WFCO WF-5118 User manual
Operator’s Manual
Distributed in the U.S.A. and Canada by
ARTERRA DISTRIBUTION
(877) 294-8997
Warranty: [email protected]m
Fax (574) 294-8698
www.wfcoelectronics.com Power PROs Technical Support
(877) 294-8997
WF-9900 Series
WF-5118 WF-5120
WF-5100 Series True Sine Wave Inverters
( The Inverter model number is located on the label on top of the enclosure)
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GENERAL INFORMATION ...................................................................................................... 3
WF-5118/5120 PRODUCT FEATURES ............................................................................. 4
WF-5118/5120 SAFETY FEATURES ................................................................................. 4
OPERATIONAL FEATURES
Front Panel Interface ..................................................................................................................... 6
Rear Panel Interface ...................................................................................................................... 6
AC Pass-rough Mode .............................................................................................................. 6
Inverter Power Mode ................................................................................................................... 7
Diagnostic Display Panel ............................................................................................................. 7
Remote Switch Pannel .................................................................................................................. 7
TROUBLESHOOTING INSTRUCTIONS
Reverse Polarity Protection .......................................................................................................... 8
DC Voltage Check .......................................................................................................................... 8
Pass-rough ................................................................................................................................. 8
Remote Switch ................................................................................................................................ 8
Remote Switch LEDs ...................................................................................................................... 9
No Generated Power Output ....................................................................................................... 9
Troubleshooting Flow Chart - No Pass-rough .................................................................... 10
Troubleshooting Flow Chart - No Generated Ouptut ............................................................ 11
GENERAL COMPLIANCE INFORMATION
Agency Listings ............................................................................................................................. 12
INSTALLATION INSTRUCTIONS
Mounting the Enclosure ............................................................................................................. 12
AC Ground Bonding ................................................................................................................... 12
Neutral Bonding ........................................................................................................................... 12
AC System Wiring......................................................................................................................... 13
DC Wiring Connections ..............................................................................................................14
Other Connections ....................................................................................................................... 15
SPECIFICATIONS .......................................................................................................................... 16
WARRANTY INFORMATION ................................................................................................... 17
DIMENSIONAL DRAWINGS .................................................................................................... 19
TABLE OF CONTENTS
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!WARNING!
Risk of Electrical Shock. Disconnect or isolate all power supplies before making electrical
connections. More than one disconnection or isolation may be required to completely
de-energize equipment. Contact with components carrying hazardous voltage can cause
electric shock and may result in severe personal injury or death.
!IMPORTANT!
All wiring must conform to local, national, and regional regulations. Use copper conductors only
for all wire connections. Do not exceed the electrical ratings for the WF-5118/5120 Inverters or
the equipment connected to it.
!CAUTION!
is product should be installed by an experienced technician. CAUTION and care must be
taken when servicing this equipment. To prevent severe shock or electrocution, consult your
servicing dealer.
!WARNING!
is unit employs components that can produce arcs or sparks. To prevent re or explosion, do
not install in compartments containing batteries or ammable materials (LP gas). is product
is NOT ignition protected.
!CAUTION!
To prevent re, do not cover or obstruct front cover ventilation openings. For continued
protection against risk of re or electric shock, replace faulty DC fuses and AC breakers
with ones of the same type and ratings as are installed.
!CAUTION!
When using a battery with the WF-5118/5120 Inverters, follow battery maintenance procedures.
Check the uid level in any battery connected to RV charging system on a monthly basis.
