“troubleshooting made easy” troubleshooting guide for the

WF-9900 Series60/90 Amps Power Center

© WFCO 7.2016 AD-SC-0010-1

“Troubleshooting Made Easy”

Troubleshooting Guide for the WF- 8855E Deck Mount

Visit the support section on our website for a growing library of helpful resources.

2021 Aeroplex Drive North-Elkhart, IN. 46514 P. 877-294-8997 F. 574-294-8698 www. wfcoelectronics.com

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Is RV connected to a 110 Vac Source? No DC output

from converter.Yes

Yes

Yes

Yes

Yes

No

No

No

No

No

Converter is functioning properly.

Converter is functioning properly.

Find the converter and remove thereverse polarity fuses. Are the fuses blown?

Check wire at battery and converter for reversed connection. Is wiringcorrect?

Correct wiring and replace blown reverse polarity fuses with good fuses using same size and rating.Measure DC voltage across negative lug and positive lug on the converter.Is the voltage 13.6 VDC (+/- 0.2) and all DC items operating properly?

Check for loose negative wires for DC circuits. Issue is a wiring problemnot converter problem.

Converter is functioning properly.Battery needs to be checked.

With the good reverse polarity fuses installed, disconnect the battery. Apply load to the system by turning on DC ceiling lights or other DC items. Measure voltage across negative lug and positive lug on the converter.Is the voltage 13.6 VDC (+/- 0.2)?

Replace converter. Defective.

Do all DC items function properly?

Yes No

Disconnect battery and connect RV to 240 Vac power source. Do ceiling lights and other DC items operate properly?

YesNo