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Manual 26174
EGCP-2 Engine Generator Control Package
Woodward
165
Mains/Bus Sensing
Problem Probable
Cause
Corrective
Action
Unit(s) do not respond to
loss of mains
Shutdown/alarm set points
for mains sensing not set
for LOSS OF MAINS
Appropriately set mains
high/low frequency and
high/low voltage set points
in shutdown/alarm menu.
See description of set
points.
Unit(s) do not have an
active auto switch input
Switch unit(s) to the Auto
switch active position. See
dc inputs/outputs.
Unit does not recognize
when mains are in spec.
Set points for mains
high/low frequency and
high/low voltage in
shutdown/alarm menu are
set too tight for sensing
when mains are in spec
Increase Mains high
frequency and voltage and
decrease mains low
frequency and voltage set
points in the
shutdown/alarm menu. See
description of set points.
Communications
Problem Probable
Cause
Corrective
Action
A unit number(s) does not
show up in the sequencing
order in the sequencing
screen
RS-485 Network is
inadequately terminated
Verify that the RS-485
Network is correctly
terminated. See inter-
control communications
(RS-485).
RS-485 Network not
connected at unit(s)
Verify that the RS-485
Network is connected to the
EGCP-2 RS-485 input at all
units.
RS-485 network is
connected with reverse
polarity at one or more units
Verify the polarity of the RS-
485 network on all units.
If a unit with the network
termination is powered
down, communications
become unreliable or
completely cease
+5 Vdc power supply is not
linked between units
(inadequate wiring)
Verify that the +5 Vdc
power supply is linked
between all units.