GENERAL INFORMATION
e WF-5118/5120 Inverters are standalone power inverters with AC Pass-rough suitable for
use in RV, Marine, and other applications where a True Sine Wave 115 VAC voltage is required.
e WF-5118 inverter will produce 1800 Watts of AC power. e WF-5120 inverter will produce
2000 Watts of AC power.
When 115 VAC utility power is applied to the WF-5118/5120 Inverters through the Shore cord,
115 VAC will pass straight through to the connected load. Should utility power be cut o, the
WF-5118/5120 Inverters automatically switch to invert mode, providing clean 115 VAC to the
connected load. When utility power is reapplied, the WF-5118/5120 switches back to the Pass-
rough mode.
e WF-5118/5120 Inverters require 12 VDC (nominal) input from the house battery to operate
in the inverting mode. For Pass-rough mode, a convenient internal wiring box is located on
the rear panel, along with the hardwire output.
Please read all instructions and cautionary statements in this manual before installation and use
of the WF-5118 and WF-5120 Inverters.
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WF-5118/5120 INVERTER PRODUCT FEATURES
• Advanced Microprocessor Control Circuit Design
• High-Frequency Switching Mode Power Topology
• THD < 3%; Pure Sine-Wave Output Waveform
• High Surge Current Walk-In Capability (3:1 Crest Factor)
• High Overload Capability
• Rear Panel Mounted Resettable Circuit Breaker
• ± 3% Regulated AC Output Voltage
• Better than 80% System Eciency
• Automatic Utility Bypass Transfer Switch
• LED Status Display with Level Indication of Battery & Load
• Output Overload and Short-Circuit Protection
• Over Temperature Protection
• Over/Under DC Input Voltage Protection
• Battery Input Reverse Polarity Protection
• Two-Stage Low Battery Protection
• Remote On/O Control & Status Display Panel with 32-. Cable
• Listings Include UL 458 and FCC Class B
• 2-Year Limited Warranty
WF-5118/5120 INVERTER SAFETY FEATURES
DC Reverse-Polarity Battery Protection
e WF-5118/5120 Inverters are protected from reverse battery connection by fuses located
inside the enclosure. is feature prevents permanent damage to the inverter from a battery
connected into the circuit backwards. Blown reverse polarity fuses are not replaceable by
the user. e fuses are designed to protect RVs from catastrophic damage; once the fuses are
blown, the inverter must be replaced.
Over-Temperature Protection
If the internal temperature of the inverter exceeds a critical point, it will shut down and the Red
Fault LED on the front panel and remote switch will illuminate. is protects the unit from
excessive heat that may damage sensitive components. Remove or reduce the AC load and cycle
the power button to restart the unit.
Electronic Current Limiting
When the WF-5118/5120 Inverter is in the inverting mode, should the AC output current
exceed the maximum rating, the unit will shut down and the Red Fault LED on the front
panel and remote switch will illuminate. If this occurs, remove or reduce the connected load.
Cycle the power button on the front panel to restart the inverter.
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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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OPERATIONAL FEATURES
Front Panel Interface
Rear Panel Interface
Inverter Operation
AC Pass-rough Mode
When incoming AC power or inverter produced power is available, the transfer switch is
designed to pass this voltage straight through to the inverter output. e WF-5118/5120
Inverter power switch does not have to be in the ON position for Pass-rough to work.
is mode will also work with or without a battery attached. NOTE: if the power switch is
in the ON position and incoming power is lost, the WF-5118/5120 Inverter will switch to
invert mode to provide AC voltage to connected loads.
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Figure 3
Figure 2
Inverter Power Mode
When incoming AC power is not available, and the Power Pushbutton is in the ON
position, the inverter will produce AC voltage at the output.
Diagnostic Display Panel
e WF-5118 and WF-5120 Inverters have front panel LEDs to indicate the output load
being supplied, current battery level, and operational mode of the inverter. Both the output
load level and battery level are displayed in four 25% increments, from 25% to 100%.
