6.10 Troubleshooting without Fault DisplayYASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual 337Troubleshooting6◆ Motor Does Not Rotate Properly after Pressing RUN Button or after EnteringExternal Run Command■ Motor Does Not Rotate■ Motor Rotates in the Opposite Direction from the Run CommandCause Possible SolutionsThe drive is not in the Drive Mode. • Check if the DRV light on the digital operator is lit.• Enter the Drive Mode to begin operating the motor. Refer to The Drive and Programming Modes on page 91.The button was pushed.Stop the drive and check if the correct frequency reference source is selected. If the operator keypad shall be the source, the LO/RE buttonLED must be on. If the source is REMOTE, it must be off.Take the following steps to solve the problem:• Push the button.• If o2-01 is set to 0, then the LO/RE button will be disabled.Auto-Tuning has just completed.• When Auto-Tuning completes, the drive is switched back to the Programming Mode. The Run command will not be accepted unless thedrive is in the Drive Mode.• Use the digital operator to enter the Drive Mode. Refer to The Drive and Programming Modes on page 91.A Fast Stop was executed and has not yetbeen reset. Reset the Fast Stop command.Settings are incorrect for the source thatprovides the Run command.Check parameter b1-02 (Run Command Selection).Set b1-02 so that it corresponds with the correct Run command source.0: Digital operator1: Control circuit terminal (default setting)2: MEMOBUS/Modbus communications3: Option cardThere is faulty wiring in the control circuitterminals.• Check the wiring for the control terminal.• Correct wiring mistakes.• Check the input terminal status monitor (U1-10).The drive has been set to accept thefrequency reference from the incorrectsource.Check parameter b1-01 (Frequency Reference Selection 1).Set b1-01 to the correct source of the frequency reference.0: Digital operator1: Control circuit terminal (default setting)2: MEMOBUS/Modbus communications3: Option card4: Pulse train input (RP)The terminal set to accept the main speedreference is set to the incorrect voltage and/or current.If the frequency reference is set at terminal A1, check parameter H3-01 for the correct signal level selection. If terminal A2 is used, check DIPswitch S1 parameter H3-08. If terminal A3 is used, check parameter H3-08. Refer to Terminal A2 Input Signal Selection on page 79.Selection for the sink/source mode and theinternal/external power supply is incorrect. Check jumper S3. Refer to Sinking/Sourcing Mode Switch for Digital Inputs on page 77.Frequency reference is too low. • Check the frequency reference monitor (U1-01).• Increase the frequency by changing the maximum output frequency (E1-09).Multi-function analog input is set up toaccept gain for the frequency reference, butno voltage (current) has been provided.• Check the multi-function analog input settings.• Check if analog input A1, A2, or A3 is set for frequency reference gain (H3-02, H3-10, H3-06 = 1). If so, check if the correct signal isapplied to the terminal. The gain and the frequency reference will be 0 if no signal is applied to the gain input.• Check if H3-02, H3-10, and H3-06 have been set to the proper values.• Check if the analog input value has been set properly. (U1-13 to U1-15)The button was pressed whenthe drive was started from a REMOTEsource.• When the button is pressed, the drive will decelerate to stop.• Switch off the Run command and then re-enter a new Run command.• The button can be disabled when o2-02 is set to 0.Motor starting torque is too low. Refer to Motor Performance Fine-Tuning on page 296Frequency reference value is too low or thedrive does not accept the value entered. Enter a value that is above the minimum output frequency determined by E1-09.The sequence Start/Stop sequence is set upincorrectly.• If the drive is supposed to be set up for a 2-wire sequence, then ensure parameters H1-03 through H1-08 are not set to 0.• If the drive is supposed to be set up for a 3-wire sequence, then one of the parameters H1-03 through H1-08 must be set to 0. Terminal S1will become the Start, terminal S2 will become the Stop input.Cause Possible SolutionsPhase wiring between the drive and motor is incorrect.• Check the motor wiring.• Switch two motor cables (U, V, and W) to reverse motor direction.• Connect drive output terminals U/T1, V/T2, and W/T3 in the right order to match motor terminals U, V, and W.• Change the setting of parameter b1-14.The forward direction for the motor is setup incorrectly.Typically, forward is designated as being counterclockwise when looking from the motor shaft (see figure below).1. Forward Rotating Motor (looking down the motor shaft)2. Motor ShaftSTOPSTOPSTOP12
