Woodward MicroNet TMR 5009, Installation/Hardware Manual

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Manual 85580V2 5009 Installation/Hardware
Woodward 79
System Troubleshooting Guide
The following is a troubleshooting guide for areas to check which may present
potential difficulties. By making these checks prior to contacting Woodward for
technical assistance your system problems can be more quickly and accurately
assessed.
MECHANICAL SYSTEM
ACTUATORS
•
Is the oil clean?
•
Does the actuator have the correct hydraulic pressure (if required)?
•
Does the actuator have the correct pneumatic pressure (if required)?
•
Does the drive shaft rotate (if required)?
•
Is the actuator wiring correct?
•
Is the direction of the stroke correct?
•
Has the compensation (if so equipped) been adjusted correctly?
•
Is the hydraulic return line free and not clogged?
•
Is there backpressure on the hydraulic return line?
•
Is the feedback (if any) adjusted correctly and sending the correct signal?
LINKAGE
•
Is there slop or lost motion?
•
Is there misalignment, binding, or side loading?
•
Is there visible wear or scarring?
•
Does the linkage move smoothly?
VALVES
•
Does the valve move through it’s proper stroke smoothly?
•
Does the valve travel it’s full stroke?
•
Can mid-stroke be obtained and held?
•
Does the valve fully seat (close) before the governor reaches full minimum stroke?
•
Does the valve fully open before the governor reaches maximum stroke?
•
Is the bypass valve(s) (if any) in the proper position?
•
Are there nicks or contamination which allow steam to pass when the valve is
closed?
OIL/HYDRAULIC SYSTEM
•
Is the oil at the proper operating pressure?
•
Is the oil temperature too high for the type of oil being used?
•
Is the oil contaminated?
•
Does the actuator have sufficient flow of oil?
•
Are the accumulators (if any) charged to the correct pressure?
•
Are the filters plugged?
•
Is the oil pump operating properly?
STEAM CONDITIONS
•
Is the turbine inlet pressure at design specification?
•
Is the steam pressure in the proper operating range?
•
Are pressure transducers (if any) located close to the turbine?
•
Are there any pressure regulating devices or valves which may interfere with
governor operation or proper steam flow?
CONTROL, ALARM, AND FAULT INDICATIONS
•
Does the governor indicate it is in the correct control mode?
•
Is the governor issuing any alarms?
•
Are any of the components of the governor indicating hardware faults?
•
Does the actuator demand agree with the actual valve position?
•
Are any shut\ down conditions present?
•
Have the control dynamics been tuned to match the system response?