Panasonic Minas-LIQI Series Technical Reference

Contents

№SR-ZSV00039 － 59 －Motor Business Unit, Appliances Company, Panasonic Corporation7－2 Details of Protective FunctionsProtectivefunctionMain SubName Cause Action11 0Control powersupplyundervoltageprotectionThe PN voltage at the converter of the control power hasreduced to the specified value or less.① The supply voltage is too low. An instantaneouspower failure has occurred.② The power supply capacity is too small: the supplyvoltage has reduced due to rush current when the mainpower was turned on.③ The servo drive has failed (circuit failure).Measure the line voltage of L1C-L2C at the connector andterminal block.① Increase the supply voltage capacity. Change the powersupply.② Increase the power supply capacity.③ Replace with a new servo drive.12 0 Over-voltageprotectionThe supply voltage has exceeded the allowable input voltagerange. → The PN voltage at the converter has increased tothe specified value or more. The supply voltage is toohigh. A sudden voltage increase due to a phase advancecapacitor and/or UPS (uninterruptible power supply system).① The regenerative resistor has disconnected wires.② The external regenerative resistor is inappropriate, notabsorbing regenerative energy.③ The servo drive has failed (circuit failure).Measure the line voltage of the connectors (L1, L2, and L3).Enter the correct voltage. Remove the phase advancecapacitors.① By using a tester, measure the resistance of the resistorexternally attached between the terminals B1-B2 of the servodrive. If ∞, there is disconnected wiring.② Change the regenerative resistance and wattage to thespecified values.③ Replace with a new servo drive.13 0Main powersupplyundervoltageprotection(between P to N)When Pr5.08 “LV trip selection at main power OFF” is setto 1, instantaneous power failure between L1 and L3occurred for a longer time than specified in Pr5.09“Detection time of main power off”, or the P-N voltage ofthe main power converter decreased below the defined valueat servo-on.① The supply voltage is too low. An instantaneouspower failure has occurred.② An instantaneous power failure has occurred.③ The power supply capacity is too small: the supplyvoltage has reduced due to rush current when the mainpower was turned on.④ Open phase: The servo drive specified with a 3-phaseinput was operated with a single phase power supply.⑤ The servo drive has failed (circuit failure).Measure the line voltage of connectors (L1, L2, and L3).① Increase the supply voltage capacity. Change the powersupply. Remove the cause for the electromagneticcontactor to have failed, and turn on the power again.② Check the setting of Pr5.09 “Detection time of main poweroff”.Provide the correct setting for each phase of the powersupply.③ Increase the power supply capacity. Refer to “List ofperipheral devices applicable to the servo drive” for thecapacity of the power supply.④ Make the correct connection for each phase of the powersupply (L1, L2, and L3). Use L1 and L3 for single phase100 V and single phase 200 V.⑤ Replace with a new servo drive.0 Over-currentprotection141 IPM errorprotectionCurrent flowing in the converter has exceeded the specifiedvalue.① The servo drive has failed (such as component failure incircuit and IGBT)② Short circuit of the motor wires U, V, and W③ Ground fault of the motor wires④ Burnout of the motor⑤ Contact failure of the motor wires⑥ The dynamic brake relay has adhered because the servocontrol has been turned on and off frequently.⑦ The motor is not suitable for the servo drive.⑧ Timing of the pulse input is either the same as or earlierthan that of the servo turning on.① Turn on the servo control with the motor wiresdisconnected. If the failure occurs immediately, replacethe servo drive with a new (operating) one.② Check for whiskers of the connector lead wires to makesure the motor wire connections U, V, and W are not shortcircuited. Make the correct connection of the motor wires.③ Check the insulation resistance between the motor wires U,V, and W and the motor ground wires. If the insulation isinsufficient, replace the motor.④ Check the resistance between the motor wires for balance.If the balance is poor, replace the motor.⑤ Check for any lost connector pin at the motor connectionsU, V, and W. Fix any loose or lost pins properly.⑥ Change the servo drive. Stop starting and stopping theoperation by turning the servo control on and off.⑦ Check the name plates of the motor and servo drive for theirpart numbers (for the capacity). Replace the motor to fitthe servo drive.⑧ Wait for 100 ms at the minimum after the servo control isturned on before entering any pulse.(Continued)