Percentage 25% 50% 75% 100%
Battery >10.5 VDC >11 VDC >11.7 VDC >12.5 VDC
WF-5118 Load 3.75 A 7.5 A 11.25 A 15.0 A
WF-5120 Load 4.17 A 8.34 A 12.5 A 16.67 A
Remote Switch Panel
e WF-5118/5120 Inverters have a remote switch panel that provide status information and
ON/OFF control of the unit from a remote location. e WF-5118 and WF-5120 remote can
be located up to 32.8’ (10m) away from the main inverter unit. In addition to the ON/OFF
power pushbutton, the faceplate mimics the status LEDs found on the main inverter units
front panel. See the Diagnostic Display Panels section above for a description of the status
LEDs. NOTE: As above, the main inverter unit’s power pushbutton must be in the OFF
position for the remote panel to function.
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Figure 4
Figure 5
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TROUBLESHOOTING INSTRUCTIONS
Troubleshooting the 5118/5120 Inverters
Reverse Polarity Fuses
Check to make sure the DC cables are connected to the proper input lug. e Positive (+) DC
cable MUST be connected to the Red or (+) lug on the back of the inverter. e Negative (-) DC
cable MUST be connected to the Black or (-) lug on the back of the inverter. If these cables are
connected backwards either at the inverter or at the battery, the internal Reverse Polarity fuses
will blow. IMPORTANT: ese fuses protect the inverter from damage in the event that the RV
battery is accidentally connected in reverse. A reversed battery connection, even if for only a
second, will cause these fuses to blow. ese internal fuses are non-replaceable.
Check DC Input Voltage
For proper operation of the inverter, the WF-5118/5120 Inverters require a DC input between
10-15 VDC (nominal). If the battery voltage is below 11.0 volts, a Low Battery symbol will
appear on the center display (see Figure 4). Recharge the battery for continued operation. If the
voltage is above 15 VDC, as can happen with some tow vehicle alternators, the WF-5118/5120
Inverter will shut down to protect the internal circuitry.
Inverter Has No Pass-rough
Check the circuit breaker located on the WF-5118/5120 Inverter’s rear panel. If the breaker is
not tripped, check to make sure the inverter is receiving 115 VAC. NOTE: When the
WF-5118/5120 Inverter is in Pass-rough mode, the Normal (Green) LED on the front panel
will be illuminated to indicate the presence of 115 VAC.
Remote Switch Will Not Turn Inverter ON/OFF
e remote switch will only work if the main Power Pushbutton located on the WF-5118/5120
Inverter’s front panel is in the OFF position. If the remote switch does not turn the inverter ON/
OFF, check the remote switch cable that runs between the rear panel of the inverter to the back
of the remote switch. Make sure the female DB9 connector is fully seated into the male DB9
connector on the rear panel. Tighten the two thumbscrews on either side of the cable connector.
On the opposite end of the cable, make sure the 10-pin single row connector is fully seated into
the back of the remote switch.
If the remote switch will not turn the inverter ON/OFF, replace the remote switch and check for
proper operation. If the remote switch will not work, replace the connecting cable.
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Remote Switch LEDs Do Not Mimic the Front Panel LEDs
e remote switch LEDs should display the same status information that is on the WF-
5118/5120 Inverter front panel. Check the remote switch cable that runs between the rear panel
of the inverter to the back of the remote switch. Make sure the female DB9 connector is fully
seated into the male DB9 connector on the rear panel. Tighten the two thumbscrews on either
side of the cable connector. On the opposite end of the cable, make sure the 10-pin single row
connector is fully seated into the back of the remote switch.
If the remote switch does not display the proper information, replace the remote switch and
check for proper operation. If the remote switch will not work, replace the connecting cable.
Unit Has Pass-rough but Nothing Works (Power Button in ON Position)
Make sure the WF-5118/5120 Inverter’s Power Pushbutton is in the OFF position. Disconnect
the Negative (White) wire from the DC input lugs at the rear panel. Let the unit stand idle for
approximately 5 minutes so the internal circuitry can normalize. Reconnect and securely tighten
the Negative (White) wire. Push the Power Pushbutton to the ON position. e unit should
work normally.
Contact the Arterra Distribution Power PROs at 1 (877) 294-8997.
