Справочник Пользователя для Mitsubishi Electronics FR-A500

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The transistorized inverter is a static unit mainly consisting of semiconductor devices. Daily inspection must

be performed to prevent any fault from occurring due to adverse influence by the operating environment,

such as temperature, humidity, dust, dirt and vibration, changes in the parts with time, service life, and other

factors.

For some short time after the power is switched off, a high voltage remains in the smoothing capacitor. When

accessing the inverter for inspection, switch power off. When more than 10 minutes have elapsed, make

sure that the voltage across the main circuit terminals P-N of the inverter is 30VDC or less using a tester, etc.

• Check the following:

1)Motor operation fault

2)Improper installation environment

3)Cooling system fault

4)Unusual vibration and noise

5)Unusual overheating and discoloration

• During operation, check the inverter input voltages using a tester.

Always run the inverter in a clean state.

When cleaning the inverter, gently wipe dirty areas with a soft cloth immersed in neutral detergent or ethanol.

Check the areas inaccessible during operation and requiring periodic inspection. For periodic inspection,

consult us.

1) Cooling system fault :

Clean the air filter, etc.

2) Tightening check and retightening :

The screws and bolts may become loose due to vibration,

temperature changes, etc. Check and tighten them. Tighten

them according to the specified tightening torque.

3) Check the conductors and insulating materials for corrosion and damage.

4) Measure insulation resistance.

5) Check and change the cooling fan and relay.

Note: Do not use solvent, such as acetone, benzene, toluene and alcohol, as they will cause the inverter

surface paint to peel off.

Do not use detergent or alcohol to clean the display and other sections of the operation panel (FR-

DU04) or parameter unit (FR-PU04) as these sections may deform.