6.8 Troubleshooting without Fault Display 6.8 Troubleshooting without Fault Display This section describes troubleshooting problems that do not trip an alarm or fault. u Cannot Change Parameter Settings u Motor Does Not Rotate Properly after Pressing RUN Button or after Entering External Run Command n Motor Does Not Rotate 134 SIEP C710606 33A OYMC AC Drive – J1000 User Manual Cause Possible Solutions The drive is running the motor (i.e., the Run command is present). • Stop the drive and switch over to the Programming Mode. • Most parameters cannot be edited during run. The Access Level is set to restrict access to parameter settings.
• Set the Access Level to allow parameters to be edited (A1-01 = 2). The operator is not in the Parameter Setup Mode (the LED screen will display “PAr”). • See what mode the LED parameter is current set for. • Parameters cannot be edited when in the Setup Mode (“STUP”). Switch modes so that “PAr” appears on the screen. The wrong password was entered. • If the password entered to A1-04 does not match the password saved to A1-05, then drive settings cannot be changed. • Reset the password. If you cannot remember the password: • Display parameter A1-04. Press the STOP button while pressing at the same time. Parameter A1-05 will appear. • Set a new password to parameter A1-05.
Undervoltage was detected. • Check the drive input power voltage by looking at the DC bus voltage (U1-07). • Check all main circuit wiring. Cause Possible Solutions The drive is not in the Drive Mode. • Check if the DRV light on the LED operator is lit. • Enter the Drive Mode to begin operating the motor. Refer to The Drive and Programming Modes on page 57. 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 button LED must be on, if the source is REMOTE, it must be off. Take the following step to solve the problem: • Push the button. A Fast-Stop was executed and has not yet been reset.
Reset the Fast-Stop command. Settings are incorrect for the source that provides the run command. Check parameter b1-02 (Run Command Selection). Set b1-02 so that it corresponds with the correct run command source. 0: LED operator 1: Control circuit terminal (default setting) 2: MEMOBUS/Modbus communications There is faulty wiring in the control circuit terminals. • 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 the frequency reference from the incorrect source. Check parameter b1-01 (Frequency Reference Selection 1). Set b1-01 to the correct source of the frequency reference. 0:
LED operator 1: Control circuit terminal (default setting) 2: MEMOBUS/Modbus communications 3: Potentiometer (option) The terminal set to accept the main speed reference is set to the incorrect voltage and/or current. Check DIP switch S1. Next assign the correct input level to terminal A1 (H3-01). Refer to DIP Switch S1 Analog Input Signal Selection on page 46. Selection for the sink/source mode is incorrect. Check DIP switch S3. Refer to Sinking/Sourcing Mode Switch on page 44. 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 to accept gain for the frequency reference, but no voltage (current) has been provided. • Check the multi-function analog input settings. • Check if H3-02 has been set to the proper values. • Check if the analog input value has been set properly. The STOP button was pressed when the drive was started from a REMOTE source. • When the STOP button is pressed, the drive will decelerate to stop. • Switch off the run command and then re-enter a run command. • The STOP button is disabled when o2-02 is set to 0. Motor is not producing enough torque. • Ensure the selected V/f pattern corresponds with the characteristics of the motor being used.
• Increase both the minimum and mid output frequency voltages (E1-08, E1-10). Increase the frequency reference so that it is higher than the minimum frequency reference (E1-09). Increase the torque compensation gain (C4-01).