Woodward 9907-252, Installation And Operation Manual

Page: 26 / 36

Load Sharing Module Manual 02035
22 Woodward
SYMPTOMS CAUSE TEST/REMEDY
Load Signal voltage is too
high. Adjusting LOAD GAIN
will not lower it. CT output too high. Check for 5 amp CT output at full load. (CT
output must be between 3 and 7 amps at
full load.) Change to a higher primary
current CT if necessary.
Engine does not properly
share load with other units. Engine not responding to signal
from Load Sharing Module. Check for maximum voltage from terminals
22 to 23. If possible check the voltage from
terminal 19 to 20. If the Load Sharing
Module is putting out a maximum signal, the
problem is either in the wiring to the engine
control, the engine control, or the engine.
Unequal speed settings. Be sure the speed settings of all off-line
units at no load are identical. Adjust as
necessary. Resynchronize.
Unequal load gain voltages. Check that load gain settings of all load
sharing units are correct. See load gain
adjustment in Chapter 3. Adjust as
necessary.
Improper load sensing phasing. Perform the transformer phasing check in
Chapter 3. Correct as necessary.
Engine does not properly
share load with other units. Circulating currents between
generators. (Noted by unequal
power factors between
generators.) Properly adjust the generator voltage
regulators.
Engine does not properly
share load with other units. Terminals 13 and 14 not
shorted. Load sharing module is
in droop. Jumper Load Sharing Module terminals 13
and 14. Observe engine operation. Replace
wiring or switch as required.