Digital Operator Display Fault Name
oC
Overcurrent
Drive sensors have detected an output current greater than the specified overcurrent level.
Cause Possible Solution
The motor has been damaged due to overheating or the
motor insulation is damaged.
• Check the insulation resistance.
• Replace the motor.
One of the motor cables has shorted out or there is a
grounding problem.
• Check the motor cables.
• Remove the short circuit and power the drive back up.
• Check the resistance between the motor cables and the ground terminal .
• Replace damaged cables.
The load is too heavy.
• Measure the current flowing into the motor.
• Replace the drive with a larger capacity unit if the current value exceeds the rated current of the drive.
• Determine if there is sudden fluctuation in the current level.
• Reduce the load to avoid sudden changes in the current level or switch to a larger drive.
The acceleration or deceleration times are too short.
Calculate the torque needed during acceleration relative to the load inertia and the specified acceleration time. If the right amount
of torque cannot be set, make the following changes:
• Increase the acceleration time (C1-01, -03, -05, -07)
• Increase the S-curve characteristics (C2-01 through C2-04)
• Increase the capacity of the drive.
The drive is attempting to operate a specialized motor or
a motor larger than the maximum size allowed.
• Check the motor capacity.
• Ensure that the rated capacity of the drive is greater than or equal to the capacity rating found on the motor nameplate.
Magnetic contactor (MC) on the output side of the drive
has turned on or off.
Set up the operation sequence so that the MC is not tripped while the drive is outputting current.
V/f setting is not operating as expected.
• Check the ratios between the voltage and frequency.
• Set parameter E1-04 through E1-10 appropriately (E3-04 through E3-10 for motor 2).
• Lower the voltage if it is too high relative to the frequency.
Excessive torque compensation.
• Check the amount of torque compensation.
• Reduce the torque compensation gain (C4-01) until there is no speed loss and less current.
Drive fails to operate properly due to noise interference.
• Review the possible solutions provided for handling noise interference.
• Review the section on handling noise interference and check the control circuit lines, main circuit lines, and ground wiring.
Overexcitation gain is set too high.
• Check if fault occurs simultaneously to overexcitation function operation.
• Consider motor flux saturation and reduce the value of n3-13 (Overexcitation Deceleration Gain).
Run command applied while motor was coasting.
• Enable Speed Search at start (b3-01 = 1).
• Program the Speed Search command input through one of the multi-function contact input terminals (H1- = 61 or 62).
The wrong motor code has been entered for PM Open
Loop Vector (Yaskawa motors only) or the motor data
are wrong.
• Enter the correct motor code to E5-01.
• If a non-Yaskawa PM motor is used, enter “FFFF” to E5-01. Set the correct motor data to the E5- parameters or perform
Auto-Tuning.
The motor control method and motor do not match.
• Check which motor control method the drive is set to (A1-02).
• For IM motors, set A1-02 = “0”, “1”, “2”, or “3”.
• For PM motors, set A1-02 = “5”, “6” or “7”.
The drives rated output current is too small. Use a larger drive.
Digital Operator Display Fault Name
oFA00
Option Card Connection Error at Option Port CN5-A
Option compatibility error
Cause Possible Solution
The option card installed into port CN5-A is
incompatible with the drive.
Check if the drive supports the option card that you are attempting to install. Contact Yaskawa for assistance.
A PG option card is connected to option port CN5-A PG option boards are supported by option ports CN5-B and CN5-C only. Place the PG option card into the correct option port.
Digital Operator Display Fault Name
oFA01
Option Card Fault at Option Port CN5-A
Option not properly connected
Cause Possible Solution
The option board connection to port CN5-A is faulty.
• Turn the power off and reconnect the option card.
• Check if the option card is properly plugged into the option port. Make sure the card is fixed properly.
• If the option is not a communication option card, try to use the card in another option port. If it works there, replace the drive. If
the error persists (oFb01 or oFC01 occur), replace the option board.
Digital Operator Display Fault Name
to
oFA03 to oFA06
Option card error occurred at option port CN5-A
,
oFA10, oFA11
to
oFA12 to oFA17
to
oFA30 to oFA43
Cause Possible Solution
Option card or hardware is damaged.
• Cycle power to the drive.
• If the problem continues, replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or your nearest sales representative.
To Next Page
Loading...
Need help?
General
