8 6. MAINTENANCE AND INSPECTION
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The inverter is a piece of static equipment consisting mainly of semiconduct-
or elements.
To prevemt trouble with the inverter, due to high temperature, humidity, dust,
intense vibration, component deterioration, etc., it is very important to perform
periodic inspection.
6.1 Caution for maintenance and inspection
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(1) Operator must check whether, power supply is ON or OFF by himself
to prevent misoperation by others.
(2) After the power
is switched ’ off, the capacitor remains charged at high
voltage for a while.
Before making an pnspection, check that the CHARGE lamp on the P.C.
board is off, and voltage across the inverter main circuit terminals P
and N is below DC30V, using a multimeter, etc.
6.2 Inspection points
This invertey is equipped with the power pilot lamp and error (alarm)
display function. .
It is advisable that you familiarize yourself with the error display definitions.
Also note the normal settings of the electronic thermal relay, acceleration/
deceleration time, etc.
(1) Daily inspection
During daily operation, check the following:
(a) The motor operates properly.
(b) The environment is normal.
(cl The cooling system is normal.
(d) There is no unusual vibration and noise.
(e) There is no overheat and discoloration in any component of the
inverter .
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