Yaskawa PC NC - Manual (Page 173)

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YASNAC PCNC Operating Manual Chapter 4: Maintenance
(18)Alarm No.: 3321 to 3325 (Regeneration Error)
Contact your Yaskawa 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.
(19)Alarm No.: 3331 to 3335 (Over Voltage)
Contact your Yaskawa representative after checking the following:
• Whether the alarm occurs at the start of motor rotation.
• Whether the alarm occurs during deceleration.
(20)Alarm No.: 3341 to 3345 (Under Voltage)
Contact your Yaskawa representative after checking the following:
• Whether the alarm occurs after turning ON the main power.
(21)Alarm No.: 3351 to 3355 (Heat Sink Overheat)
(22)Alarm No.: 3361 to 3365 (Wire Break in Current Instruction Cable)
Contact your Yaskawa representative after checking the following:
• Whether the alarm occurs immediately after the control power is turned ON.
• Whether an alarm other than current instruction cable breakage alarm occurs.(23)
Alarm No.: 3371 to 3375 (Open Phase Detection)
Contact your Yaskawa 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.
Table 4.1.5.9: Troubleshooting - Alarm No.: 3351 to 3355 (Heat Sink Overheat)
CAUSE CHECK ITEM COUNTERMEASURES
Faulty control board
Check whether the alarm occurs immediately
after the control power is turned ON.
Contact your Yaskawa
representative.
Fan stop
• Check whether the alarm occurs during
operation (alarm reoccurs if the control
power is turned ON after turning it OFF
once, or the operation restarts when the
NC is reset after several minutes.)
• Check whether the fan is rotating.
Contact your Yaskawa
representative.