“H” Group selected

Press the 

 key.

Output frequency selected

Press the 

 key.

Output frequency displayed

Hz

POWER

A

RUN

PRG

RUN

STOP

MIN

MAX

FUNC

1

2

%

ALARM

STR

V

kW

5 0.0

h – – –

1

d

0 0 1

0.00

FUNC