Wacker Neuson GP 3800A, Repair Manual

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Troubleshooting GP Repair
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6.20 High Voltage Troubleshooting—Flowchart 3A
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Check engine speed. Be sure that it
is within range limits.
Replace
the stator.
High Voltage at Receptacles
Checking AVR's sensing wires
Check the continuity of the AVR’s sensing wire
to main winding 2 by checking the continuity
between sensing wire at connection point on stator
where brown wire from AVR would connect and
terminal R or Y.
Checking AVR's sensing wires—GP 2500A
Check the continuity of the AVR’s sensing wires
from the generator plug to the DC winding plug:
brown wire to brown wire; blue to blue. Then, brown
wire to blue; blue wire to brown.
Checking sensing circuit
Continue by checking the sensing wire circuit.
Place the voltage selector switch in the 120V position.
Check continuity of the sensing wire to main winding 2
by checking between the blue wire of the plug and
terminal R or Y.
Place the voltage selector switch in the 120V/240V
position. Check continuity of the sensing wire to main
winding 1 by checking between the blue wire of the
plug and terminal B or G.
Replace
the AVR.
Repair or replace
the wiring.
Replace
the AVR.
Do
wires have
continuity?
Yes
Yes
No
Do
wires have
continuity?
No
Do
wires have
continuity?
Yes
No