What the 30002 alarm means

An E-stop in the safety chain is active; servo power is cut as designed. This is a high-frequency ticket for our AUBO repair team, and on i-series / C-series (ARCS SDK) systems one inspection usually identifies the fault.

Most common causes

  • Teach-pendant or cabinet E-stop pressed
  • External E-stop from the cell
  • Stuck E-stop button
  • Open wiring in the E-stop loop
Field note: The top-listed cause has the highest hit rate, so checking it first narrows things down fast.

Step-by-step field fix

  1. Release all E-stops in the cell
  2. Press safety reset
  3. If the alarm stays, check for a stuck button
  4. Meter the E-stop loop continuity
  5. Re-enable and verify manual motion
Safety first: For AUBO 30002, this alarm is the safety circuit itself: jumpering a door switch or forcing a contactor removes the protection entirely - no protective action when something happens, and no defensible account of responsibility. What you can check yourself first is Release all E-stops in the cell; the e-stop chain and safety circuit handling is not a DIY job.

How we diagnose safety-chain faults on site

AUBO 30002 belongs to the safety chain & e-stop family. On AUBO 30002 the failing stage is collaborative safety (collision detection, speed limits, force and current monitoring) on the AUBO collaborative robot controller - continuity of one series loop: e-stop buttons, door switches, light curtains, safety relays and the enabling device. We start reading AUBO 30002 at the pendant alarm list and SDK / ARCS return codes; 1xxxx joint level, 2xxxx / 3xxxx safety and communication.

The chain involved in AUBO 30002 runs: e-stop / door / curtain -> safety relay (dual channel) -> controller safety input -> motor-off and brake apply.

On AUBO 30002 the field usually reports Teach-pendant or cabinet E-stop pressed, but the check that matters is not continuity: The point of a safety loop is not whether it conducts but whether both channels conduct together. The relay compares channels; if one opens tens of milliseconds early it latches as a channel fault. The commonest causes are plain: oxidised door-switch contacts raising contact resistance, or one loose terminal. We measure segment by segment - pendant e-stop, panel e-stop, external e-stop, safety door - and lock onto whichever segment reads differently on the two channels.

Field notes on this page cover AUBO 30002 (Emergency Stop Active); written by the Henghuan repair team, updated 2026-10-01.

If you can't fix it, reach our engineers directly

Share the alarm code, machine model and the operating condition at the moment of the alarm. Our engineers are highly experienced with AUBO 30002, and remote diagnosis (phone/video) is completely free.

Get a Free Remote Diagnosis See Repair Services

Hotline: +86-20-39029800 · WhatsApp: +86-188-1886-2860

Related Safety Chain & E-Stop alarms

20002 — Safety Configuration Error 30001 — Collision Detected
Same family: this code belongs to the Safety chain & e-stop alarms family - the page collects all Safety chain & e-stop-family codes we have handled, with the common inspection order and spares.
Other brands: we also keep field-fix libraries for ROKAE · Dobot · FANUC and more — see the complete alarm code hub.

Frequently asked questions

QWhat does the AUBO 30002 alarm mean?

An E-stop in the safety chain is active; servo power is cut as designed. This is a high-frequency ticket for our AUBO repair team, and on i-series / C-series (ARCS SDK) systems one inspection usually identifies the fault. AUBO 30002 sits in the safety chain & e-stop family; on our work orders the highest-frequency trigger for this code is "Teach-pendant or cabinet E-stop pressed".

QCan I clear a AUBO 30002 alarm myself?

Whether AUBO 30002 clears on its own depends on the outcome of "Release all E-stops in the cell". Finish the flow with "Re-enable and verify manual motion" to confirm AUBO 30002 - do not skip it. If that step is clean, the second most frequent cause on AUBO 30002 is "External E-stop from the cell". When AUBO 30002 keeps coming back it is not a one-off trigger - especially if Re-enable and verify manual motion is where you get stuck. Do not keep producing through AUBO 30002.

QA safety-chain fault like AUBO 30002 stops the line - how fast can you be here?

The commonest causes we see on AUBO 30002 are "Teach-pendant or cabinet E-stop pressed, External E-stop from the cell, Stuck E-stop button", so we stock the van against those. For AUBO 30002 specifically, we stock along the loop: safety relays, common door switches, e-stop buttons, light-curtain pairs and terminal blocks. For AUBO 30002, a safety-chain fault stops the whole line, so we rank it top priority and pre-triage by phone: door switch, e-stop or relay. Before we roll, tell us what AUBO 30002 shows on the pendant alarm list and SDK / ARCS return codes; 1xxxx joint level, 2xxxx / 3xxxx safety and communication and what the machine was doing - phone or video triage is free.

The notes on AUBO 30002 were summarized by the Henghuan Robotics repair team from on-site service. The alarm interpretation is our empirical summary for troubleshooting reference and may vary by controller and software version — please check AUBO documentation or contact us with questions. Henghuan is an independent service provider, not affiliated with or endorsed by AUBO.