Sc Short Circuit; Puf Dc Bus Fuse Open - YASKAWA GPD 505/P5 Troubleshooting Manual

Major Fault
√ √
506 515
SC
Short Circuit
Possible Cause(s):
Corrective Action:
Remove the motor and run the inverter without the motor. Check the
motor for a phase to phase short. Check the inverter for a phase to phase short at the output.
PUF
DC Bus Fuse Open
Possible Cause(s):
Corrective Action:
Remove power from the inverter and disconnect the motor. Perform the
checks without/with power starting on page 10. Replace the shorted component(s), then
replace the defective fuse.
Fault Codes
- Motor coasts to a stop, the fault is displayed on the digital
operator, and the fault relay is activated.
505
sc
The inverter output is short-circuited.
Shorted inverter output phase to phase, shorted motor, locked rotor.
PUf
Detects if the DC bus fuse has opened.
Shorted output transistor, shorted main circuit component.
PP.P5G5.03.Troubleshoot
Page 7
Rev. 06/11/2003