WFCO WF-7910 Series User manual

OPERATOR’S MANUAL
WF-7910 SERIES 12V POWER CONVERTER ACCESSORY
WF-7910 | WF-7910-Q | WF-7910-WAGO
The Power Converter Accessory model number is located inside the door panel.
ARTERRA DISTRIBUTION
[phone]
wfcoelectronics.com
WARRANTY
[email protected]
Fax [phone]
Distributed by Arterra in the U.S.A. and Canada

2
SAFETY INFORMATION ...................................................................................................... 1
GENERAL INFORMATION
Reverse Battery Protection..................................................................................................... 1
Blown Fuse Indicators............................................................................................................. 1
CIRCUIT PROTECTION
DC Fuses.................................................................................................................................. 2
INSTALLATION INSTRUCTIONS
Mounting the Enclosure......................................................................................................... 2
Wiring the DC Fuse Board..................................................................................................... 3
TROUBLESHOOTING INSTRUCTIONS
Check Converter or Battery Input Voltage........................................................................4-5
Blown Fuse Indicators............................................................................................................. 5
GENERAL COMPLIANCE INFORMATION
Agency Listings ....................................................................................................................... 6
CONSUMER LIMITED WARRANTY...................................................................................... 6
CONSUMER WARRANTY CLAIM PROCEDURE................................................................. 7
WARRANTY ASSISTANCE ..................................................................................................... 7
TABLE OF CONTENTS

1
REVERSE BATTERY PROTECTION
The WF-7910 Series 12V Power Converter Accessory DOES NOT have a converter installed within
the enclosure. Power is supplied to the WF-7910 Series 12V Power Converter Accessory from an
external converter/charger, WF-9800 Series Converter/Charger for example, located elsewhere in
the RV. Reverse Battery Protection will be provided by that unit. Consult that converter/charger’s
manual for location and replacement instructions.
BLOWN FUSE INDICATORS ON DC FUSE BOARD
The DC Fuse Board has individual blown fuse indicators as standard equipment. The WF-7910
and WF-7910-Q 12V Power Converter Accessory has 20 DC circuits and the WF-7910-WAGO 12V
Power Converter Accessory has 17 DC circuits. Each of the circuits contain a Red LED to
indicate a blown fuse. If one of the circuits draws more current than the rating of the fuse, the
fuse will blow. When this occurs, the Red LED for that circuit will illuminate. NOTE: The fuse
board employs surface mount LEDs which are barely visible to the naked eye. Replace the blown
fuse with a known good fuse of the same rating. NOTE: If the replacement fuse blows again,
check that circuit for a short or overload condition.
NOTICE
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GENERAL INFORMATION
WF-7910 Series 12V Power Converter Accessory Safety Features
CAUTION
INST ALLA TI O N A N D SERVICING
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2
CIRCUIT PROTECTION
WF-7910 Series 12V Power Converter Accessory Fuses
DC FUSES (12 VOLTS)
Should any fuse blow, the fuse should be replaced with ATC or ATO
automotive type fuse such as:
• Littelfuse type 257
• Bussmann type ATC
INSTALLATION INSTRUCTIONS
Installing the WF-7910 Series Power Converter Accessory
MOUNTING THE ENCLOSURE
The WF-7910 Series 12V Power Converter Accessory enclosure should be mounted in an
accessible area such as a wall or inside a cabinet and close to the battery (batteries) when
possible. Select a mounting location that is appropriate to prevent excessive heat, water,
moisture, dust, and dirt entering the unit once installed.
Cut an opening 1/8” wider than the enclosure to allow the Power Converter Accessory to slide
in easily. The rough opening is 12 3/16” W x 8 3/16” H. The enclosure is 2-3/8” deep. Be sure to
allow enough space behind the unit for wiring. After wiring is completed, the enclosure fastens to
the wall or cabinet using 4 wood screws (not supplied).
Optional 12V NEG Reference

