Manual - Famco

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Chapter 8 - Troubleshooting & Maintenance8.4 How to Check Power ComponentsBefore checking the power components, be sure to disconnect AC Input supply and wait until the Main ElectrolyticCapacitors (DCP-DCN) discharge.ContactorP1P2Charge resistorB1GGGRSTElectrolyticcapacitors+GB2EEEUVWEGGGNEEENDynamic Braking Unit (Option) for 15~30HP models• Diode Module CheckCheck pointResistance to be GoodR, S, T – P1 50 k ohms or moreR, S, T – N 50 k ohms or more• Charge Resistor CheckCheck pointContactor terminalsResistance to be GoodDepending on model• DB (Dynamic Braking) IGBT (Option)Check pointResistance to be GoodB2 - N50 k ohms or moreG - NA few kilo ohms• IGBT Module CheckCheck pointB2 - NG - NResistance to be Good50 k ohms or moreA few kilo ohms186
Chapter 8 - Troubleshooting & Maintenance8.5 MaintenanceThe iS5 series is an industrial electronic product with advanced semiconductor elements. However, temperature,humidity, vibration and aging parts may still affect it. To avoid this, it is recommended to perform routine inspections.8.5.1 Precautions• Be sure to remove the drive power input while performing maintenance.• Be sure to perform maintenance only after checking that the bus has discharged. The bus capacitors in theelectronic circuit can still be charged even after the power is turned off.• The correct output voltage can only be measured by using a rectifier voltage meter. Other voltage meters,including digital voltage meters, are likely to display incorrect values caused by the high frequency PWM outputvoltage of the drive.8.5.2 Routine InspectionBe sure to check the following before operation:• The conditions of the installation location• The conditions of the drive cooling• Abnormal vibration• Abnormal heating8.5.3 Periodical Inspection• Are there any loose bolt, nut or rust caused by surrounding conditions? If so, tighten them up or replace them.• Are there any deposits inside the drive-cooling fan? If so, remove using air.• Are there any deposits on the drive’s PCB (Printed Circuit Boards)? If so, remove using air.• Are there any abnormalities in the various connectors of the drive’s PCB? If so, check the condition of the connectorin question.• Check the rotating condition of the cooling fan, the size and condition of the capacitors and the connections with themagnetic contactor. Replace them if there are any abnormalities.8.5.4 Internal Fuse ReplacementWhen the internal fuse is opened the IGBT’s should be checked thoroughly before replacing the fuse.Contact the factory for replacement fuse information.187
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Manual - Famco

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