Hitachi L300P Series Service Manual page 35

(How to remove cooling fan for steel case)
•
Remove terminal cover
‚
Reconfirm that the charge lamp is turned OFF.
ƒ
Remove the all screws of the cooling fan case and pull out like following figure.
„
Remove the connector for fan connection.
(How to fix cooling fan for steel case)
•
Pay attention to the direction of the cooling fan.
‚
Connect the fan connector to J21
ƒ
Fix the cooling fan case
„
Fix the front cover and terminal cover.
(2) DC bus capacitor
Big capacitance of electrolytic capacitors are used in a DC bus line of the inverter as a smoothing circuit.
Due to the chemical reaction inside the capacitor, its lifetime highly depends on the ambient temperature
and usage condition. Replacement is recommended to be done in 5 years under normal usage condition.
Also, it should be anyway replaced with new ones when there is any abnormality is found or its capacity
becomes less than 85% of its rated capacitance.
(How to remove DC bus capacitor for mold case)
•
Remove terminal cover.
‚
Reconfirm that the charge lamp is turned OFF.
ƒ
Remove blind cover.
„
Remove all the screws connecting capacitor PCB and power PCB.
...
Pull the capacitor PCB downwards.
and front cover.
or J22 or J23 or J24 (depends on the model) on the power PCB.
to the inverter main body.
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