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9
Troubleshooting
This chapter describes the fault displays and countermeasure for the
VS-626MC5 and motor problems and countermeasures.
9.1
Protective and Diagnostic Functions
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9.1.1 Fault Detection
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9.1.2 Minor Fault Detection
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9.1.3 Operation Errors
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9.2
Troubleshooting
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9.2.1 If Constant Constants Cannot Be Set
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9.2.2 If the Motor Does Not Operate
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9.2.3 If the Direction of the Motor Rotation is Reversed
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9.2.4 If the Motor Does Not Put Out Torque or If Acceleration
is Slow
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9.2.5 If the Motor Does Not Operate According to Reference9
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9.2.6 If the Slip Compensation Function Has Low Speed
Precision
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9.2.7 If There is Low Speed Control Accuracy at High-speed
Rotation in Open-loop Vector Control Mode
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9.2.8 If Motor Deceleration is Slow
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9.2.9 If the Motor Overheats
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9.2.10 If There is Noise When the Inverter is Started or From
an AM Radio
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9.2.11 If the Ground Fault Interrupter Operates When the
Inverter is Run
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9.2.12 If There is Mechanical Oscillation
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9.2.13 If the Motor Rotates Even When Inverter Output is
Stopped
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9.2.14 If 0 V is Detected When the Fan is Started, or Fan
Stalls
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9.2.15 If Output Frequency Does Not Rise to Frequency
Reference
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9.2.16 Winding change error has occurred
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