Panasonic VF0 Series Instruction Manual

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Panasonic VF0 Series Instruction Manual Manual pdf 75 page image

74z Fault trip memory ... The cause of the trip is saved in parameters P67 to P70.The details on the latest trip and the three prior trips is saved even if thepower is turned OFF. (The details of the shipment inspection are savedwhen the unit is shipped.)Display Details and cause of faults RemediesSC1 • Instantaneous overcurrentduring acceleration or abnormalheating of heat sink fins• Check for an output short-circuitor ground fault• Check the ambient temperatureand fan operation• Increase the acceleration timeSC2 • Instantaneous overcurrentduring constant speed orabnormal heating of heat sinkfins• Check for output short-circuitand ground fault• Check ambient temperatureand fan operation• Eliminate excessive changes inloadSC3 • Instantaneous overcurrentduring deceleration or abnormalheating of heat sink fins• Check for output short-circuitand ground fault• Check ambient temperatureand fan operation• Increase the deceleration timeOC1 • Overcurrent during acceleration • Check for an open output phase• Increase the acceleration time• Adjust the torque boost levelOC2 • Overcurrent during constantspeed• Check for an open output phase• Eliminate excessive changes inloadOC3 • Overcurrent during deceleration • Check for an open output phase• Increase the deceleration timeOU1 • Excessive internal DC voltageduring acceleration• Increase the acceleration timeOU2 • Excessive internal DC voltageduring constant speed• Eliminate excessive changes inloadOU3 • Excessive internal DC voltageduring deceleration• Increase the deceleration timeLU • Power supply voltage drops toless than 85% of rating• Measure the power supplyvoltage• Consider using theinstantaneous power failurerestart functionOL • An output current exceeding125% of the electronic thermalsetting current or 140% or moreof the inverter rated currentoccurs for more than 1 minute• Check the electronic thermalsetting current• Check and adjust the torqueboost level• Reduce the loadIndividual Details and Remediesfor Fault TripsDownloaded from www.Manualslib.com manuals search engine