Yaskawa YASNAC PC NC Maintenance Manual - Manual (Page 58)

Chapter 4: Troubleshooting PC NC Maintenance Manual
4-37
12:Power circuit low voltage
Error Contents The main circuit input voltage went below the low voltage detection
level while driving.
Detection Methods The main circuit AC low voltage signal is consistent with the control
card from the R/S phase voltage.
Cause and measures
13:Control circuit low voltage
Error Contents The control circuit power supply went below the low voltage detection
level.
Detection Methods The power supply voltage signal for the control circuit is consistent
with the gate driver, and outputs to the control card (2CN-12).
An alarm process is performed if this detection method level continues
5 seconds and the control circuit low voltage detection level is (200V)
or lower.
Cause and measures
14: Power failure for servo driver
Error Contents The control voltage supplied to the servo driver is abnormal.
Detection Methods An alarm process is performed and the gate is blocked (regeneration
operation stop) if power supply for the servo driver has continued in the
off position from 24V±5% for 5 seconds.
Cause Measures
Main power supply (R, S, T) voltage is
low. Adjust the power supply voltage within the specification
value.
Main power supply (R, S, T) open phase,
wavy warp, momentary power failure Check the power supply ripple.
Normalize the power supply.
Cause Measures
Control power supply (A1, A2) voltage is low. Check the control power supply voltage.
Adjust the power supply voltage within the specification
value.