Hitachi SJ300-037HFE 사용자 설명서

Maintenance and Inspection

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leshooting

and Maintenance

The SJ300 Series inverters have field-replaceable fan units. They include an internal connector 
for easy removal and replacement. You will need to remove the front panel covers to remove 
the fan assembly. First, be sure to  remove power from the unit and wait at least 5 minutes 
before accessing the wiring area.

1. Remove the digital operator from the front 

panel. Then remove the bottom front panel 
to expose the wiring area as shown.  This 
will also expose the retention screws for the 
top front panel. Remove these screws, 
which will allow the front panel to hinge 
upward and unfasten from the unit.

2. After removing all front panel pieces, locate 

the thumb latches in the top of the inverter 
housing. Grasp and push the releases inward as 
shown to the right, and gently pull upward to 
remove the fan assembly.

CAUTION: Remove the fan assembly carefully, 
since it is attached to the unit via connecting 
wires.

3. After unfastening the fan assembly, turn it over 

to expose the connecting wires. Then locate the 
PWB connector as shown. Disconnect the 
wiring.

4. Connect the new fan assembly wiring. The 

polarized plug will ensure a proper connection.

5. Snap the replacement fan into place.
6. Replace all front panel pieces and retention 

screws.

Digital operator keypad removal

Upper panel 

retention screws

PWB connector for fan assembly wiring