YASKAWA A1000 HHP Programming Manual page 191

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 was applied while motor was
coasting
The motor control method and motor do not
match
The rated output current of the drive 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 card connection to port CN5-A is
faulty
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
• Check the motor cables.
• Remove the short circuit and reapply power to the drive.
• 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 drive if the current value exceeds the rated current.
• 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 it is not possible to set the proper amount of torque, make the following changes:
• Increase the acceleration time (C1-01, C1-03, C1-05, C1-07)
• 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 the MC does not trip while the drive is outputting current.
• Check the ratios between the voltage and frequency.
• Set parameters 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 on page
main circuit lines, and ground wiring.
• Check if the fault occurs simultaneously with overexcitation function operation.
• Consider motor flux saturation and reduce the value of n3-13 (Overexcitation Deceleration Gain).
• Set b3-01 to 1 to enable Speed Search at Start.
• Program the Speed Search command input through one of the multi-function contact input terminals
(H1-oo = 61 or 62).
• Check the control mode.
• For IM motors, set A1-02 to 0, 1, 2, or 3.
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 to be installed. Contact Yaskawa for assistance.
PG option cards are supported by option ports CN5-B and CN5-C only. Connect the PG option card to
the correct option port.
Option Card Fault at Option Port CN5-A
oFA01
Option not properly connected
• Turn off the power 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 a different option port. If the
option card works properly in a different option port, CN5-A is damaged, and the drive requires
replacement. If the error persists (oFb01 or oFC01 occur), replace the option card.
231 and check the control circuit lines,
Fault Name
Possible Solution
Fault Name
Possible Solution
2.4 Fault Detection
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2
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