What the E1027 alarm means

The hardware safety chain (E-stop loop, guard doors, external safety devices) is open; motor power is held off until the chain closes. This is one of the most common faults in our repair logs for the Kawasaki E / F / C series (AS language) platform, and the first inspection typically locates the cause.

Most common causes

  • An E-stop in the cell is still pressed
  • Guard door switch open or misaligned
  • Safety loop wiring broken or a maintenance jumper left out
  • Faulty external safety relay
Field note: Field experience says the first cause is the most likely — verify it before moving on to the rest.

Step-by-step field fix

  1. Release every E-stop and close all guards in the cell
  2. Trace the safety loop against the wiring diagram
  3. Check external safety relay state
  4. Reset the error and confirm motor power can be turned on
  5. Never bypass the safety chain to keep production running
Safety first: For Kawasaki e1027, 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 every E-stop and close all guards in the cell; the e-stop chain and safety circuit handling is not a DIY job.

How we diagnose safety-chain faults on site

Kawasaki e1027 belongs to the safety chain & e-stop family. On Kawasaki e1027 the failing stage is external e-stop chain plus controller safety board on the E-Controller / D-Controller / F-Controller - continuity of one series loop: e-stop buttons, door switches, light curtains, safety relays and the enabling device. We start reading Kawasaki e1027 at the pendant ERROR HISTORY with AS error numbers (D / E / P prefixes).

The chain involved in Kawasaki e1027 runs: e-stop / door / curtain -> safety relay (dual channel) -> controller safety input -> motor-off and brake apply.

On Kawasaki e1027 (field clue usually An E-stop in the cell is still 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 Kawasaki e1027 (Safety Circuit Cut); written by the Henghuan repair team, updated 2026-10-01.

Real Field Case

Machine: Kawasaki RS010N (2017)

Symptom: A Kawasaki RS010N raised E1027 (safety circuit cut off).

What we did: We traced the safety circuit segment by segment and located the break at the external safety-door relay, then replaced and reset it.

Result: The alarm cleared once the safety circuit was restored; about 2.5 hours.

Blocked by this alarm? We can help you analyze it over the phone

Provide the alarm code, model and the action being performed at the alarm. Our engineers have seen Kawasaki e1027 Kawasaki e1027 many times and judge fast; phone and video remote diagnosis are both free.

Get a Free Remote Diagnosis See Repair Services

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

Related Safety Chain & E-Stop alarms

P1001 — Program Cannot Be Executed in Teach Mode W1013 — Encoder Battery Voltage Low (Warning) E1028 — Motor Overload (Axis XX) E1029 — Encoder Revolution Count Abnormal (Axis XX) E1030 — Encoder Data Abnormal (Axis XX) E1033 — Encoder Line Error (Axis XX)
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 Staubli · Epson · Nachi and more — see the complete alarm code hub.

Frequently asked questions

QWhat does the Kawasaki e1027 alarm mean?

The hardware safety chain (E-stop loop, guard doors, external safety devices) is open; motor power is held off until the chain closes. This is one of the most common faults in our repair logs for the Kawasaki E / F / C series (AS language) platform, and the first inspection typically locates the cause. Kawasaki e1027 sits in the safety chain & e-stop family; on our work orders the highest-frequency trigger for this code is "An E-stop in the cell is still pressed".

QCan I clear a Kawasaki e1027 alarm myself?

Whether Kawasaki e1027 clears on its own depends on the outcome of "Release every E-stop and close all guards in the cell". Finish the flow with "Never bypass the safety chain to keep production running" to confirm Kawasaki e1027 - do not skip it. If that step is clean, the second most frequent cause on Kawasaki e1027 is "Guard door switch open or misaligned". When Kawasaki e1027 keeps coming back it is not a one-off trigger - especially if Never bypass the safety chain to keep production running is where you get stuck. Do not keep producing through Kawasaki e1027.

QA safety-chain fault like Kawasaki e1027 stops the line - how fast can you be here?

The commonest causes we see on Kawasaki e1027 are "An E-stop in the cell is still pressed, Guard door switch open or misaligned, Safety loop wiring broken or a maintenance jumper left out", so we stock the van against those. For Kawasaki e1027 specifically, we stock along the loop: safety relays, common door switches, e-stop buttons, light-curtain pairs and terminal blocks. For Kawasaki e1027, 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 Kawasaki e1027 shows on the pendant ERROR HISTORY with AS error numbers (D / E / P prefixes) and what the machine was doing - phone or video triage is free.

This page on Kawasaki e1027 is based on the field experience of the Henghuan Robotics repair team. Alarm explanations are our own summary for troubleshooting reference and may differ across controller and software versions — if unsure, verify against Kawasaki documentation or reach out to us. Henghuan is an independent service provider with no affiliation or endorsement by Kawasaki.