PA7300 Instruction Manual - TECO-Westinghouse Motor Company

3. FAULT DISPLAY AND TROUBLESHOOTINGThe 7300PA has protection function and warning self-diagnosis function. If a fault a occurs, theprotection functions operate to shut off the inverter output and the motor coasts to a stop, at the sametime, the fault contact signal (terminal R3A-R3C, R3B-R3C) is output.A). PROTECTION FUNCTION AND TROUBLESHOOTINGProtection functionLowvoltageprotectionMain circuitlow voltageMomentarypower lossprotectionControl circuitlow voltageMan circuitsoft chargecontactordefectiveExplanationWhen the inverter power voltage drops, torque becomes insufficient andmotor is overheated.Inverter output is stopped when the main circuit DC voltage becomes lowerthan the low voltage detection level for 15 ms or longer. or about 2 secondsor longer if the momentary power loss redo-thru function is used.Detection level: Approximately 210V or less for 200V classand 420V or less for 400V classThe inverter output is shut-off when he control circuit voltage drops belowthe low voltage level.The inverter output is shut-off when no answer back is received from themain circuit soft-start contactor.LCD display(English)Fault (UV1)* 1DC Volt. LowFault (UV2)* 1C/B DC Volt. LowFault (UV3)* 1MC Ans. FaultOvercurrent protectionThe inverter output is shut-off when the inverter output current becomesapprox. 200% and above of inverter rated current.Fault (OC)* 1Over CurrentGround-fault protectionOvervoltage protectionCooling fin overheatOverloadprotectionExternalfaultsignalinputControlCircuitFaultThe inverter output is shut-off when a ground-fault occurs at the inverteroutput side and the ground-fault current exceeds approximately 50% of theinverter rated current.The inverter output is shut-off when the main circuit DC voltage becomesexcessive because or regeneration energy caused by motor decelerationand negative load.Detection. Approx. 800V for input voltage set 400V and aboveLevel : Approx. 700V for input voltage set 400V or less and approx.400V for 200V classThe inverter output is shut-off when the ambient temperature rises and theheat sink fin reaches 90. Please check for a detective cooling fan orclogged filter.Fault (GF)* 1Ground ShortFault (OV)* 1Over VoltageFault (OH)* 1Over HeatInverter output is stopped when motor overload is detected by the electronicthermal overload in the inverter. Either a inverter duty constant-torqueFault (OL1)* 1Motor specialized motor or general-purpose motor can 9 selected. If more thanMotor Over Loadone motor is driven. overload protection should be disabled. Use a thermalrelay or thermal protector for each motor.The inverter output is shut-off when the electronic thermal overload reachesFault (OL2)* 1Inverter or exceeds the inverse time limit of 103% of the inverter's rated currentInverter Over Loadoccurs. Maximum rated overload: 110%. 1 min.The motor operates according to a preset mode when the inverter outputOver torqueFault (OL3)* 1current execeeds the overtorque detection level. This function is used todetectionOver Torqueprotect the machine or to monitor the output torque.Fault (EF3)* 1Terminal 3External Fault 3Fault (EF5)* 1Terminal 5External Fault 5When an external alarm signal is input. the inverter operates according to aFault (EF6)* 1Terminal 6 preset stop method (coasting to a stop, continuous operation. or ramp toExternal Fault 6stop)Fault (EF7)* 1Terminal 7Terminal 8ControlCircuit FaultEEPROMfaultEEPROMBCC CODEErrorCPU ADCFaultOption CardFaultThe inverter output is shut-off when a transmission error occurs in thecontrol circuit or a component fails. The inverter output is also shut-off whena specialized option such as the digital operator is not properly connected.External Fault 7Fault (EF8)* 1External Fault 8Fault (CPF02)* 1Logic board FaultFault (CPF03)* 1EEPROM FaultFault (CPF04)* 1EEPROM CODE Err.Fault (CPF05)* 1A/D FaultFault (CPF06)* 1Opt. Card A/D Fault111