NOTE:
for a detailed explanation of the charging modes, please refer to our publication Theory
of Operation, document #AD-TD-0001-0.
TROUBLESHOOTING INSTRUCTIONS
Troubleshooting the WF-9500MBA Series Main Board Assembly
Refer to the Troubleshooting Guide for the WF-9500MBA Series Main Board Assembly
(Figure 3) below.
Converter Output Voltage
Before checking the WF-9500MBA Series Main Board Assembly output voltage, disconnect
the battery cables at the battery. Make sure the converter is plugged into an AC source (105-
130 Volts). Check the converter output voltage at the battery with a voltmeter. Place the meter
probes on the disconnected battery cables; place the
Positive
(red) meter probe on the
+ Positive
red battery wire and place the
Negative
(black) meter probe on the
- Negative
black
wire on the battery cable. Be sure you have good connections at the cables. If the voltage reads
13.6 VDC (+/- 0.2) with no load, the converter is functioning properly.
If the converter output voltage at the battery reads 0.0 VDC, or if the battery is not charging,
check for an open inline fuse in the battery wire circuit. One may have been installed by the RV
manufacturer. Also check for loose wiring connections.
DC Reverse Polarity (Fuses)
If there is no DC output coming from the WF-9500MBA Series Main Board Assembly
converter section, first check the reverse polarity fuses on the fuse board. Then, visually inspect
the fuses for any breaks in the fuse element. If no breaks are found, use a continuity tester to
check for continuity. If the reverse polarity fuses are blown, it means the RV battery was
accidentally connected in reverse, either at the battery or at the converter. Investigate the
connections and reconnect the cables properly. Replace the fuse with the same type and
amperage rating as the original.
IMPORTANT:
These fuses protect the converter from damage in the event that the RV battery
is accidentally connected in reverse. A reversed battery connection, even if for only a second,
will cause these fuses to blow.
Figure 2
6
Summary of Contents for WF-9500MBA Series
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