3
WIRING THE DC FUSE BOARD
Make sure the converter/charger is OFF and the house battery is disconnected before
beginning the DC wiring. Determine what DC loads are to be connected to the fuse board and
what position they will occupy. For the WF-7910 and WF-7910-Q models, any of the fuse circuits
can be used for slide-outs or other higher current loads and can have a maximum 30 Amp ATO
or ATC fuse installed. As for the WF-7910-WAGO model, there are 3 available circuits that can be
used for slide-outs or other higher current loads and can have a maximum 30 Amp ATO or ATC
fuse installed, while the remaining 14 circuits are general purpose and can have up to a 20 Amp
ATO or ATC fuse installed. Make sure the fuses are seated properly.
NOTE: Fused circuit loads shall not exceed the maximum circuit board rating of 160Amps DC.
For all models having lug screw connections, strip approximately 1/4” of insulation from the DC
load wires and insert the wire into the appropriate lug. Tighten the lug screw to the torque spec
found in the table below. Make sure all connections are tightly secured.
NOTE: DC power coming to the WF-7910 Series 12V Power Converter Accessory needs to have
the correct size fuse (160A maximum) for the gauge of wire and could be routed in one of
two ways.
1. Power could be coming directly into the WF-7910 Series 12V Power Converter Accessory
fuse board from the converter/charger. The battery (if supplied) would also connect to the
fuse board.
2. Power from the converter charger would be connected directly to the battery. A cable from
the battery would be connected to the fuse boards input lugs.
WE’LL USE THE FIRST CONNECTION METHOD IN OUR DISCUSSION BELOW
Connect the heavy Positive wire coming from the converter/charger to one of the POS+ larger
lugs of the fuse board. In a similar fashion, connect the heavy Negative wire from the converter/
charger to the NEG- buss bar mounted on back up to 4 AWG. Make sure the lugs are tightened
to the specs in the torque chart located on the inside of the door assembly. Connect the battery
Positive cable to the remaining POS+ large lug making sure it is torqued properly. The Negative
battery lead will be connected to the buss bar mounted on back up to 4 AWG.
As a last step, any DC negative leads should be connected to the rear Negative bus bar located
on the back of the panel.
Terminal Description Max Temperature (°C) Torque - (in.-lbs.) Wire Gauges - (AWG)
Terminal Bars - 90 25 10-14 AWG Wire
Neutral 30 8 AWG Wire
35 6 AWG Wire
40 4 AWG Wire
DC Fuse Panel Lugs -
75
25 10 AWG Wire
POS+ 32 8 AWG Wire
45 6 AWG Wire
50 2-4 AWG Wire
DC -
75
15 14-16 AWG Wire
Single Circuit Terminals 20 12 AWG Wire
Optional 12 NEG Reference 25 10 AWG Wire

4
FIGURE 2
BACK VIEW SIDE VIEW
Dimensions are in inches.
TROUBLESHOOTING INSTRUCTIONS
Troubleshooting the WF-7910 Series Power Converter Accessory
Because the WF-7910 Series 12V Power Converter Accessory does not contain a converter/
charger, troubleshooting will be limited to checking DC power coming into the unit and proper
fuse board operation. See (gure 1) on page 4.
CHECK FOR CONVERTER OR BATTERY INPUT VOLTAGE
NOTE: Depending on how the RV manufacturer connected the DC power to the WF-7910 Series
12V Power Converter Accessory, it could have been routed in one of 2 ways.
1. Power could be coming directly into the WF-7910 Series 12V Power Converter Accessory
fuse board from the converter/charger. The battery (if supplied) would also connect to the
fuse board.
2. Power from the converter charger would be connected directly to the battery. And cables
from the battery would be connected to the fuse board input lugs.

