K2
Capacity 700 lb, 30 ft
Use Residential only (UL Class 1)
Motor DC, equivalent to 1/3 HP AC
Speed 12 in per second
Manufacturer warranty 5 years
Built-in heater, battery backup, Smart Positioning System, solar option.
Viking Gate Operators: Repair, Boards & Diagnostics
Viking Access Systems is a FAAC International company. Their operators are common on South Florida driveways and commercial entries, and most of the DC line runs the same control board, which means a Viking that stops working can usually tell you what is wrong before anyone takes a cover off.
We repair Viking operators, replace V-Flex boards, and diagnose the faults that read as a dead gate but are not.
Gate Core Automation is an independent service company. We are not affiliated with, authorized by, or endorsed by Viking Access Systems or FAAC International.
Call Now: 954-310-6669Slide Operators
L3
Capacity 1,600 lb, 60 ft
Use Residential and commercial
Motor DC, equivalent to 1/2 HP AC
Speed 12 in per second
Manufacturer warranty 5 years
Removable power box for low-voltage wiring, multi-layer corrosion protection, can be raised on a post, built-in heater, battery backup, Smart Positioning System.
H10
Capacity 2,200 lb, 75 ft
Use Residential and high-traffic commercial
Motor True 1 HP DC
Speed 12 in per second
Manufacturer warranty 5 years
Removable power box for low-voltage wiring, multi-layer corrosion protection, can be raised on a post, built-in heater, battery backup, Smart Positioning System.
Smart Positioning System (SPS): the K2SPS, L3SPS and H10SPS read absolute gate position at any instant regardless of electrical power, through sensors and a gearbox mechanism on the main drive. No re-learn cycle after an outage.
The K2 and L3 run the standard V-Flex board. The H10 takes its own version with an -H10 suffix. They are not interchangeable.
Every Viking operator on this page is rated to run from -20F up to 160F, except the I770, which is rated to 131F.
Swing Operators
G5
Capacity 2,000 lb at 10 ft, or 800 lb at 18 ft
Use Residential and commercial
Motor DC, equivalent to 1/2 HP AC
Speed 15 to 18 seconds per 90 degrees
Manufacturer warranty 3 years
Linear arm, 100% duty cycle, electronic manual release, solar option.
T21
Capacity 2,000 lb at 12 ft, or 1,200 lb at 20 ft
Use Residential and commercial
Motor DC, equivalent to 1 HP AC
Speed 13 to 16 seconds per 90 degrees
Manufacturer warranty 5 years
1/4 inch steel chassis, multi-layer corrosion protection, built-in heater with thermostat, battery backup, smooth start and stop.
F1
Capacity 1,500 lb at 12 ft, or 1,000 lb at 16 ft
Use Residential and commercial
Motor DC, equivalent to 1/2 HP AC
Speed 13 to 16 seconds per 90 degrees
Manufacturer warranty 5 years
1/4 inch steel chassis, multi-layer corrosion protection, removable power box for low-voltage wiring, built-in heater, battery backup, soft start and soft stop.
R6
Capacity 700 lb, 14 ft
Use Residential
Motor DC, equivalent to 1/3 HP AC
Speed 13 to 16 seconds per 90 degrees
Manufacturer warranty 5 years
Built-in heater, up to 400 cycles on battery backup, solar option.
E4
Capacity 850 lb at 10 ft, or 550 lb at 16 ft
Use Residential
Motor DC, equivalent to 1/3 HP AC
Speed 12 to 16 seconds per 90 degrees
Manufacturer warranty 3 years
Linear arm, manual release handle, one control board runs a single or dual gate, ready for low-voltage wiring.
X390
Capacity 600 lb, 14 ft
Use Residential and commercial
Motor DC, equivalent to 1/2 HP AC
Speed 10 to 13 seconds per 90 degrees
Manufacturer warranty 3 years
Column mount, built-in heater, up to 400 cycles on battery backup.
I770
Capacity 650 lb, 12 ft
Use Underground, residential
Speed 13 to 15 seconds per 90 degrees
Manufacturer warranty 3 years
IP67 water resistant, 100% duty cycle, 250 cycles on battery backup, manual release, operating range -20F to 131F, ETL listed, UL 325 and UL 991 compliant.
Viking's published manufacturer warranty runs from the invoice date: 5 years on its pad-mount operators and 3 years on its other gate operators. Viking warrants its operators to the dealer that sold them, so warranty claims go through the selling dealer. Lightning and power surge damage are excluded.