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GENERAL COMPLIANCE INFORMATION
Agency Listings
UL
e WF-5118/5120 Inverter units are UL-Listed, and cUL-Listed (Canadian).
FCC Compliance Class B
NOTE: is equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to Part 15 of the FCC Rules. ese limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. is 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.
INSTALLATION INSTRUCTIONS
Installing the WF-5118/5120 Inverters
Mounting the Enclosure
e WF-5118/5120 Inverters enclosure should be mounted near the house battery in an
accessible area such as a wall or in the side of a cabinet. e front of the enclosure should not
be obstructed to allow free air ow for the cooling fans and to allow access to the front panel
controls. e WF-5118 and WF-5120 enclosures need a mounting area of 16.2”L x 10.8”W x
6.65”H.
AC Ground Bonding
During AC wiring installation, the AC input and output grounds are connected to the inverter.
e AC input ground wire must be connected to the incoming ground wire of the AC utility
source. e AC output ground wire should be connected to the grounding point for your loads;
for example, a distribution panel ground bar.
Neutral Grounding
e neutral conductor of the AC output circuit of the inverter is automatically connected to the safety
ground during inverter operation. is conforms to National Electrical Code requirements that a
derived AC source, such as an inverter or generator, must have their neutral conductors tied to
ground in the same way that the neutral conductor from the utility is tied to ground at the AC
breaker panel. When AC utility power is present and the inverter is in bypass mode, this neutral
to ground connection is not present. e utility power neutral is only connected to ground at the
breaker panel.
AC System Wiring
e AC Pass-rough and AC output wiring location is on the lower le side of the rear
panel. Both input and output connections should be made at the same time. Connections to
the WF-5118 Inverter should be made using 12 AWG Romex wire. Connections to the WF-
5120 Inverter must be made using 10 AWG Romex wire.
Begin cable installation by backing out the knurled screw on the wiring inspection panel.
Remove and set aside the screws that hold the AC input and AC output cable connectors in
place. Remove the clamp plates. Open the clamps by backing out the clamp screws to widen
the opening.
Making AC Input (Pass-rough) Connections on the WF-5118 Inverter
1. Insert approximately 4” of one end of a 12 AWG Romex wire through the clamp on the
AC input plate and tighten the clamp screws to secure the cable. e other end of this
cable attaches to a circuit breaker in the power panel.
2. Remove approximately 3 ½” of outer sheathing from the wire.
3. Separate the wires and strip ¾” of insulation from the White and Black wires.
4. Locate the AC input wires inside the WF-5118 Inverter wiring box. Connect the Romex
wires to the inverter output wires using listed wiring connectors. Wire Black to Black,
White to White, and Ground to Green. Make sure connections are secure.
5. Fold the connected wires back into the wiring box.
6. Reattach the clamp plate to the inverter and secure with the screw.
Making AC Output Connections on the WF-5118 Inverter
1. Insert approximately 4” of one end of a 12 AWG Romex wire through the clamp on the
AC output plate and tighten the clamp screws to secure the cable. e opposite end of
this cable attaches to the load circuit.
2. Remove approximately 3 ½” of outer sheathing from the wire.
3. Separate the wires and strip ¾” of insulation from the White and Black wires.
4. Locate the AC output wires inside the WF-5118 Inverter wiring box. Connect the Romex
wires to the inverter output wires using listed wiring connectors. Wire Black to Black,
White to White, and Ground to Green. Make sure connections are secure.
5. Fold the connected wires back into the wiring box.
6. Reattach the clamp plate to the inverter and secure with the screw.
Push all the wires back into the wiring box and fasten the inspection plate back in place with
the knurled screw.
Making AC Connections on the WF-5120 Inverter
To make AC input/output connections on the WF-5120 Inverter, follow steps 1 through 6
above, but use 10 AWG wire in place of the 12 AWG wire.
