Hello All,
What can cause all three TCEA cards of protection module <P> stop functioning, at the same moment?
Theirs green LED bars stop running. Recycling power from <PD> returns them back to life and unit runs normally.
We've replaced two common cards of <P> - power supply card and TCTG.
No 125VDC GND Alarm present when the problem occurs.
It happend at Fuel Changeover from Liquid to Gas, immediately with 20FL-1 closed feedback we get Hyd Trip Press Low both at liquid and gas circuits.
There is no feedback from 20FG-1 solenoid. Both 20FL-1 and 20FG-1 are operated from <P>. We will check them electrically at next opportunity.
Alarm sequence attached:
Please, your thoughts and suggestions would be appreciated.
Thanks.
What can cause all three TCEA cards of protection module <P> stop functioning, at the same moment?
Theirs green LED bars stop running. Recycling power from <PD> returns them back to life and unit runs normally.
We've replaced two common cards of <P> - power supply card and TCTG.
No 125VDC GND Alarm present when the problem occurs.
It happend at Fuel Changeover from Liquid to Gas, immediately with 20FL-1 closed feedback we get Hyd Trip Press Low both at liquid and gas circuits.
There is no feedback from 20FG-1 solenoid. Both 20FL-1 and 20FG-1 are operated from <P>. We will check them electrically at next opportunity.
Alarm sequence attached:
Please, your thoughts and suggestions would be appreciated.
Thanks.