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Manufacturer document · reviewed 2026-11-05

OKIN dual-column desk (S2-2#): error codes and reset

Letters and short codes on a height display: rES, E-1 … E-4, ovr, dut. The instruction is published by DewertOkin as its AB02 handset file and describes a 29 V DC two-column desk with memory keys 1–3 and an S key.

Error codes

DisplayMeaningWhat to do
rES / E-1Reset neededManual reset required or in progress.Run the manual reset: hold DOWN until the desk lowers, rises slightly and shows the lowest height. It is needed after installation and after a power loss.
E-2Fix yourselfAnti-collision triggered by an obstacle.The desk reverses a short distance by itself. Remove the obstacle; normal use is then possible.
E-3Reset neededMotor or plug detection fault.Check that every cable is firmly connected. Unplug the main cable, wait at least 5 seconds, plug it back in and then perform the manual reset.
E-4Reset neededThe two legs differ in height by more than 1 inch (about 2.5 cm).Stop using the desk and perform the manual reset so both columns re-synchronise.
ovrFix yourselfOverload.Remove load from the desktop. The instruction states the overload threshold as 1000 N (102 kg / 225 lb), while its technical data list 800 N maximum load — stay within the lower figure.
dutFix yourselfDuty-cycle protection: operated too long without a rest.Let the desk rest for about 18 minutes (duty cycle 2 min on / 18 min off).

Reset step by step

  1. Keep the travel path clear: anti-collision is not active during every reset.
  2. Press and hold DOWN until the display alternates between “E-1” and “rES”, then release.
  3. Press and hold DOWN again. The desk lowers slowly, then rises slightly until the display shows “27.6”.
  4. Release the key. The desk is ready for normal use.

Save a memory position

  1. Move to the desired height.
  2. Hold S until the display shows “S - -”.
  3. Press 1 (the display alternates “S-1” and the height), then press S to store. Repeat with 2 or 3.

Switch cm / inch

  1. Hold S until “S - -” appears.
  2. Press UP until “Unt” is shown.
  3. Press 1 for centimetres or 2 for inches, then S to save.

Set or clear height limits

  1. Hold S until “S - -” appears, then press UP until “HLP” flashes.
  2. Press 1 (“H-P”), move to the upper limit and press S; press 2 (“L-P”), move to the lower limit and press S.
  3. The instruction advises using limits only when needed. A factory reset (“FAC”) clears them.

Factory reset

  1. Hold S until the display shows “FAC”, then press S again.
  2. This clears memory positions and height limits. Run the normal reset afterwards if “rES” appears.

Technical data in the document

Input100–240 V AC
Output29 V DC
Max. load (technical data)800 N / 82 kg / 180 lb
Height range (without top)70–120 cm (27.6–47.3 in)
Duty cycle2 min on / 18 min off

Common questions

Why does my desk show E-1 after a power cut?

On this system E-1/rES means the controller has lost its position reference. Hold DOWN through the reset sequence until the display shows the lowest height (27.6 in).

Is E-3 a broken motor?

Not necessarily. The documented first step is a cable check and a 5-second power disconnect, followed by a reset. If it returns, contact the desk supplier.

Source

  1. Confirmed OEM DewertOkin: OKIN S2-2# Dual Column System Instruction (AB02 instruction file, PDF)

Summarised by KUVEV. The manual supplied with your furniture takes precedence if it differs.