Mitsubishi Electronics FR-A500L instruction manual Motor current is large, Speed does not increase

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PROTECTIVE FUNCTIONS

(5) Motor current is large.

·Check that the load is not too heavy.

·Check that the torque boost (Pr. 0, Pr. 46, Pr. 112) setting is not too large.

(6) Speed does not increase.

·Check that the maximum frequency (Pr. 1) setting is correct.

·Check that the load is not too heavy. (In agitators, etc., load may become heavy in winter.)

·Check that the torque boost (Pr. 0, Pr. 46, Pr. 112) setting is not too large to activate the stall prevention function.

(7) Speed varies during operation.

During operation under advanced magnetic flux vector control, the output frequency varies with load fluctuation between 0 and 2Hz. This is a normal operation and is not a fault.

1)Inspection of load

·Check that the load is not varying.

2)Inspection of input signal

·Check that the frequency setting signal is not varying.

·Check that the frequency setting signal is not affected by induced noise.

3)Others

·Check that the settings of the applied motor capacity (Pr. 80) and the number of applied motor poles (Pr.

81)are correct for the inverter and motor capacities in advanced magnetic flux vector control.

·Check that the wiring length is within 30m in advanced magnetic flux vector control.

·Check that the wiring length is correct in V/F control.

(8) Operation mode is not changed properly.

If the operation mode is not changed properly, check the following:

1. External input signal ･･････ Check that the STF or STR signal is off.

When it is on, the operation mode cannot be changed.

2. Parameter setting ････････ Check the Pr. 79 setting.

When the setting of Pr. 79 "operation mode selection" is "0" (factory setting), switching input power on places the inverter in the external operation mode. Press the operation panel's [MODE] key three times and press the [UP] key (press the [PU] key for the parameter unit (FR-PU04)). This changes the external operation mode into the PU operation mode. For any other setting (1 to 8), the operation mode is limited according to the setting.

(9) Operation panel (FR-DU04) display is not provided.

·Make sure that the operation panel is connected securely with the inverter.

(10)POWER lamp is not lit.

·Make sure that the wiring and installation are correct.

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Contents FR-A560L-375K~900K-NA This section is specifically about safety matters Injury Prevention Electric Shock PreventionFire Prevention Transportation and installation WiringAdditional instructions Trial runMaintenance, inspection and parts replacement OperationEmergency stop Disposing of the inverterContents Chapter Outline Precautions for operation InstallationWiring Pre-Operation InformationName Description Basic ConfigurationBasic configuration Chapter Installation Instructions for installationAt 5cm 1.97 inch Wiring Terminal connection diagramSymbol Terminal Name Description Description of main circuit terminalsDescription of control circuit terminals Terminal Name DescriptionType Symbol Terminal Name Description Wiring of the main circuit Wiring instructionsTerminal block layout P1, P, N Connection procedure Wiring of the control circuit NA version（OR Version）Changing the control logic RUN DC24V How to use terminals STOP, CS and PC Connection to the PU connector For RS-485 communicationDesign information Chapter Operation Chapter Parameters Parameter List Parameters17, 18 R a M E T E R S 173 200 278 Protective Functions Errors Alarms Error alarm definitionsOHT Operatio Panel Unit Name Description Display FR-PU04 FR-DU04Main circuit error E,15 details Name DetailsTo know the operating status at the occurrence of alarm Correspondences between digital and actual charactersAlarm code output Resetting the inverterOperation Panel Output Terminal Signal On-Off Display Alarm Code Alarm Output across B-C （FR-DU04 ）Operation Check Point Remedy Panel Display TroubleshootingChecking the operation panel display at alarm stop Operation Panel Check Point Remedy Display Faults and check points Speed greatly differs from the settingMotor remains stopped Motor rotates in opposite directionOperation mode is not changed properly Power lamp is not litMotor current is large Speed does not increasePrecautions for Maintenance and Inspection Precautions for maintenance and inspectionCheck items Periodic inspectionInsulation resistance test using megger Dielectric strength testDaily and Periodic Inspection Module device numbers and terminals to be checked PreparationChecking method Replacement of parts Part Name Standard Replacement Description IntervalCooling fan Smoothing capacitorsMeasurement of main circuit voltages, currents and power Measurement of voltages and currentsMeasuring Points and Instruments Chapter Specifications Standard specification Model specificationsCommon specifications Temperature applicable for a short period in transit, etc FR-A560L-450K, 375K Outline drawingsFR-A560L-530K～900K Specifications Appendices Appendix AppendixWiring between cooling fan and terminals is as follows Check the air flow directionAppendix Shipment case example Mitsubishi Electric Corporation
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