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GENERAL INFORMATION
WF-8900MBA Series Main Board Assembly Safety Features

 

Automatic Cooling Fan

The cooling fan in the WF-8900 Series Power Center is incremental 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. 

Summary of Contents for WF-8900MBA Series

Page 1: ... 8997 Warranty warranty wfcoelectronics com Fax 574 294 8698 www wfcoelectronics com Power PROs Technical Support 877 294 8997 WF 8900MBA Series WF 8935MBA WF 8945MBA WF 8955MBA WF 8965MBA WF 8975MBA The Power Center model number is located on the front panel label next to the breakers ...

Page 2: ...ION Reverse Battery Protection 4 OPERATIONAL FEATURES Three Stage Smart Charging 5 TROUBLESHOOTING INSTRUCTIONS Converter Output Voltage 6 Reverse Polarity Fuses 6 Troubleshooting Flow Chart 7 Replacing the MBA 7 GENERAL COMPLIANCE INFORMATION Agency Listings 9 INSTALLATION INSTRUCTIONS Mounting the MBA 9 WARRANTY INFORMATION 10 SPECIFICATIONS 11 TABLE OF C ONTENTS 2 ...

Page 3: ...al 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 ...

Page 4: ...he WF 8900MBA Series Main Board Assembly will charge the 12 volt House battery if installed A battery DOES NOT have to be installed for WF 8900MBA Series Main Board Assembly to oper ate When a battery is installed two reverse polarity fuses protect the MBA circuitry The fuses are located along the left center edge of the DC fuse board below the VCC lug Refer to Figure 1 below This feature prevents...

Page 5: ...y to hold the converter s maxi mum output current level the amperage rating without exceeding it If the output current reaches its maximum normally caused by a discharged battery this will cause the converter to go into Bulk Mode which means the target output voltage will change to 14 4 volts and a timer will start Although the converter is outputting 14 4 volts you will not be able to read that o...

Page 6: ... 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 Reverse Polarity Fuses If there is no DC output coming from the WF 8900MBA Series Main Board Assembly converter secti...

Page 7: ...t the WF 8900MBA Series Main Board Assembly needs to be replaced removal of the Main Board Assembly Is a simple process Replacing the Converter Section MBA Make sure no AC power is coming into the RV from either the Shore Power cord or an on board generator Remove and set aside the Reverse Polarity Fuses located on the fuse board to disconnect the converter section from the rest of the RV s DC pow...

Page 8: ...the lower section As an extra precaution MAKE SURE THE CONVERTER BREAKER IS IN THE OFF POSITION Remove the wire from the breaker NOTE this wire has a metal pin terminal on the end inserted into the breaker Remove and position out of the way any wire connected to the pigtail 6 Locate and remove the converter s Green Ground wire attached to the AC Ground bar on the left side of the compartment In a ...

Page 9: ... 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 Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense INS...

Page 10: ...ot limited to inconvenience loss of service loss of revenue loss or damage to personal property cost of all services performed in removing or replacing the WFCO product Specifications are subject to change without notice or obligation Any WFCO Electronics products sold through unauthorized Internet sources Example eBay will be excluded from all warranty coverage offered by Arterra Distribution WFC...

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Page 12: ...W F C O E L E C T R O N I C S C O M ...

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