Yaskawa Z1000U HVAC Matrix Bypass - Manual (Page 231)

6.3 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 111 .
If problems occur that are not covered in this manual, contact the nearest Yaskawa representative with the following
information:
• Bypass model (located on nameplate inside bypass enclosure)
• Software version
• Date of purchase
• Description of the problem
Table 6.3 contains descriptions of the various types of alarms, faults, and errors that may occur during operation.
Table 6.3 Types of Alarms, Faults, and Errors
Type Drive Response
Faults
When the bypass 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 TB1 11 and 12 will close, and TB1 10 and 11 will open.
The bypass will remain inoperable until the fault is cleared.
Refer to Fault Reset Methods on page 264 .
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.
• 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 bypass 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.
6.3 Drive Alarms, Faults, and Errors
YASKAWA SIEP YAIZ1D 01A Z1000U HVAC MATRIX Drive Bypass Technical Manual 231
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Diagnostics & Troubleshooting