Yaskawa Z1000 AC Drive HVAC - Manual (Page 222)

5.7 Auto-Tuning Fault Detection
Auto-Tuning faults in this section are displayed on the digital operator and will cause the motor to coast to a stop. Auto-Tuning
faults do not trigger a multi-function digital output set for fault or alarm output.
An End error on the digital operator display indicates Auto-Tuning has successfully completed with discrepancies in the
calculations. Restart Auto-Tuning after fixing the cause of the End error.
The drive may be used in the application if no cause can be identified despite the existence of an End error.
An Er error indicates that Auto-Tuning has not completed successfully. Check for the cause of the error using the tables in
this section, and perform Auto-Tuning again after fixing the cause.
u Auto-Tuning Codes, Causes, and Possible Solutions
Table 5.13 Auto-Tuning Codes, Causes, and Possible Solutions
HOA Keypad Display Error Name
End3 Rated Current Setting Alarm (displayed after Auto-Tuning is complete)
Cause Possible Solutions
The correct current rating printed on the motor
nameplate was not entered into T1-04
• Check the setting of parameter T1-04.
• Check the motor data and repeat Auto-Tuning.
HOA Keypad Display Error Name
End4 Adjusted Slip Calculation Error
Cause Possible Solutions
The calculated slip is outside the allowable range Make sure the data entered for Auto-Tuning is correct.
HOA Keypad Display Error Name
End5 Resistance Tuning Error
Cause Possible Solutions
The calculated resistance value is outside the
allowable range
• Double-check the data entered for the Auto-Tuning process.
• Check the motor and motor cable connection for faults.
HOA Keypad Display Error Name
End7 No-Load Current Alarm
Cause Possible Solutions
The entered no-load current value was outside the
allowable range
Check and correct faulty motor wiring.
Auto-Tuning results were less than 5% of the
motor rated current
Double-check the data entered for the Auto-Tuning process.
HOA Keypad Display Error Name
Er-01 Motor Data Error
Cause Possible Solutions
Motor data or data entered during Auto-Tuning
was incorrect
• Make sure motor data entered to T1- match motor nameplate information.
• Restart Auto-Tuning and enter the correct information.
Motor output power and motor-rated current
settings (T1-02 and T1-04) do not match
• Check the drive and motor capacities.
• Correct the settings of parameters T1-02 and T1-04.
Motor rated current and detected no-load current
are inconsistent
• Check the motor rated current and no-load current.
• Correct the settings of parameters T1-04 and E2-03.
Base frequency and motor rated speed (T1-05 and
T1-07) do not match
• Correct the settings of parameters T1-05 and T1-07.
• Check that the correct number of poles were entered to T1-06.
5.7 Auto-Tuning Fault Detection
222 YASKAWA ELECTRIC TOEP YAIZ1U 03A YASKAWA AC Drive – Z1000 User Manual