YASKAWA A1000 Series Technical Manual page 311

Digital Operator Display
Cause
The motor has been damaged due to overheating or the
motor insulation is damaged.
One of the motor cables has shorted out or there is a
grounding problem.
The load is too heavy.
The acceleration or deceleration times are too short.
The drive is attempting to operate a specialized motor or
a motor larger than the maximum size allowed.
Magnetic contactor (MC) on the output side of the drive
has turned on or off.
V/f setting is not operating as expected.
Excessive torque compensation.
Drive fails to operate properly due to noise interference.
Overexcitation gain is set too high.
Run command applied while motor was coasting.
The wrong motor code has been entered for PM Open
Loop Vector (Yaskawa motors only) or the motor data
are wrong.
The motor control method and motor do not match.
The drives rated output current is too small.
Digital Operator Display
Cause
The option card installed into port CN5-A is
incompatible with the drive.
A PG option card is connected to option port CN5-A
Digital Operator Display
Cause
The option board connection to port CN5-A is faulty.
Digital Operator Display
oFA03 to oFA06
to
oFA10, oFA11
,
oFA12 to oFA17
to
oFA30 to oFA43
to
Cause
Option card or hardware is damaged.
YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
Overcurrent
oC
Drive sensors have detected an output current greater than the specified overcurrent level.
• Check the insulation resistance.
• Replace the motor.
• 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.
• 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.
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.
• 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.
Set up the operation sequence so that the MC is not tripped while the drive is outputting current.
• 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.
• Check the amount of torque compensation.
• Reduce the torque compensation gain (C4-01) until there is no speed loss and less current.
• 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.
• Check if fault occurs simultaneously to overexcitation function operation.
• Consider motor flux saturation and reduce the value of n3-13 (Overexcitation Deceleration Gain).
• Enable Speed Search at start (b3-01 = 1).
• Program the Speed Search command input through one of the multi-function contact input terminals (H1-
• 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-
Auto-Tuning.
• 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".
Use a larger drive.
Option Card Connection Error at Option Port CN5-A
oFA00
Option compatibility error
Check if the drive supports the option card that you are attempting to install. Contact Yaskawa for assistance.
PG option boards are supported by option ports CN5-B and CN5-C only. Place the PG option card into the correct option port.
Option Card Fault at Option Port CN5-A
oFA01
Option not properly connected
• 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.
Option card error occurred at option port CN5-A
• 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.
6.4 Fault Detection
Fault Name
Possible Solution
.
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
= 61 or 62).
parameters or perform
6
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