Yaskawa Z1000U HVAC Matrix Bypass - Manual (Page 262)

6.7 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 Endo 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 Endo error.
The drive may be used in the application if no cause can be identified despite the existence of an Endo error.
An Ero 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 6.11 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-oo 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.
6.7 Auto-Tuning Fault Detection
262 YASKAWA SIEP YAIZ1D 01A Z1000U HVAC MATRIX Drive Bypass Technical Manual