4
AUTOMATIC COOLING FAN
The cooling fan in the WF-68100-AD Series Converter-Chargers is 2-stage and is controlled by
the current drawn out of the converter to the applied load. The on-board microprocessor
increases fan speed as the total load increases and decreases fan speed as the load decreases.
Unlike traditional temperature-controlled fans, the load-controlled fan provides better
component cooling by avoiding temperature spikes which can lead to premature
component failure.
OVER-TEMPERATURE PROTECTION
If the internal temperature of the converter exceeds a critical point, it will shut down. This
protects the unit from excessive heat that may damage sensitive components. The unit will
restart once the temperature inside has dropped.
ELECTRONIC CURRENT LIMITING
If the output current exceeds the maximum rating for the WF-68100-AD Series
Converter-Charger, the output current will remain constant, but the output voltage will begin to
drop. If this occurs, the unit will recover once loads are reduced.
SHORT-CIRCUIT PROTECTION
Should a short circuit occur in the RV, the WF-68100-AD Series Converter-Charger will drop the
voltage output to zero volts. If the short-circuit condition is removed and no other fault
conditions are detected, the converter will resume normal operation. However, short- circuit
conditions are dangerous, and an RV will require inspection by a qualied service technician.
Figure 1
DC FUSES (12 VOLTS)
The DC fuse receptacle on the rear panel of the WF-68100-AD Series Converter-Charger has
space for 3 (three) identical Reverse Battery Protection fuses (see Figure 1 above). These
fuses should be replaced with ATC or ATO automotive type fuses, such as Littelfuse type 257 or
Bussmann type ATC. The fuses are 35 Amp.
CIRCUIT PROTECTION
WF-68100-AD Series Converter-Charger Fuses
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