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 fault appears in a large share of our EFORT EC2-S controller + TSINO drives service tickets, and the first round of on-site checks usually finds the source.

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: Most of the time the problem is the first item on the list, so ruling it out saves you half the time.

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: For EFORT 1802, 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. The self-serviceable action is Walk the cell and release every E-stop button; anything past that falls under the e-stop chain and safety circuit and needs a certified engineer.

How we diagnose safety-chain faults on site

EFORT 1802 belongs to the safety chain & e-stop family. On EFORT 1802 the failing stage is e-stop circuit plus safety inputs on the EFORT robot controller - continuity of one series loop: e-stop buttons, door switches, light curtains, safety relays and the enabling device. We start reading EFORT 1802 at the pendant alarm list (four-digit codes, 1xxx / 3xxx / 4xxx segments).

The chain involved in EFORT 1802 runs: e-stop / door / curtain -> safety relay (dual channel) -> controller safety input -> motor-off and brake apply.

On EFORT 1802 (field clue usually Pendant or cabinet E-stop pressed) we have one hard rule: On this family we have a hard rule: no bypassing the safety loop, no forcing contactors closed, ever. Some sites jumper the door switch to keep running - that removes the entire protection function, and when something happens there is no protective action and no defensible account of responsibility. We have seen a crush injury caused by exactly that jumper, so we would rather wait for parts than do it. If a customer has already jumpered it, we restore the circuit first and then diagnose the real fault.

Field notes on this page cover EFORT 1802 (Emergency Stop Active (EC2-S)); written by the Henghuan repair team, updated 2026-10-01.

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Related Safety Chain & E-Stop alarms

1801 — Safety Circuit Major Fault (EC2-S) 1810 — Enable Switch Fault (EC2-S)
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 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. This fault appears in a large share of our EFORT EC2-S controller + TSINO drives service tickets, and the first round of on-site checks usually finds the source. EFORT 1802 sits in the safety chain & e-stop family; on our work orders the highest-frequency trigger for this code is "Pendant or cabinet E-stop pressed".

QCan I clear a EFORT 1802 alarm myself?

Whether EFORT 1802 clears on its own depends on the outcome of "Walk the cell and release every E-stop button". Finish the flow with "Reset and re-enable servos" to confirm EFORT 1802 - do not skip it. If that step is clean, the second most frequent cause on EFORT 1802 is "External E-stop from the cell pressed". When EFORT 1802 keeps coming back it is not a one-off trigger - especially if Reset and re-enable servos is where you get stuck. Do not keep producing through EFORT 1802.

QA safety-chain fault like EFORT 1802 stops the line - how fast can you be here?

The commonest causes we see on EFORT 1802 are "Pendant or cabinet E-stop pressed, External E-stop from the cell pressed, E-stop button stuck mechanically", so we stock the van against those. For EFORT 1802 specifically, we stock along the loop: safety relays, common door switches, e-stop buttons, light-curtain pairs and terminal blocks. For EFORT 1802, 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 EFORT 1802 shows on the pendant alarm list (four-digit codes, 1xxx / 3xxx / 4xxx segments) and what the machine was doing - phone or video triage is free.

This page on EFORT 1802 was 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.