Centurion SDO4 manual: the SDO4 and SDO4 SMART in plain English

On both, the batteries carry their own six-month manufacturer's warranty.

The label on the motor-head tells them apart: the newer one says SMART. The original's control box has a small display, a yellow + and blue − button, a red Learn and a green Confirm button, and pressing its courtesy light runs the door.

The SMART also has a longer rail for caravan doors up to 3,206 mm high, and is for indoor use only (IPX0). Every figure assumes a door that runs freely, is balanced and stays put when let go of partway.

The release handle hangs from the carriage that runs along the rail.

• To free the door, pull the handle down until it clicks, ideally with the door closed; if it's partly open, make sure nothing and no one is under it first.
• To reconnect, pull the handle back towards the motor-head until it clicks, then move the door by hand until the carriage meets the bullet on the chain (on the SMART, the belt) and locks on.
• Never pull the door up or down by the release handle. Centurion warns this can cause serious injury.

If the motor fails with the door open, you can still lock the garage: free the motor, lower the door a little, reconnect the handle, lower the door fully and lift on it to check it's locked. Once the fault is fixed, free it again, raise the door slightly, reconnect, and raise it slowly until the carriage clicks onto the bullet at the top.

The release on other makes is covered in how to open a garage door manually.

Setup starts on the rail, not the display:

1. End-stops. With the motor freed and the door closed, set the closing end-stop (nearest the front wall) 10 mm from the carriage; with the door open, set the opening end-stop the same way. Tighten each stop's two grub screws until they dent the rail slightly, or the stop shifts and the setup fails, then reconnect the motor. Moving a stop 10 mm moves the door's end point 10 mm.
2. Door type. At power-up the display flashes LL and SE in turn. SE (sectional) is the default; to change it, choose tu (tip-up) with + and −, then press Confirm. L.L, with a dot between the letters, means the type is set.
3. Limits. Start with the door roughly halfway (hold + to raise it if it's within about 200 mm of closed). Press Confirm: the door closes, opens and closes again, and a single dot on the display means the limits are learnt.
4. Closed position. With the door closed, hold Learn 5 seconds until CL shows; each press of + raises the closed point 3 mm, − lowers it, and Confirm saves.

Obstruction force is set during the limit setup. From standby, + or − shows the offset, F1 the most sensitive to F5 the least; change it and press Confirm. At F5 or full power, Centurion warns, the door is dangerous without safety beams. After three safety reverses or stops in a row, or a run time that drifts, the motor relearns by itself and shows rL.

Check it monthly. Centurion's test is a 32 mm block of wood under the middle of the door: closing onto it, the door must stop and reverse. If it doesn't, call a technician.

Factory reset clears the settings, limits and force but keeps the remotes: with the motor unplugged and its batteries disconnected, hold Learn as the power goes back on and let go at Fr. Then set the door type and limits again.

The SMART's end-stops are set on the rail just like the original's, 10 mm from the carriage with the door closed and then open. Everything after that happens on a phone.

• MyCentsys Pro, the installer's app, finds the motor over Bluetooth and its prompts set the limits, obstruction sensitivity, slow stop, auto-close, separate opening and closing beams and, on tip-up doors, the speed each way. Remotes and the wall switch are added under Remotes.
• MyCentsys Remote, the everyday app, runs the door from your phone and shows its status: register, tap + SMART and pick your motor.

In a power cut, a SMART with control card 1.3 and firmware 1.10.1.0 or later can be set up on its batteries: with the battery harness's two blue connectors joined, hold the courtesy light 3 to 5 seconds until it flashes three times, set it up in the app, then put it back into Sleep Mode there. It wakes by itself when the mains returns. Wireless Photon SMART or SMARTGUARD beams need no cables run.

The original SDO4 learns remotes from its red Learn button; the SMART does it in the app. Each SDO4 remote button carries one function, and the beeps when it's learnt tell you which:

Adding a remote: in standby (just a dot showing), press Learn once; the display shows 00, or how many remotes are stored. Choose the function with + and −, then hold the remote's button about 5 seconds until the light stops flashing and the beeps confirm. Learn mode closes 10 seconds after the last button. A button learnt to the light function, held 5 seconds, opens learn mode too.

Deleting: press Learn once, then hold Confirm until the light flashes and dL appears. Every remote and the wall switch are then gone and must be learnt again.

The wireless wall switch in T12 kits has four numbered buttons learnt like a remote, so one switch can run both doors of a double garage. Mount it in sight of the door, clear of moving parts and at least 1.5 m up. The remotes are Centurion's NOVA range, also covered on Centurion remote programming.

Press + and − together to open the original SDO4's settings menu; + and − then scroll, and Confirm chooses.

Auto-close only works with safety beams fitted. Holiday lockout arms when a lockout button is held 3 seconds (one flash, one beep); other remotes then get a beep and three flashes, and a lockout button switches it off with two of each. Autoclose override, held 3 seconds with the door closed, opens the door and keeps it open until the run button closes it.

When the SDO4 finds a fault, the courtesy light flashes three times and a code appears:

The buzzer's own signals:

• Two beeps every 30 seconds: no mains; it's on the batteries.
• Three beeps every 30 seconds: no mains and the batteries are low; it won't run and shutdown is close.
• Three beeps when you press a remote: it has shut down below 23.5 V to save the batteries. The courtesy light stops below 24 V.
• E3 or E4 with five beeps: the opening and closing times are more than three seconds apart (E3), or it ran past its maximum run time (E4).

Both run the motor from two 3.4 Ah batteries in the housing on the motor-head, charged from the mains: 12 to 30 operations on the original, up to 90 on the SMART, fewer with a heavy door or old batteries. Centurion warns that batteries left connected for three months without charge are permanently damaged, so test them after a long outage. Replacements are two of the same 3.4 Ah size; how motor batteries are tested is on gate motor batteries.

Call us when the display shows E3, E6, E8 or E9, when the door won't reverse onto the block of wood, when it has grown heavy to lift by hand, or when new batteries still don't carry it through a power cut. We repair SDO4 and SDO4 SMART motors, replace batteries, reset end-stops and limits, and learn remotes and wall switches. A door out of balance is a spring job first: see garage door springs. The motor plugs into a socket on the ceiling; a new socket is a job for a registered electrician. All our spare parts are genuine. Six-month guarantee on our repairs.

For comparison, a Centurion SDO4 T10 drive sells for about R2 600 (NeonSales) in South African shops, before fitting; garage door motor prices sets it beside the other motors and the cost of fitting. 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.

• Centurion SDO4 installation manual: installation, the menu, remotes, warnings and error codes
• Centurion SDO4 garage door operator, quick guide: end-stops, door type, limits and remotes on two pages
• Centurion SDO4 SMART installation manual: the SMART's installation, battery-only setup and the apps
• Centurion SDO4 SMART garage door operator, quick guide: the SMART's fitting in brief

Centurion's other garage motor, for roll-up doors, is on the Centurion RDO manual, and the rest of the range on Centurion.