123Normal Operating MessagesInverter statusDiagnostic ParametersDisplay SignificancenoP No Operation, terminal X2.1 (Drive Enable) is not setLS Low speed, inverter is enabled but no direction ofrotation is set, motor current still offFacc Forward accelerationFcon Forward constant runningFdEc Forward decelerationrAcc Reverse accelerationrCon Reverse constant runningrdEc Reverse decelerationboff Indicates brake should be in the process of releasingat beginning of runbon Indicates brake should be setting at end of runElectronicmotor overloadBase block timeDisplay Description Cause and SolutionElectronic Motor Overload protectionwas activated.This message indicates that serialc o m m u n i c a t i o n b e t w e e n t h ekeypad operator and the drive orthe drive and the elevator controlhas been lost. See parameterUS.2 to bypass this fault.This message precedes most faultsand also occurs if the drive enable isturned off while the car is running.This indicates the power stage is notready for operation.• Excessive motor current above thevalue adjusted in LF. for IM or LF. andLF.12 for PM motors.• Look for mechanical loading problemsor motor data adjustment in parametersLF.10...LF.1.• If communication is restored this faultwill clear after 4 seconds. If not removethe operator, cycle power to the drive,verify the red pilot LED on the controlboard of the drive turns on and stay on,(not flashing), and then install operatoragain.• When using serial communication withthe elevator controller, make sure theserial cable to the controller is pluggedinto X6C on the operator. Also refer toparameter LF.2 part “e” for more info onclearing E.BUS faults in this case.• Indicates the output transistors havebeen safely shut off and are beingblocked from further operation.• Typically the result of a hardware failure.Replace the drive.Bus com. faultNo Power Unit
