5
Short-Circuit Protection
Should a short circuit occur in the inverter circuit when in Pass-rough mode, the circuit
breaker supplying AC power to the inverter, or the circuit breaker located on the back panel
of the inverter, may trip. If the inverter is in inverting mode, the inverter’s internal protection
circuitry will shut the unit down and the Red Fault LED on the front panel and remote switch
will illuminate. Short-circuit conditions are dangerous and may require an inspection of the RV
by a qualied service technician.
Over/Under Input Protection
e WF-5118/5120 Inverters have a DC input range of 10-15 VDC (nominal). If the battery
input should fall outside this range, the inverter will shut down to protect the circuitry.
AC Circuit Breaker
e AC output of the WF-5118/5120 Inverters is protected by a resettable circuit breaker (see
Figure 1 below). e WF-5118 and WF-5120 models have a 20A/120 VAC circuit breaker
located on the upper le side of the rear panel.
e breaker may trip in a high current situation. Should a breaker trip, reduce or remove the
connected AC load and reset the circuit breaker. Restart the inverter and check for proper
operation.
Internal Cooling Fan
e WF-5118/5120 Inverters are equipped with 4 DC brushless fans to provide cooling for the
circuitry. Two fans are located on the rear panel and two fans are located on the front panel.
CIRCUIT PROTECTION
WF-8500 Series Fuses and Breakers
Figure 1
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