WFCO WF-8855E, Operator'S Manual

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Automatic Cooling Fan
The cooling fan in the WF-8855E Series Converter-Chargers is controlled by the
current (Amperage) load attached to the converter, NOT by temperature. 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
In the event that the output current exceeds the maximum rating for the WF-8855E 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-8855E 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 qualified service
technician.
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Figure 1