OM-2245 / Operation and Maintenance Manual
ITW GSE 4400 / 400 Hz. Generator Set
March 15, 2015
Chapter 2-4
Page 9
Generator Excitation Circuits
Trouble, Symptom,
Condition
Probable Cause
Test, Check, and/or Remedy
1.
No (or low)
generator output
voltage in all
phases. Generator
operating at 400 Hz.
a.
Defective generator or
excitation circuit.
In the Setup Menu, go to the Diagnostic Mode
screen (Section 1-3 Paragraph 4.20) and set it to
AVR Battery Only. This applies 24 VDC from the
battery to the exciter field, which should produce an
indicated output voltage of 100 +/- 20 VAC line to
neutral.
b.
Verify 24 VDC across
connector J6 terminals A
& B.
Check X20 on the Interface board and connector J6
at the generator.
c.
Defective connector at
voltage regulator, or
defective wiring from
regulator to exciter field
Disconnect the exciter wires at the terminal strip J6.
Using jumper leads with clip terminals, connect 24
VDC to wires. If generator produces at least 80
VAC, replace or repair the connector and wiring
between voltage regulator and exciter field as
required.