Woodward EGCP-2 - Chapter 8. Troubleshooting; Control Hardware and I;O

EGCP-2 Engine Generator Control Package Manual 26174
158 Woodward
Chapter 8.
Troubleshooting
Control Hardware and I/O
Problem Probable Cause Corrective
A
ction
Unit does not power up No input power supply Check input power supply
on terminals 1 and 2. This
input must be 9 to 32 Vdc.
Input power supply
reversed
Ensure proper polarity of
power supply to EGCP-2.
Unit powers up and then
cycles on and off when
cranking
Weak Engine Battery or
Engine Battery voltage
dropping below 6 Vdc on
cranking
Charge Engine Battery, or
Replace Engine Battery.
Discrete inputs don’t show
active in I/O STATUS
screen when switches are
activated
Faulty wiring of discrete
input switches
Verify wiring of discrete
input switches.
Displayed generator
voltages are very small
Faulty wiring of generator
Potential
Transformers(PT’s)
Verify wiring of generator
Potential Transformers
(PTs).
Generator PT inputs are
improperly calibrated
Calibrate the appropriate
PT input channel(s). See
section 1.10 Calibration of
Control Inputs and Outputs.
I/O STATUS shows relay(s)
is energized, but action(i.e.
alarm) does not occur
Faulty wiring of relay output
contacts
Verify wiring of relay output
contacts.
Generator voltage
fluctuates or is unstable at
no load on generator
AVR dynamics are
improperly set up
Tune the AVR dynamics for
stable operation. See AVR
manufacturer’s instruction
manual for more details.
Voltages or currents
displayed by EGCP-2 are
different than measured
parameter
EGCP-2 PT inputs are
inaccurately calibrated
Calibrate the appropriate
PT input channel(s). See
section 1.10 Calibration of
Control Inputs and Outputs.