WFCO WF-9900 Series - Manual (Page 4)

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GENERAL COMPLIANCE INFORMATION
The WF-9900 Series units are UL-Listed, and cUL-Listed (Canadian).
They comply with FCC Class B requirement (see below).
FCC Compliance Class B
NOTE: This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio
communications. .
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Fig. A
Troubleshooting
Setp 1: Make sure RV is plugged into 120 volt shore power.
Go to converter and remove the front door assembly. Turn off
main breaker and remove the 4 reverse polarity fuses. Check
the fuses with a continuity meter to make sure fuses are good.
Do not reinstall the fuses back into the converter at this time.
Wait approximately one minute, then put main breaker on. Using
a DC volt meter, measure voltage between Negative and VCC lugs
on the DC fuse board. See fig. A
Voltage should read between 13.6 to 13.7 volts DC.
a. If converter does not read within this voltage range then
replace the converter.
b. If converter does read within this voltage range proceed to
Step 2.
Step 2: Turn off main breaker. Reduce load in RV by turning off
as many 12 DC items (lights, etc..) as possible. Go to the battery
and disconnect it.
Go back to the converter and replace the 4 reverse polarity fuses
you removed in step 1. Turn the main breaker on. Using a DC
voltmeter, measure voltage between Negative and VCC on the
DC fuse board. See Fig.A
Voltage should read between 13.4 to 13.6 volts DC.
a. If converter does not read within this voltage range then
replace the converter.
b. If converter does read within this voltage range, start adding
load (light, etc..) while monitoring the voltmeter. If voltage drops
below 13.4 volts DC replace the converter.
c. While adding load (lights, etc..), if voltage remains at the 13.6 to
13.7 volt DC range but no lights come on, this would indicate
there is a wiring issue.
d. If converter is in the 13.4 to 13.6 volt DC range and most of the
DC items (lights, etc..) are on, this would indicate the converter is
functioning properly.
Note: Issues pertaining to the 120 volt AC circuits should be
handled by a qualified Technician.