Woodward Large Electric Sonic Valve II, Инструкция по установке и эксплуатации, Страница: 51 / 66

Manual 35076 LESV II
Woodward 49
Symptom Possible Causes Remedies
Upon enabling, valve will open
and then fail closed
Resolver sine and cosine wires
are swapped, and sine wires
high and low are flipped Conduct continuity check.
Resolver sine and cosine wires
are swapped, and cosine wires
high and low are flipped Conduct continuity check.
Poor flow accuracy
Characterization data in engine
control does not match the valve Verify characterization data
matches the valve serial
number.
Build-up of contamination on the
seat Remove valve and inspect flow
elements.
Poor position stability One motor wire disconnected Conduct continuity check.
Valve stem resolver indicates
position error
Incorrect parameter file loaded Verify the parameter file
matches the valve serial
number.
Valve stem resolver wires not
properly connected between
DVP and actuator Contact manufacture for
instructions or return to
manufacturer for repair.
Faulty resolver Return to manufacturer for
repair.
Drive train failure Return to manufacturer for
repair.
High overboard vent leakage
Internal seals damaged Return to manufacturer for
repair.
High seat leakage
Damage to valve seat or plug Remove valve and inspect flow
elements. Return to
manufacturer for repair.
Contamination buildup in seat or
plug Remove valve and inspect flow
elements. Return to
manufacturer for repair.
Valve not fully closed Remove valve and verify plug is
not properly seated. Return to
manufacturer for repair.
External gas fuel leakage
Piping flange gaskets missing or
deteriorated Replace gaskets.
Piping flanges improperly
aligned Rework piping as needed to
achieve alignment requirements
detailed in Chapter 3.
Piping flange bolts improperly
torqued Rework bolts as needed to
achieve torque requirements
detailed in Chapter 3.
Packing missing or deteriorated Return actuator to Woodward for
service.
SIL2 sensor output
out of range at 0 %
or 100 % travel (see
specifications)
Piping flange gaskets missing or
deteriorated Replace gaskets.
Incorrect sensor wiring Verify supply voltage and sensor
output connections are correct.
Incorrect supply voltage Verify sensor supply voltage is
within specifications.
Faulty sensor Install replacement sensor.
Released