If the leads are not in the correct position as noted in
Figure 3.35:
Install them correctly.
If leads are installed correctly:
Go to “Step 6: Bypassing the Power Regulator Board”.
Test 6:
— Bypassing the Power Regulator Board
Remove the Power Regulator Board and keep it totally
isolated from the generator.
• Connect 12VDC to the brush leads (Figure 3.36).
• Connect the positive (+) 12 volt battery terminal to the
positive (+) brush (nearest the rotor bearing).
• Connect the negative (-) 12 volt battery terminal to the
negative (-) brush.
• Start the engine.
Measure the voltage at the excitation wire #2 and #6 (blue
and red). At least 60VAC should be measured.
Measure the voltage at the 120VAC receptacle. At least
60VAC should be measured.
If voltage measured at the outlets and excitation leads is
60VAC or greater, and winding resistances are within
specification:
• The rotor and stator windings are alright. Replace the
power regulator board.
If voltage at both the excitation winding and (AC) outlets
are low:
• There is a failure in the rotor and stator windings.
Refer to “Checking Rotor Resistance”, “Checking Stator
Windings”, and/or “Rotor Current Draw Test.”
If the voltage is below 60VAC at the outlets, but above
60VAC at the excitation leads:
• Shut the unit down.
• Disconnect the stator power leads from the control
panel (wires #11, #22, and #44 or blue, red, and grey
wires).
• Start the engine.
Measure the (AC) output across wires #11 and #22, or the
blue and red wires.
Measure the (AC) output across wires #44 and #22, or the
grey and red wires.
If the voltage is above 60VAC at the stator power leads but
not at the (AC) outlets:
• There is a failure in the control panel, (i.e. wiring,
circuit breakers, etc.).
If voltage is below 60VAC at the stator power leads:
• The failure is in the stator power windings.
Test 7:
— Check Rotor
Little or no (AC) output voltage can be caused by a rotor
failure.
NOTE:
The voltage surge that occurs at the
moment of rotor failure can result in damage to the
Power Regulation Board. For that reason, if a rotor
has failed, be sure to check the power regulator
board.
79
Section 3 • Generator Diagnostics and Adjustments
Portable Generator Familiarization & Troubleshooting Guide
Figure 3.36 — Bypassing Power Regulator Board
Figure 3.35 — Power Regulator Board Connections
Содержание 86262GS
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