Digital Operator Display
Error Name
Er-08
Rated Slip Error
Cause
Possible Solutions
Motor data entered during Auto-Tuning
was incorrect.
• Make sure the data entered to the T1 parameters match the information written on the motor nameplate.
• Restart Auto-Tuning and enter the correct information.
Results from Auto-Tuning are outside the
parameter setting range or the tuning
process took too long.
• Check and correct faulty motor wiring.
• Perform Rotational Auto-Tuning.
The load was too high during rotational
Auto-tuning.
• Disconnect the motor from machine and restart Auto-Tuning. If motor and load cannot be uncoupled make
sure the load is lower than 30%.
• If a mechanical brake is installed, make sure it is fully lifted during tuning.
Digital Operator Display
Error Name
Er-09
Acceleration Error
Cause
Possible Solutions
The motor did not accelerate for the
specified acceleration time.
• Increase the acceleration time (C1-01).
• Disconnect the machine from the motor if possible.
Torque limit when motoring is too low
(L7-01 and L7-02).
• Check L7-01 and L7-02 settings.
• Increase the setting.
The load was too high during Rotational
Auto-Tuning.
• Disconnect the motor from machine and restart Auto-Tuning. If motor and load cannot be uncoupled make
sure the load is lower than 30%.
• If a mechanical brake is installed, make sure it is fully lifted during tuning.
Digital Operator Display
Error Name
Er-10
Motor Direction Error
Cause
Possible Solutions
The encoder signal lines are not properly
connected to the drive.
Check and correct wiring to the PG encoder.
Motor direction and PG direction are
opposite.
Check the motor speed monitor U1-05 while manually turning the motor forward. If the sign displayed is
negative, change the setting of parameter F1-05.
The load pulled the motor in the opposite
direction of the speed reference and the
torque exceeded 100%.
Uncouple the motor from the load and restart Auto-Tuning.
Digital Operator Display
Error Name
Er-11
Motor Speed Fault
Cause
Possible Solutions
Torque reference is too high.
• Increase the acceleration time (C1-01).
• Disconnect the machine from the motor if possible.
Digital Operator Display
Error Name
Er-12
Current Detection Error
Cause
Possible Solutions
One of the motor phases is missing:
(U/T1, V/T2, W/T3).
Check motor wiring and correct any problems.
The current exceeded the current rating of
the drive.
• Check motor wiring for a short between motor lines.
• Close any magnetic contactors used between motors.
• Replace the control board or the entire drive. For instructions on replacing the control board, contact
Yaskawa or your nearest sales representative.
The current is too low.
Attempted Auto-Tuning without motor
connected to the drive.
Connect the motor and restart Auto-Tuning.
Current detection signal error.
Replace the control board or the entire drive. For instructions on replacing the control board, contact Yaskawa
or your nearest sales representative.
2.7 Auto-Tuning Fault Detection
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
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2
Troubleshooting
Summary of Contents for A1000 HHP
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