Hitachi NEXT Series Instruction Manual page 105

Oil-free rotary screw air compressor
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Inspection of Controller and Fan Inverter
(The fan inverters are provided only with
Charge lamp (controller)
(Check that it is off.)
Charge lamp (fan inverter)
(Check that it is off.)
9. MAINTENANCE [How to Service the Air Compressor]
①   T urn off the power and wait approximately 10
minutes. Next, remove the front door and then
remove the cover of control panel
②   C heck that the charge lights of the controller and fan
inverter are off. Check for abnormal overheat,
discoloration, abnormal odor, and contamination.
③   B low off the dust by dry air
④   D uring periodical maintenance, re-tighten the
terminals, check the conductor and insulator for
corrosion, and inspect/replace the cooling fan and
smoothing capacitor.
Contact the local HITACHI distributor/master dealer or
representative office for the detail.

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