Hitachi SJ300-037HFE 사용자 설명서

SJ300 Inverter

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roub

leshooting

and Maintenance

The capacitor bank consists of an assembly that slides out of the SJ300 unit. This means that no 
soldering is required!

1. First, make sure that all power is removed 

from the unit, and that  you have waited 5 
minutes before accessing the wiring area. Then 
you’ll need to remove the metal wire entry 
plate located at the bottom of the unit. This 
may require you to disconnect all wires to the 
power terminals. Then, just loosen the screws 
as shown, and slide the wire entry plate 
outward on its guides to remove.

WARNING: The screws that retain the capacitor bank assembly are part of the electrical 
circuit of the high-voltage internal DC bus. Be sure that all power has been disconnected from 
the inverter, and that you have waited at least 5 minutes before accessing the terminals or 
screws. Be sure the charge lamp is extinguished. Otherwise, there is the danger of electrocution 
to personnel.

2. The capacitor bank assembly is locked into 

the inverter via two screws that also make the 
electrical connection to the internal DC bus. 
These two screws are accessible just below 
the power terminals as shown to the right.

3. Grasp the capacitor bank assembly and gently 

slide it out of the unit as shown to the right. DO 
NOT try to force the removal; it will slide out 
easily if all the screws in the steps above have 
been removed.

4. Then slide in the new unit and replace all the 

screws removed in steps 1) and 2).

CAUTION: Do not operate the inverter unless 
you have replaced the two screws that connect 
the capacitor bank assembly to the internal DC 
bus. Otherwise, damage to the inverter may 
occur.

Retention screws for wire entry plate

Retention screws for capacitor bank

Pull capacitor bank assembly outward 

from SJ300 unit to remove