Hitachi SJ300-037HFE 사용자 설명서

SJ300 Inverter

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Step 9: After wiring the inverter and motor, you’re ready to do a powerup test. The procedure 
that follows is designed for the first-time use of the drive. Please verify the following conditions 
before conducting the powerup test:

• You have followed all the steps in this chapter up to this step.

• The inverter is new, and is securely mounted to a non-flammable vertical surface

• The inverter is connected to a power source and motor.

• No additional wiring of inverter connectors or terminals has been done.

• The power supply is reliable, and the motor is a known working unit, and the motor 

nameplate ratings match the inverter ratings.

• The motor is securely mounted, and is not connected to any load.

If there are any exceptions to the above conditions at this step, please take a moment to take any 
measures necessary to reach this basic starting point. The specific goals of this powerup test 
are:

1. Verify that the wiring to the power supply and motor is correct.
2. Demonstrate that the inverter and motor are generally compatible.
3. Give a brief introduction to the use of the built-in operator keypad.

The powerup test gives you an important starting point to ensure a safe and successful applica-
tion of the Hitachi inverter. We highly recommend performing this test before proceeding to the 
other chapters in this manual.

The following instructions apply to the powerup test, or to any time the inverter is powered and 
operating. Please study the following instructions and messages before proceeding with the 
powerup test.

1. The power supply must have fusing suitable for the load. Check the fuse size chart 

presented in Step 5, if necessary.

2. Be sure you have access to a disconnect switch for the drive input power if necessary. 

However, do not turn OFF power to the inverter during its operation unless it is an 
emergency.

3. Turn the inverter’s front panel potentiometer (if it exists) to the MIN position (fully counter-

clockwise).

CAUTION: The heat sink fins will have a high temperature. Be careful not to touch them. 
Otherwise, there is the danger of getting burned.

CAUTION: The operation of the inverter can be easily changed from low speed to high speed. 
Be sure to check the capability and limitations of the motor and machine before operating the 
inverter. Otherwise, there is the danger of injury.