Woodward 2301E-ST, Инструкция по установке и эксплуатации

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Manual 26694 2301E-ST
Woodward 94
Chapter 6.
Troubleshooting
Introduction
The following troubleshooting guide is an aid in isolating trouble to the control box, actuator, plant wiring,
or elsewhere. Troubleshooting beyond this level is recommended ONLY when a complete facility for
control testing is available.
Incorrect voltage can damage the control. When replacing a control,
check the power supply, battery, etc., for the correct voltage.
Troubleshooting Procedure
This chapter is a general guide for isolating system problems. The guide assumes that the system wiring,
soldering connections, switch and relay contacts and input and output connections are correct and
function properly. Make the checks in sequence. Various system checks assume that the prior checks
have been done correctly.
Be prepared to make an emergency shutdown when starting the
engine, turbine, or other type of prime mover, to protect against
runaway or overspeed with possible personal injury, loss of life, or
property damage.
Control Start-up
When the control is powered on, the CPU begins execution of a section of the software program known
as the boot code. This code performs hardware diagnostics and checks that a valid application program
has been installed. During this period all control outputs will remain disabled. The boot code takes
approximately 1.5 seconds to execute. During this period the red status LED should be red. When
execution of the boot code has completed, control will be transferred to the application program. When
the application program begins, the control outputs will be enabled and system control will begin. At that
point the red status LED will be turned green and should remain on as long as the control is running.
If the control fails its self-test diagnostics during boot, fails its on-line self-tests while running the
application program, or fails in any other way that it can detect, then the CPU will blink the red status LED
to indicate the failure. If the CPU LED is blinking, the unit has failed and needs to be returned.
To prevent damage to the prime mover, the prime mover must be
shut down for all system checks.
Released