Panasonic M2X Series Instruction Manual

Panasonic M2X Series Instruction Manual Manual pdf 33 page image

- -33Protective FunctionProtective functionsYour inverter is equipped with the following protective function that:① displays warning message, or② avoids trip without displaying warning message.③ displays warning message and turns off inverter output, or④ trips the inverter (the trip signal will be removed upon power off)Type Display on5-digit LED Protective function Corrective action①Electronicthermal tripMonitor(Flashes)Monitor display flashes when theoutput current reaches theelectronic thermal trip level andthe timer operates.Check for overloading and reducethe load as necessary.Overcurrent stallprevention(Not displayed)If the output current exceeds [Current limit operating point] duringacceleration or constant-speedoperation, the output frequency isreduced for trip prevention.(The operation level can beadjusted with [ Current limitoperating point].)Increase the acceleration time, orreduce the inertial load.②Overvoltagestall prevention(Not displayed)If the converter’s DC voltageexceeds approx. 775 V duringdeceleration, the deceleration timeis prolonged for trip prevention.(The deceleration time can beadjusted with [ Decelerationfactor at stall].)Prolong the deceleration time, orreduce the inertial load.UndervoltageInstantaneouspower failureprotectionWhen the converter’s DC voltagefalls below approx. 360 V, it isjudged as “instantaneous powerfailure”, and the inverter’s output isturned off.∗1 When the converter’sDC voltage falls below approx.300 V, the control circuit is reset.If the voltage is restored by thetime the control circuit is reset, theoperation can be continued.∗2Check the power source, cabling,wiring, etc.③CW rotationprevention∗3When the CW rotation preventionfunction is selected, CW rotation isprevented when the CW signal isissued.Check if the CW command is notissued.∗1 The inverter can continue normal operation with approx. 15 ms power interruption.∗2 Enabled when [ Restart prevention upon power recovery] is set to .∗3 This function is enabled only when [ CW rotation prevention] is set to .