Gate motor PC board repairs

The PC board, also called the control board, controller or control card, is the motor's brain. It reads the remotes through its receiver, knows where the gate is from the limit sensors, watches the safety beams, senses collisions, runs the motor at the right speed and slows it at each end, and on most modern motors charges and watches the battery too.

Because it does so much, nearly every fault ends up showing on the board: a light flashing, a beep, an error on a display. That doesn't mean the board is to blame. It is usually reporting a problem somewhere else.

Centurion's own diagnostic guide for the D2 Turbo shows how wide the field is. For a gate that runs a short distance and stops, it lists a low battery, repeated collisions, collision sensing set too sensitive, the motor assembly and a disconnected position sensor, and a faulty controller only as one cause among them.

Before a board is condemned, we check:

• The power. Mains at the isolator, the power supply or charger, and the battery under load. Centurion builds its power supplies separately from the controllers and asks for their fuses to be checked first when a motor misbehaves.
• The fuses on the motor, light and charger circuits.
• The wiring. A loose battery lead can arc and corrode the terminals, and a stray strand can short against its neighbour.
• The beams and limit sensors, which can stop a gate dead while the board is fine.
• The gate itself, because a stiff or dragging gate looks to the board like a collision.

If all of that is sound and the board still won't behave, then it's the board.

• Lightning. A strike nearby can travel in on the mains, the intercom cable, the beams or the electric fence, and a board is the most sensitive part in its path.
• Surges when the power returns after load shedding, worst where the earthing is missing or corroded.
• A gate shorting to the electric fence, which puts fence pulses where the board never expected them.
• Ants. They nest in the warm, dry housing, and their nests bridge the board's tracks. ET's manual lists ant infestation beside lightning and water among the damage its cover doesn't include.
• Water, through a cable entry that was never sealed.
• Wrong or high voltage. ET's Drive 500/600 card warns when its supply voltage is too high, because that can damage the motor drive circuitry.

Centurion builds surge protection into its controllers, and is careful to say it reduces the chance of damage rather than ruling it out. The protection only works if it has somewhere to send the surge: Centurion's manuals route it to earth through the mains earth and an earth spike next to the motor, and say proper earthing is essential, with the controller and the charger both earthed. For further protection, the D-series SMART+ manual adds an earth spike at the motor, and recommends steel wire armoured cable, whose armour screens the cable against lightning.

So when we replace a board that was killed by a surge, we look at why. A missing or corroded earth spike, an unearthed charger or an unprotected cable run means the next storm is likely to do the same thing again. The mains supply itself is a job for a registered electrician.

If lightning took out the board, check your home insurance before you pay for the repair: lightning is one of the storm perils household policies commonly cover, though what's covered depends on your policy. OneCompare's guide to storm damage insurance claims explains how those claims work. This is general information, not insurance advice.

Some boards are repaired rather than replaced. ET's Drive 500/600 manual, for one, tells installers to bring the control card in for repair when its diagnostics show a failed charger component, corrupted memory, or radio or processor errors that keep coming back. Other faults are on the board but not in it: a burnt connector, a corroded terminal or an ant nest, which are cleaned or remade on site.

When the board itself has failed, replacing it is usually the practical route. Then it's set up for your gate: the limits, the collision sensitivity, the modes you had, and your remotes learnt in again. A board that has been replaced without that setting-up isn't finished.

The bigger question comes on an older motor. If the board costs a large share of a new motor, and the gearbox or motor is also worn, a new motor may be the better buy: see repair or replace a gate motor.

Centurion's classic D3 and D5 use the CP80 controller. The D5-Evo and the D10 have a logic controller with a backlit LCD screen and a NOVA receiver built in. On the D5-Evo, the battery charger is a separate unit, so a D5-Evo that won't charge may need a charger rather than a controller. The SMART and SMART+ models have their own controllers again, set up from a phone with Centurion's MyCentsys Pro app. A board from one family doesn't drop into another, so we match the part to the model on the motor's label. Manuals for each are on our Centurion manuals page.

ET uses one control card across the Drive 500 and Drive 600, whatever the input voltage, with an LCD display and keys for setting up and diagnostics. The card shows its own serial number, firmware and hardware version, and its diagnostics name the faults that need it back on the bench. ET's error messages are explained on our Drive 500 error codes page.

Gemini's 12 V DC slider has used two generations of PCB, the V81 and the V90. Gemini's manual notes that its SEL sliders can be upgraded to a SMART motor by swapping the V81 for a V90 and adding the GEMLINK device, which connects by Bluetooth and Wi-Fi. So a failed V81 is also a chance to decide whether you want the app. See our Gemini manuals.

DTS and Hansa boards we repair and replace too, but we don't hold their makers' manuals, so we don't publish model details for them. With older motors, the question is whether a board can still be found; we tell you once we've seen the label.

Typical market figures, not ours:

• Control board replaced, fitted: R1 500–R4 000 (Kandua)
• Boards in shops: Gemini DC slider about R1 050 (Takealot); Centurion D5-Evo R1 550–R1 880 (Takealot, NeonSales); D10 and D6/D10/D20 SMART+ about R1 970–R2 000 (NeonSales); D2 Turbo about R2 280 (Takealot)

For comparison, new motors alone, before fitting, sell in shops for: Centurion D3 SMART+ about R4 400 (Takealot); D5-Evo SMART+ about R6 000 (Takealot); ET Drive 500 about R5 000 (Takealot). Board prices vary a lot by make, and some older boards aren't listed at all, so they're priced once we know the part. Prices checked October 2026. Your exact price is set in a free quote before any work starts. No call-out fee when we do the work. If no work is done, a R650 call-out fee applies.

Safe checks stop outside the board: is there power at the isolator, does the house have power, has the battery run flat after a long outage, are the beams clear, and are there ants around the motor? Leave the cover on. The board sits beside mains wiring and the motor's high-current circuits, and a board touched while live, or with a screwdriver, can turn a repair into a replacement.

When you book, a photo of the motor's label and of the board's lights or display tells us what to bring. Same-day repairs are offered when the day allows. All our spare parts are genuine, and every repair comes with our six-month guarantee on our repairs.