Yaskawa YASNAC PC NC Maintenance Manual - Manual (Page 32)

Chapter 4: Troubleshooting PC NC Maintenance Manual
4-11
(22) Alarm Numbers 3361 to 3365 (Wire Break in Current Instruction
Cable)
Contact your Yaskawa customer service representative after checking
the following:
• Whether the alarm occurs immediately after the control
power is turned ON.
• Whether an alarm other than the current instruction cable
breakage alarm occurs.
(23) Alarm Numbers 3371 to 3375 (Open Phase Detection)
Contact your Yaskawa customer service representative after
checking the following:
• Whether the alarm occurs immediately after the control
power is turned ON.
• Whether the alarm occurs after turning ON the main
power.
Troubleshooting (2)
Check both the drive unit and the PC NC unit for systems equipped with a
drive unit compatible with YENET1 200. If a fault is detected, the drive
unit notifies the PC NC unit of the alarm information in both systems.
The drive unit first gives the PC NC unit the information on the occurrence
of an alarm (Alarm Number 3101 to 3105 and Number 3201) and then the
content of the alarm. The NC unit displays alarm Number 3100 when it
receives the alarm information from the drive units.
Therefore, three alarms usually occur if an error is detected in the drive
unit. If a blown fuse occurs with the X-axis servo unit, Alarm Numbers
3100, 3101, and 3021 occur.
(1) Alarm Numbers 3021 to 3025 (Fuse Blown)
The main circuit of the servo unit may be faulty.
The servo unit detects the error.
Contact your Yaskawa customer service representative.