u PID Output FaultCause Possible SolutionsNo PID feedback input.• Check the multi-function analog input terminal settings.• Set multi-function analog input terminal A1, A2, or A3 for PID feedback (H3-02, H3-10, orH3-06 = B).• A signal input to the terminal selection for PID feedback is needed.• Check the connection of the feedback signal.• Check the various PID-related parameter settings.• No PID feedback input to the terminal causes the value detected to be 0, causing a PID faultand the drive to operate at max frequency.The level of detection and the target value do notcorrespond with each other.• PID control keeps the difference between target and detection values at 0. Set the input levelfor the values relative to one another.• Use analog input gains H3-03, H3-07, and H3-11 to adjust PID target and feedback signalscaling.Reverse drive output frequency and speed detection.When output frequency rises, the sensor detects aspeed decrease. Set PID output for reverse characteristics (b5-09 = 1).Adjustment made to PID parameter settings areinsufficient. Refer to b5: PID Control on page 160 for details.u Insufficient Starting TorqueCause Possible SolutionsAuto-Tuning has not yet been performed. Perform Auto-Tuning. Refer to Motor Performance Fine-Tuning on page 290.Only Stationary Auto-Tuning was performed. Perform Rotational Auto-Tuning.u Motor Rotates after the Drive Output is Shut Off (Motor Rotates During DC InjectionBraking)Cause Possible SolutionsDC Injection Braking is set too low and the drivecannot decelerate properly.• Adjust the DC Injection braking settings.• Increase the current level for DC Injection Braking Current (b2-02).• Increase the DC Injection Braking time at stop (b2-04).The stopping method is set so that the drive coasts tostop. Set b1-03 (Stopping Method Selection) to 0 or 2.u Output Frequency is Not as High as Frequency ReferenceCause Possible SolutionsFrequency reference is set within the range of the JumpFrequency.• Adjust the parameters used for the Jump Frequency function (d3-01, d3-02, d3-03).• Enabling the Jump Frequency prevents the drive from outputting the frequencies specified inthe Jump range.Upper limit for the frequency reference has beenexceeded.• Set the maximum output frequency and the upper limit for the frequency reference to moreappropriate values (E1-04, d2-01).• The following calculation yields the upper value for the output frequency:E1-04 x d2-01 / 100Large load triggered Stall Prevention function duringacceleration.• Reduce the load.• Adjust the Stall Prevention level during acceleration (L3-02).u Sound from MotorCause Possible SolutionsExceeded 110% of the rated output current of the drivewhile operating at low speeds.• If the output current rises too high at low speeds, the carrier frequency is automatically reducedand causes a whining or buzzing sound.• If the sound is coming from the motor, disable carrier frequency derating (L8-38 = 0).• Disabling the automatic carrier frequency derating increases the chances of an overload fault(oL2). Switch to a larger capacity motor if oL2 faults occur too frequently.6.10 Troubleshooting without Fault DisplayYASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual 3356 Troubleshooting
