Yaskawa GPD 506/P5 Section Three - Manual (Page 31)

PP.P5G5.03.Troubleshoot
Page 31
Rev. 06/11/2003
The motor speed has exceeded the overspeed level
when operating in the Closed Loop V/f or Closed
Loop Flux Vector modes.
OS
Overspeed Det
N/A
Feedback pulses are not received by the PG option
board.
PGO
PG open
N/A
Possible Cause(s): The load has changed considerably, the program settings are not set
correctly.
Corrective Action: Check the load on the motor, verify the program settings (F1-08 PG
Overspeed Level, and F1-09 PG Overspeed Time).
Possible Cause(s): The Pulse Generator feedback wires may be broken or not properly
connected to the PG feedback option board, torque limit set too low, motor shaft locked.
Corrective Action: Check for a broken wire or a loose connection from the Pulse
Generator, verify the program settings (F1-01 PPR, and F1-02 Feedback Loss Select),
increase the torque limits.
Fault Codes
Minor Fault
- Operation continues and the digital operator indication blinks
The fault relay does not activate.
505 506 515
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