5
WE’LL USE THE FIRST CONNECTION METHOD IN OUR DISCUSSION BELOW
Make sure the WF-7910 Series 12V Power Converter Accessory is receiving DC power from the
converter/charger or battery. First, check that the converter/charger is plugged into an AC source
(105-130 VAC) and is operating. Check the converter input voltage with a voltmeter. Be sure you
have good cable connections at the lugs. Place the meter probes on the lugs as follows; place
the Positive (red) meter probe on the larger battery/converter + POS lug and place the Negative
(black) meter probe on the NEG- lug buss bar.
If the voltage from the converter charger reads approximately 13.6 VDC (+/- 0.2) at the lugs,
the fuse board is getting DC power.
If no converter/charger/battery input voltage is read at these lugs, check for an open inline fuse,
or disconnect switch in circuit coming to the fuse board. One may have been installed by the RV
manufacturer. Also check for any other loose wiring connections.
BLOWN FUSE INDICATORS ON DC FUSE BOARD
The DC Fuse Board has individual blown fuse indicators as standard equipment. Each circuit has
a Red LED to indicate a blown fuse. NOTE: The fuse board employs surface mount LEDs which
are barely visible to the naked eye. If one of the Red LEDs is illuminated, check for a blown fuse.
If blown, replace the fuse with a known good fuse of the same rating. NOTE: If the replacement
fuse blows again, check that circuit for a short or overload condition.
If, for some reason, one of the fuse board output circuits is connected to a load that has a switch
that is turned OFF or an appliance that is turned OFF, the indicator LED will not illuminate even if
the fuse is blown or removed from the fuse board. Turn the switch or appliance ON and re-check
the fuse circuit with the fuse removed. If the LED remains OFF, check for a broken wire to the
switch or appliance.
If an indicator LED remains illuminated with the known good fuse in place, check for possible
damage to the fuse board at that location. If damage is found, the fuse board will need to
be replaced.
If the above checks have been made but the problem cannot be resolved, contact the Arterra
Distribution Power PROs at 1 [phone]. Before placing the call, please have available the
WF-7910 Series Power Converter Accessory model number from the front panel label and the
14-digit serial number from the bar code tag located inside the enclosure.
Should it be determined that the fuse board of the WF-7910 Series 12V Power Converter
Accessory is defective, and the unit is still under warranty, please return the complete
WF-7910 Series 12V Power Converter Accessory.
The DC wires protruding from the back of the WF-7910 Series 12V Power Converter Accessory
have been connected to the DC circuits in your RV by the RV manufacturer. When preparing the
fuse board for return, label and disconnect each wire as it is removed from the fuse board lug.
Follow the packaging instructions in your warranty claim packet.

6
GENERAL COMPLIANCE INFORMATION
Agency Listings
UL
The WF-7910 Series 12V Power Converter Accessorys are UL-Listed, and cUL-Listed (Canadian).
CONSUMER LIMITED WARRANTY
for WFCO Electronic Products
WFCO extends, to the original owner, a Two-Year Limited Product Warranty. This warranty is in
effect from the date of original purchase for a period of two years. This limited warranty is
extended specically for and is limited to Recreational Vehicle application and is only valid within
the continental United States, Alaska, Hawaii, and the Provinces of Canada. WFCO warrants,
to the owner, that its products are free from defects in material and workmanship under normal
use and service based on its intended use and function. This warranty is limited to the repair or
replacement, at WFCO’s discretion, of any defective parts or defective assembly. Any implied
warranties of merchantability or tness for intended use are limited in duration unless applicable
State Law provides otherwise. You may have other rights as specied by each individual state.
EXCLUSIONS AND LIMITATIONS
The OEM warranty specically does not apply to the following:
• Any WFCO product that has been repaired or altered by an unauthorized person.
• Any damage caused by misuse, faulty installation, testing, negligence, accident or any
WFCO product installed in a commercial vehicle.
• Any WFCO product, whose serial number has been defaced, altered, or removed.
• Any WFCO product, whose installation has not been in accordance with the WFCO
written instructions.
• Any consequential damages arising from the loss of use of the product including but not
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. Specications 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 / WFCO.

7
CONSUMER WARRANTY CLAIM PROCEDURE
Upon determination and validation by an authorized OEM dealer that a WFCO product has a
defect, a Return Goods Authorization (RGA) number will be required before the product can be
returned. The RGA number can be requested by completing the Warranty Information Fax Sheet
and appropriate Troubleshooting Form found atwfcoelectronics.com. Once these forms have
been completed, email the forms along with Proof of Purchase to [email protected]
or fax the three documents to the Warranty Department at [phone]. After receipt of the
forms, an RGA number will be issued. This number shall appear on all correspondence with
warranty service. Upon validation of the warranty, WFCO shall replace the product with a like
product. The RGA number shall be placed on the outside of the carton used to return the
product for ease of identication. Do not mark directly on the product. The product must
be packaged properly to avoid further product damage which could cause a
non-warrantable condition.
WARRANTY ASSISTANCE
The consumer may contact the selling Dealer or OEM for warranty assistance. The consumer may
also contact Arterra Distribution, exclusive distributor of WFCO Products at: [phone]
or Fax [phone].

ARTERRA DISTRIBUTION
[phone]
wfcoelectronics.com
WARRANTY
[email protected]
Fax [phone]
Distributed by Arterra in the U.S.A. and Canada
Power PROs Technical Support
[phone]