Yaskawa YASNAC PC NC Maintenance Manual - Manual (Page 22)

Chapter 4: Troubleshooting PC NC Maintenance Manual
4-1
Chapter 4: Troubleshooting
4.1 Maintenance Data
To locate the cause of problems or when contacting your Yaskawa customer ser-
vice representative for advice, users must precisely understand the actual situation.
To minimize the downtime, check the following points carefully.
Checking the Status of Problems
(1) Understanding the Situation
To identify the nature of the problem, first check the following items.
• Type of operation that causes a problem.
Do other types of operations not cause problems?
• Q Details of problems
How, frequency (always or sometimes), and when?
• Unusual situation when the problem occurred.
• Was there an unusual external occurrence (such as power failure or
lightning) when the problem occurred?
• Timing of problem occurrence.
Did the problem occur during or after the operation of the keys, or in
a specific operation mode?
(2) Check Items
(a) Problems related with axis feed and spindle drive
Check the following items.
• Indication status of the LEDs on the drive unit
• Fuses and breakers
• When an alarm occurs, eliminate the fault and assure operation safety before resetting it. Failure to
observe this caution could result in equipment malfunction.
• For details on the machine-related sequence, refer to the machine tool manual.
CAUTION