Nilfisk-Advance 56110000, Service Manual

Page: 53 / 102

FORM NO. 56043124 - Condor XL
™
- 53
ELECTRICAL SYSTEM
TROUBLESHOOTING NOTES FOR KUBOTA ENGINE SPEED GOVERNING SYSTEM
Problem: Engine will not run @ high speed 2200rpm or turbo speed 2400 rpm settings
Model of governor used: APECS 3000 Mfg. by Woodward (manual # SE-4049). Additional information can be found on their website.
Possible causes
Things to check
Electrical control circuit
• With key switch ON check for battery voltage at the governor control box (B+ & B-) inputs, correct value 12 VDC.
• Press the engine speed selection button (located on the operator control panel) with engine cranking/running and test for 12VDC @
the governor speed select inputs 1 & 2. See ladder diagram for speed selection voltage relationships.
• If 0 volts check continuity of speed select input wiring from governor to the main controller.
• If wiring check is ok substitute a new main controller (driver box) & dash board panel.
• Check status lamp on governor for fault codes, reference
fl ash code table found on APEC S 3000 website.
• Test governor controller actuator out put voltage at different speed selection modes (approx value 3.9 VDC).
• Check continuity of fuel control actuator wiring.
• Test the fuel control actuator for an open circuit (speci
fi cation is 3.2 Ohms).
• With the engine cranking or running, check the governor magnetic pickup (RPM speed sensor) voltage signal (approx. x VAC).
• Remove and inspect the magnetic speed pickup sensor for damage. When reinstalling, thread sensor in until it makes contact with the
fl y wheel then back out a ½ turn.