What the 1802 alarm means

An E-stop in the chain is active; the controller has cut servo power as designed. This is a status, not a failure — but a stuck E-stop circuit looks the same. This is one of the faults our repair team handles on EFORT EC2-S controller + TSINO drives systems — the cause is usually identifiable within the first on-site inspection.

Most common causes

  • Pendant or cabinet E-stop pressed
  • External E-stop from the cell pressed
  • E-stop button stuck mechanically
  • Loose E-stop wiring
Field note: the first item on this list is what we find most often on real machines. Check it before you go deeper.

Step-by-step field fix

  1. Walk the cell and release every E-stop button
  2. Twist-release and then press the safety reset
  3. If the alarm stays, check for a stuck button
  4. Meter the E-stop loop for continuity
  5. Reset and re-enable servos
Safety first: never bypass safety circuits or force contactors closed. If the alarm involves E-stop chains, brakes or drive power, and you are not a trained robot technician, contact a professional — wrong moves here can cost you a robot or an injury.

Still stuck? Get an engineer on the phone — right now

Tell us the alarm code, the robot model and what was happening when the alarm came up. Our engineers run these diagnostics every day, and remote diagnosis by phone or video call is free.

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

Related Safety Chain & E-Stop alarms

1801 — Safety Circuit Major Fault (EC2-S) 1810 — Enable Switch Fault (EC2-S)
Other brands: we also keep field-fix libraries for JAKA · AUBO · ROKAE and more — see the complete alarm code hub.

Frequently asked questions

QWhat does the EFORT 1802 alarm mean?

An E-stop in the chain is active; the controller has cut servo power as designed. This is a status, not a failure — but a stuck E-stop circuit looks the same. In field practice it belongs to the safety chain & e-stop family of faults.

QCan I clear a EFORT 1802 alarm myself?

Sometimes. Work through the step-by-step checks on this page — the first listed cause is what we find most often in the field. If the alarm returns after two attempts, or the fault involves power, brakes or safety circuits, stop and call a qualified robot service engineer.

QHow fast can a Henghuan engineer help?

On-site response in the Pearl River Delta within 30 minutes to 3 hours, across mainland China in 1-3 business days, and worldwide within 2-5 business days. Remote diagnosis by phone/WhatsApp/video is available immediately.

Written by the Henghuan Robotics repair team from field service experience. Alarm descriptions are our own summary for troubleshooting reference and may vary by controller and software version — when in doubt, check your EFORT documentation or contact us. Henghuan is an independent service provider, not affiliated with or endorsed by EFORT.