Yaskawa Z1000 AC Drive HVAC - Manual (Page 194)

5.3 Drive Alarms, Faults, and Errors
u Types of Alarms, Faults, and Errors
Check the HOA keypad for information about possible faults if the drive or motor fails to operate. Refer to Using the HOA
Keypad on page 101 .
If problems occur that are not covered in this manual, contact the nearest Yaskawa representative with the following
information:
• Drive model
• Software version
• Date of purchase
• Description of the problem
Table 5.4 contains descriptions of the various types of alarms, faults, and errors that may occur while operating the drive.
Table 5.4 Types of Alarms, Faults, and Errors
Type Drive Response
Faults
When the drive detects a fault:
• The HOA keypad displays text indicating the specific fault and the ALM indicator LED remains lit until the fault is reset.
• The fault interrupts drive output and the motor coasts to a stop.
• Some faults allow the user to select the stopping method when the fault occurs.
• Fault output terminals MA-MC will close, and MB-MC will open.
The drive will remain inoperable until the fault is cleared.
Refer to Fault Reset Methods on page 227 .
Minor Faults and
Alarms
When the drive detects an alarm or a minor fault:
• The HOA keypad displays text indicating the specific alarm or minor fault, and the ALM indicator LED flashes.
• The drive continues running the motor, although some alarms allow the user to select a stopping method when the alarm
occurs.
• A multi-function contact output set to be tripped by a minor fault (H2-  = 10) closes. If the output is set to be tripped
by an alarm, the contact will not close.
• The HOA keypad displays text indicating a specific alarm and the ALM indicator LED flashes.
Remove the cause of the problem to reset a minor fault or alarm.
Operation Errors
An operation error occurs when parameter settings conflict or do not match hardware settings (such as with an option card).
When the drive detects an operation error:
• The HOA keypad displays text indicating the specific error.
• Multi-function contact outputs do not operate.
The drive will not operate the motor until the error has been reset. Correct the settings that caused the operation error to clear
the error.
Tuning Errors
Tuning errors occur while performing Auto-Tuning.
When the drive detects a tuning error:
• The HOA keypad displays text indicating the specific error.
• Multi-function contact outputs do not operate.
• Motor coasts to stop.
Remove the cause of the error and repeat the Auto-Tuning process.
Copy Function Errors
Copy Function Errors occur when using the HOA keypad or the USB Copy Unit to copy, read, or verify parameter settings.
• The HOA keypad displays text indicating the specific error.
• Multi-function contact outputs do not operate.
Pressing any key on the HOA keypad will clear the fault. Investigate the cause of the problem (such as model incompatibility)
and try again.
5.3 Drive Alarms, Faults, and Errors
194 YASKAWA ELECTRIC TOEP YAIZ1U 03A YASKAWA AC Drive – Z1000 User Manual