YASKAWA GPD 505/P5 - RH Dynbrk Resistor; RR Dynbrk Transistr

PP.P5G5.03.Troubleshoot
Page 12
Rev. 06/11/2003
The braking transistor has failed.
230V Units - 0.4kW ~ 7.5kW
460V Units - 0.4kW ~ 15kW
RR
DynBrk Transistr
The braking resistor temperature has exceeded the
allowable value.
(Protects Yaskawa 3% duty cycle resistors only)
Can be selected as a minor fault by using the multi-
function outputs.
RH
DynBrk Resistor
Possible Cause(s):
Shorted braking transistor, high DC bus voltage, defective braking
resistor.
Corrective Action: Replace defective transistor or resistor, monitor DC bus level.
Possible Cause(s): Overhauling load, extended braking duty cycle, defective braking
resistor.
Corrective Action: Verify braking duty cycle, monitor DC bus voltage, replace resistor.
505
N/A
N/A
Fault Codes
Major Fault - Motor coasts to a stop, the fault is displayed on the digital
operator, and the fault relay is activated.
506 √ 515 √