What the E0062 alarm means

The emergency stop circuit was momentarily activated or the motor servo high-power (MSHP) contactor opened; motion stops. This is a fault we handle frequently on Nachi AW / FD series systems — in most cases we can pin down the root cause on the first site visit.

Most common causes

  • E-stop pressed or flickering
  • Loose E-stop contact
  • MSHP contactor fault
  • Noise on the safety circuit
Field note: The first item on this list is what we hit most often on real machines — clear that one before going deeper.

Step-by-step field fix

  1. Check all E-stop devices
  2. Inspect E-stop wiring and connectors
  3. Check the MSHP contactor
  4. Look for noise sources on the safety loop
  5. Reset and confirm the circuit holds
Safety first: For NACHI e0062, 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 Check all E-stop devices; 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

NACHI e0062 belongs to the safety chain & e-stop family. On NACHI e0062 the failing stage is e-stop circuit plus safety-door inputs on the AX-series / FD-series controllers - continuity of one series loop: e-stop buttons, door switches, light curtains, safety relays and the enabling device. We start reading NACHI e0062 at the pendant error-code screen (E-series codes) with amplifier panel indicators.

The chain involved in NACHI e0062 runs: e-stop / door / curtain -> safety relay (dual channel) -> controller safety input -> motor-off and brake apply.

On NACHI e0062 the field usually reports E-stop pressed or flickering, 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 NACHI e0062 (Emergency Stop or MSHP Cut); written by the Henghuan repair team, updated 2026-10-01.

Can't clear it yourself? Contact us for remote diagnosis

Give us the alarm code, the robot model and what it was doing when the alarm hit. Our engineers run these diagnostics daily, and remote diagnosis by phone or video is free.

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Related Safety Chain & E-Stop alarms

E0012 — Robot Cannot Reach Recorded Point E0021 — Servo Follow-Up Error (Following Error) E0022 — Deviation Error E0025 — Position Jump (Jump Position) E0028 — Motor Power Voltage Drop E0029 — Encoder Incremental Data Abnormal
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 Omron · ESTUN · INOVANCE and more — see the complete alarm code hub.

Frequently asked questions

QWhat does the NACHI e0062 alarm mean?

The emergency stop circuit was momentarily activated or the motor servo high-power (MSHP) contactor opened; motion stops. This is a fault we handle frequently on Nachi AW / FD series systems — in most cases we can pin down the root cause on the first site visit. NACHI e0062 sits in the safety chain & e-stop family; on our work orders the highest-frequency trigger for this code is "E-stop pressed or flickering".

QCan I clear a NACHI e0062 alarm myself?

Whether NACHI e0062 clears on its own depends on the outcome of "Check all E-stop devices". Finish the flow with "Reset and confirm the circuit holds" to confirm NACHI e0062 - do not skip it. If that step is clean, the second most frequent cause on NACHI e0062 is "Loose E-stop contact". If NACHI e0062 returns after two clears, or the checks point at E-stop pressed or flickering, stop the cell and call a professional robot repair engineer.

QA safety-chain fault like NACHI e0062 stops the line - how fast can you be here?

The commonest causes we see on NACHI e0062 are "E-stop pressed or flickering, Loose E-stop contact, MSHP contactor fault", so we stock the van against those. For NACHI e0062 specifically, we stock along the loop: safety relays, common door switches, e-stop buttons, light-curtain pairs and terminal blocks. For NACHI e0062, 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 NACHI e0062 shows on the pendant error-code screen (E-series codes) with amplifier panel indicators and what the machine was doing - phone or video triage is free.

The content on NACHI e0062 was written by Henghuan Robotics service engineers from hands-on repair experience. Alarm descriptions are our own reference summary and may differ by controller or software version — defer to Nachi documentation, or contact us to confirm. Henghuan is an independent service provider with no affiliation or endorsement by Nachi.