... phase current unbalance,under-voltahe etc.2,Error display:With phase A,phaseB,phaseCworking power indicating( ... phases failed,the indicating lamp off), overload display(when the mo tor working current exceed the ... shoud be same with the control circuit power supply of the motor.4,Don’e dismount and replace ... dot comTHANK YOU FOR YOUR VISITING! NEW DESIGN!! WHZD-25A smart motor protector(CCC&CE&ISO9001)