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DC Wiring Connections
A fuse is required by the National Electrical Code (NEC) to protect the battery and cables. A
UL listed 250 Amp DC rated slow blow fuse or circuit breaker must be installed in the Positive
battery cable within 18 inches of the battery.
e DC connecting cables should be made of copper wire. To achieve maximum battery
voltage at the WF-5118/5120 Inverter terminals, keep the cable lengths as short as possible.
e WF-5118/5120 require 2/0 AWG wires for DC connections.
If not already available, prepare a Red Positive 2/0 AWG battery cable by stripping back ½” of
insulation and crimping on a 3/8” ring terminal. In a similar fashion, prepare a Black Negative
battery cable.
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Figure 6
Figure 7
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+12 VDC Input
Using a 14mm wrench, remove one of the two Positive (Red) lug nuts from the Red DC
power block on the inverter’s rear panel. Route the Red Positive battery cable through the
Red exible lug insulator and attach it to the Positive battery lug on the inverter. Torque
this lug to 45 in-lbs. NOTE: Using the proper torque to secure this connection is
important. A loose connection can cause inverter performance issues and may lead to
excessive heat build-up and damage to the unit. Slip the insulator over the lug ends and
press to secure in place.
DC Negative Input
Using a 14mm wrench, remove one of the two Negative (Black) lug nuts from the
Black DC power block on the inverter’s rear panel. Route the Black Negative battery
cable through the Black exible lug insulator and attach it to the Negative battery lug
on the inverter. Torque this lug to 45 in-lbs. NOTE: Using the proper torque to secure
this connection is important. A loose connection can cause inverter performance issues
and may lead to excessive heat build-up and damage to the unit. Slip the insulator over
the lug ends and press to secure in place.
Other Connections
Chassis Ground
Using a 5/32” hex wrench, loosen the Ground lug screw located on the mid le side of the rear
panel. Insert an 8AWG copper wire from this lug to chassis ground. Tighten the lug securely.
Remote Switch Cable
e Remote switch is an optional device that is included with the WF-5118 and WF-5120
Inverters. If remote operation of the WF-5118/5120 Inverter is desired, mount the Remote
switch within 32.8’ of the inverters rear panel. Using a 2 ¼” hole saw, make a cutout in the
cabinet or wall where the switch is to be located.
Using the supplied connecting cable, attach the DB9 connector to the DB9 connector on the
right side of the inverter’s rear panel. Route the cable through the RV to the Remote switch
mounting location. Plug the 10-position single row connector into the back of the Remote
switch. Attach the switch to the cabinet or wall with 4 screws (not supplied).
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SPECIFICATIONS
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CONSUMER LIMITED WARRANTY
for WFCO Electronic Products
WFCO extends, to the original owner, a Two Year Limited Product Warranty. is warranty is
in eect from the date of original purchase for a period of two (2) years. is limited warranty
is extended specically 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 work-
manship under normal use and service based on its intended use and function. is war-
ranty 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 specied by each individual state.
EXCLUSIONS and LIMITATIONS
e OEM warranty specically 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 to 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.
Specications 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 oered by Arterra
Distribution / WFCO.
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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. e RGA number can be requested by completing the Warranty
Information Fax Sheet and appropriate Troubleshooting Form found at www.wfcoelectronics.
com. Once these forms have been completed, email the forms along with Proof of Purchase
(574) 294-8698. Aer receipt of the forms, an RGA number will be issued. is number shall
appear on all correspondence with warranty service. Upon validation of the warranty, WFCO
shall replace the product with a like product. e RGA number shall be placed on the outside
of the carton used to return the product for ease of identication. Do not mark directly on
the product. e product must be packaged properly to avoid further product damage which
could cause a non-warrantable condition.
WARRANTY ASSISTANCE
e consumer may contact the selling Dealer or OEM for warranty assistance.
e consumer may also contact Arterra Distribution, at: (574) 294-8997 or
Fax (574) 294-8698.
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DIMENSIONAL DRAWING
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WFCOELECTRONICS.COM
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