K
Hello Everyone,
I hope you enjoyed your Easter.
My machine is a frame 9E, running on liquid fuel and the control system is Mark VIe.
After a normal shutdown, the following alarms were observed and still active:
DC Power Supply undervoltage
IO pack communication fault
PPDA Pbus (R) source fault
PPDA Pbus (S) source fault
PPDA Pbus (T) source fault
PPDA Bus (S) not Regulating
PPDA Bus (T) not Regulating
Battery 125Vdc ground
PPDA 125Vdc Pbus feed fault
PPDA/JPDD 125Vdc power feed fault
The following diagnostic alarms were also present and still active in ToolBoxST :
PPDA (PackR) Total communication failure between PackR (JA1) and controller, Fault number : Error.
PPDA (PackR) (JA1) I/O communication failure between PackR and controller, Fault number : Error.
All LEDs except communication LEDs on the PPDA pack were found blinking faintly at about 1/4 of a second.
These alarms have enunciated and cleared within seconds on few occasions whiles the unit was running.
The communication LEDs on the R and S IONet switches were off.
28Vdc on the PDM board were maesured and was ok
125vdc on the JPDF board was measured and was ok
125Vdc battery source on JPDF board was measured and was ok with voltage on Positive leg exactly equal to voltage on the negative leg.
Dc Power on all JPDD cards are ok
All I/O packs and Boards are working ok
All network switches are working ok
Controller states are in controlling and all are equal.
JPDM and JPDF are simplex.
With the above information, I have concluded that the PPDA I/O pack is faulty and need to be replaced,am I right?
Since we don't have a spare of the PPDA card at the moment,can we start and run the unit with the IO start-up permissive forced without the PPDA card monitoring and giving voltage levels feedback to the controller?
What could be the possible consequences to run the turbine without a functional PPDA I/O Pack.
Your views would be very much cherished.
Many thanks.
I hope you enjoyed your Easter.
My machine is a frame 9E, running on liquid fuel and the control system is Mark VIe.
After a normal shutdown, the following alarms were observed and still active:
DC Power Supply undervoltage
IO pack communication fault
PPDA Pbus (R) source fault
PPDA Pbus (S) source fault
PPDA Pbus (T) source fault
PPDA Bus (S) not Regulating
PPDA Bus (T) not Regulating
Battery 125Vdc ground
PPDA 125Vdc Pbus feed fault
PPDA/JPDD 125Vdc power feed fault
The following diagnostic alarms were also present and still active in ToolBoxST :
PPDA (PackR) Total communication failure between PackR (JA1) and controller, Fault number : Error.
PPDA (PackR) (JA1) I/O communication failure between PackR and controller, Fault number : Error.
All LEDs except communication LEDs on the PPDA pack were found blinking faintly at about 1/4 of a second.
These alarms have enunciated and cleared within seconds on few occasions whiles the unit was running.
The communication LEDs on the R and S IONet switches were off.
28Vdc on the PDM board were maesured and was ok
125vdc on the JPDF board was measured and was ok
125Vdc battery source on JPDF board was measured and was ok with voltage on Positive leg exactly equal to voltage on the negative leg.
Dc Power on all JPDD cards are ok
All I/O packs and Boards are working ok
All network switches are working ok
Controller states are in controlling and all are equal.
JPDM and JPDF are simplex.
With the above information, I have concluded that the PPDA I/O pack is faulty and need to be replaced,am I right?
Since we don't have a spare of the PPDA card at the moment,can we start and run the unit with the IO start-up permissive forced without the PPDA card monitoring and giving voltage levels feedback to the controller?
What could be the possible consequences to run the turbine without a functional PPDA I/O Pack.
Your views would be very much cherished.
Many thanks.