NORDAC START (SK 135E / SK 175E) – Users Manual for Motor Starters104 BU 0135 en-41186.4 FAQ operational problemsFault Possible cause RemedyDevice will not start (all LEDsoff)• No mains voltage or wrong mainsvoltage• No 24 V DC control voltage• Check connections and supplycables• Check switches / fusesDevice does not react toenabling• Control elements not connected• Right and left enable signals presentsimultaneously• Enable signal present before deviceready for operation (device expecting a0 1 flank)• Restart inhibit is active• Blocking time for reversing is active• Reset enable• Change over P428 ifnecessary: "0" = deviceexpects a 01 flank for enable/ "1" = device reacts to "Level"Danger: Drive can start upindependently!• Check control connections• Check P130• Check DIP switch S1-DIP1Motor will not start in spite ofenable being present• Motor cables not connected• Brake not ventilating• Check connections and supplycablesDevice switches off withouterror message when loadincreases (increasedmechanical load / speed)• Mains phase missing • Check connections and supplycables• Check switches / fusesMotor rotating in wrongdirection• Motor cable: U-V-W interchanged • Motor cable Switch 2 phases• Alternatively:– Swap parameter P420functions right / left enableTable 13: FAQ operational problems
