HOA Keypad Display
Error Name
Er-03
OFF Button Input
Cause
Possible Solutions
Auto-Tuning canceled by pressing the OFF button Auto-Tuning did not complete properly. Restart Auto-Tuning.
HOA Keypad Display
Error Name
Er-04
Line-to-Line Resistance 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.
Faulty motor cable or cable connection
HOA Keypad Display
Error Name
Er-05
No-Load Current 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.
HOA Keypad 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.
HOA Keypad 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.
HOA Keypad 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.
6.7 Auto-Tuning Fault Detection
YASKAWA ELECTRIC SIEP YAIZ1B 01E YASKAWA AC Drive – Z1000 Bypass Technical Manual
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6
Diagnostics & Troubleshooting