Specifications and manufacturer warranty terms on this page are taken from Viking's published information as of September 2026 and may change without notice. Confirm current specifications and warranty terms with the manufacturer or your dealer. Gate Core Automation is not responsible for errors in, or changes to, manufacturer information.
The V-Flex Board
The V-Flex is the central controller for most Viking DC operators. It has an on-board LCD display and a Diagnose button that scrolls through fault messages, which is the reason a Viking usually tells you what failed before anything gets opened.
The logo colour dates the board:
- VFLEXPCB, black logo: 2013 to 2016
- VFLEXPCBU16, green logo: 2016 to 2018
- VFLEXPCBU18, orange logo: 2018 to present
All three fit the same operators. The current orange generation improves on the legacy boards in safety logic, LCD messaging and UL 325 compliance.
Coverage: R6, F1, K2, L3, G5, T21, X390 and I770 run the standard board. The H10 takes a suffixed version.
Surge protection: the V-Flex is rated to 20,000 volts and 10,000 amps. Because that sits on the board, any Viking DC operator running a V-Flex has it. It covers the power input. Buried low-voltage lines feeding loops, photo eyes and keypads are a separate path in, and that layer is the one that usually gets skipped.
Dual gate needs a slave: either the Viking Konnect wireless kit for two single operators, or the VFLEXSMU18 slave module with the VECUMSC comm cable and VECUSPH secondary power harness.
Viking Monitor (VA-18) gives remote access to board settings, diagnostics, controls, gate status and error notifications from a computer or handheld device.
Viking Work We Have Done
Boca Raton
Viking X390 in Boca Raton: UL light stuck on, gate dragging on the ground
A west Boca Raton swing gate had sagged into the ground and the Viking X390 hadn't run in years. The UL light never went off. Here is how a new board saved a six-year-old motor kit.
Read more →
Boca Raton
Viking G5 in Royal Palm Yacht & Country Club: Fifteen Years on the Coast and the Limits Were Gone
Gate stuck open and refusing to close? A fifteen year old Viking G5 in Boca Raton had lost its limit switches to corrosion. Call 954-310-6669.
Read more →
Wellington
Viking K2S Control Board Replacement in Wellington: Fixing a Gate That Stopped After Two Feet
A Wellington sliding gate that stopped after two feet with an EPS2 error: how we diagnosed the Viking K2S board, re-railed the gate, and got it running. Call 954-310-6669.
Read more →What a Viking Is Telling You
What we check first. The board light, then the accessories. A Viking that looks dead is usually a Viking that has been told to stop by something plugged into it, so the accessories get diagnosed before anything gets blamed on the motor or the board.
The gate is completely dead, but the board has power.
At least one monitored 10K resistor-based safety sensor has to be connected or a Viking will not run. Put a non-compatible sensor on it and the operator refuses to move. It reads exactly like a failed motor or a dead board, and it is neither. Tested compatible Miller Edge models: ME110-T2, ME120-T2, MGR20-T2, MGS20-T2.
Something is wrong but nobody knows what.
Press the Diagnose button on the V-Flex and the LCD scrolls the fault messages. Most Viking calls start here, and a lot of them end here too.
One leaf moves, the other does not.
A dual-gate setup needs a slave, either the Konnect wireless kit or the VFLEXSMU18 module with its comm cable and secondary power harness. If the slave side lost its link or its harness, one leaf goes quiet.
The gate lost its position after a power outage.
On an SPS model it should not, since those read absolute position without power. On a non-SPS operator, a lost position after an outage is normal behaviour, not a fault.
A safety device is reversing at the wrong moment.
Open direction has to be set correctly. Set wrong, the auto-close timer fires at the wrong point in the cycle and a safety device can end up pointing at the area it was meant to protect.
Repair or Replace
There is no blanket answer on a Viking, and anyone who gives you one without looking is guessing. What actually decides it:
Which board generation you are on. A black-logo board is a decade old. A board swap on a unit that age buys you a different amount of time than the same swap on an orange-logo unit.
Whether the operator is right for the gate it is on. A K2 is rated to 700 lb. If it has been pushing more than that for years, the board is not the problem and replacing it will not last.
Whether the fault is electronic or mechanical. A board fault, a sensor fault or a harness fault is a repair. Worn drive components on an operator that has been overloaded is a different conversation.
Manufacturer warranty status, per model. Pad-mount operators carry 5 years from invoice, the G5, E4, X390 and I770 carry 3, and claims go through the selling dealer. It gets checked per unit rather than assumed.
We tell you which one you are looking at before any work starts.
Viking operator down in Broward or Palm Beach?
Call us and we will find out what failed.Gate motor repairSliding gate repairSwing gate repair
954-310-6669