Repair Manual Mobile Generator - Wacker Neuson
Repair Manual Mobile Generator - Wacker Neuson
Repair Manual Mobile Generator - Wacker Neuson
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G 70 Output Voltage Troubleshooting<br />
8.8 Checking the AVR Sensing/Power Wires<br />
Prerequisites <strong>Generator</strong> shut down<br />
Procedure Follow the procedure below to check the AVR sensing/power wires.<br />
1. Open the large hinged panel and locate the Engine Control Module (ECM) and<br />
the Automatic Voltage Regulator (AVR).<br />
2. Disconnect the 4-pin connector (it has 3 wires) from the ECM.<br />
3. Remove the green and black wires from the AVR.<br />
4. Measure the resistance across the green and black wires.<br />
Is 0.2–1.0 Ohms measured?<br />
Yes ____ No ____ Your reading<br />
Continue. Remove the vent cover from the generator and<br />
check the generator for damage.<br />
5. Measure the resistance between the green wire and the ground lug. Also check<br />
between the black wire and the ground lug.<br />
Is 0.2–1.0 Ohms measured?<br />
Yes ____ No ____ Your reading<br />
Continue. Remove the vent cover from the generator and<br />
check the generator for damage.<br />
6. Remove the bus bar between the neutral lug and the ground lug.<br />
7. Measure the continuity between the green wire and the ground lug. Also check<br />
between the black wire and the ground lug.<br />
Does each wire measure “OPEN” or “OL” to the ground lug?<br />
Yes ____ No ____ Your reading<br />
The sensing wires<br />
are OK.<br />
This procedure continues on the next page.<br />
wc_tx000958gb.fm 75<br />
Remove the vent cover from the generator and<br />
check the generator for damage.
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