Woodward TecJet 110, Инструкция по установке и эксплуатации

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Manual 26185 TecJet 110 Fuel Metering System
Woodward 11
Diagnostics
The TecJet 110 may not return to minimum fuel for all faults. The
engine, turbine, or other type of prime mover should be equipped
with an overspeed, misfire, detonation detection shutdown device(s),
that operate totally independently of the prime mover control
device(s) to protect against runaway or damage to the engine,
turbine, or other type of prime mover with possible personal injury or
loss of life should the TecJet 110 system fail. An independent fuel
shutoff device should also be used to shut off fuel flow in case the
TecJet 110 system fails.
The valve continuously performs a variety of diagnostic checks. Diagnostic
events are classified as warnings, errors or status indications. The status output
indicates the overall status of the valve. For more detailed information and a
complete list of the diagnostics, see the User Guide in the TecJet Service Tool. A
brief summary follows:
Warnings:
A warning indicates a condition that may require an operator’s attention or
intervention. For example, the valve may be operating in conditions that are
outside its specification range, or a failure has occurred for which there is a back-
up mode of operation, possibly with reduced accuracy or performance. If any
warnings are active, the status output is “off”.
Errors:
An error indicates a problem that prevents the valve from operating. The valve
closes, if possible, and remains inoperable until power is cycled. If the error
persists, the valve requires service. If any errors are active, the status output is
“off”.
Status indications:
The valve provides the following status indications:
•
Zero flow detected
—The flow demand is not present or is not valid. The
valve is closed and the status output is “off”.
•
Zero pressure detected
—The pressure across the valve is essentially
zero, so no flow can occur. The valve is closed and the status output is “off”.
•
Flow not reached
—The valve cannot achieve the demanded flow given the
present operating conditions (fuel gas temperature and pressure, delta
pressure, gas K and density). The status output is “off”.
•
Overall status OK
—There are no errors or warnings, and the Flow not
detected, Zero flow detected, and Flow not reached status indications are
not true. The status output is “on”.
See Chapter 5 (Troubleshooting) for more information on non-normal operation.
Run Hours Counter
The valve maintains a running hours counter that can be viewed or reset with the
service tool. Running hours do not accumulate when the “Flow not detected”
status indication is true.