What the 4905 alarm means

The controller's hour counter reached a configured maintenance interval — grease, belt, or inspection due. Our engineers run into this alarm every week on EFORT EC2-S controller + TSINO drives controllers, and a single on-site inspection usually identifies the problem.

Most common causes

  • Scheduled interval reached (normal)
  • Counter not reset after the last service
  • Interval set too short for the actual duty
Field note: In our repair stats the first cause has the highest hit rate, so confirm it first before digging further.

Step-by-step field fix

  1. Perform the due maintenance item per the robot manual
  2. Record date and hour-meter reading
  3. Reset the maintenance counter on the pendant
  4. Adjust the interval only if justified by real duty
  5. Keep the PM log with the machine documents
Safety first: For EFORT 4905, service work needs lock-out/tag-out: an e-stop alone is not isolation - servos stay live and an accidental enable will move the axis. What you can check yourself first is Perform the due maintenance item per the robot manual; mechanical areas and rotating parts handling is not a DIY job.

What we recommend for maintenance reminders

EFORT 4905 belongs to the maintenance due family. On EFORT 4905 the failing stage is matched servo drives assigned per axis in the cabinet on the EFORT robot controller - not a fault but a due-date signal: runtime or cycle counters reached a service interval and the controller asks for maintenance. We start reading EFORT 4905 at the pendant alarm list (four-digit codes, 1xxx / 3xxx / 4xxx segments).

The chain involved in EFORT 4905 runs: runtime / cycle counters -> service item due -> reminder alarm -> stop window planned -> consumables changed and re-checked.

EFORT 4905 is not a fault but a due-date signal: A maintenance reminder is not a fault, yet sites either report it as one or ignore it until something breaks. Our advice is to treat it as a scheduling signal: since the line stops anyway, change grease, batteries, fans and filters in the same window and do a precision re-check while you are in there. Doing them separately costs multiple stops, and stop losses usually dwarf consumable cost. We ask for the production plan first and fit the service into a window that already exists.

Field notes on this page cover EFORT 4905 (Maintenance Interval Due (EC2-S)); written by the Henghuan repair team, updated 2026-10-01.

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Related Maintenance alarms

1030 — Drive Overtemperature (TSINO) 4901 — Encoder Battery Low Warning (EC2-S)
Same family: this code belongs to the Maintenance due alarms family - the page collects all Maintenance due-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 4905 alarm mean?

The controller's hour counter reached a configured maintenance interval — grease, belt, or inspection due. Our engineers run into this alarm every week on EFORT EC2-S controller + TSINO drives controllers, and a single on-site inspection usually identifies the problem. EFORT 4905 sits in the maintenance due family; on our work orders the highest-frequency trigger for this code is "Scheduled interval reached (normal)".

QCan I clear a EFORT 4905 alarm myself?

Whether EFORT 4905 clears on its own depends on the outcome of "Perform the due maintenance item per the robot manual". Finish the flow with "Keep the PM log with the machine documents" to confirm EFORT 4905 - do not skip it. If that step is clean, the second most frequent cause on EFORT 4905 is "Counter not reset after the last service". Two attempts and still there means stop: EFORT 4905 involves mechanical areas and rotating parts, and running EFORT 4905 on can turn a repairable fault into a replacement.

QEFORT 4905 is only a maintenance reminder - do I need an engineer on site?

The commonest causes we see on EFORT 4905 are "Scheduled interval reached (normal), Counter not reset after the last service, Interval set too short for the actual duty", so we stock the van against those. For EFORT 4905 specifically, we stock consumables against the interval table: grease, batteries, filter mats, belts - changed in one visit to avoid a second stop. For EFORT 4905, a maintenance reminder can be planned rather than rushed, but fit it into the nearest stop window. Before we roll, tell us what EFORT 4905 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 4905 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 EFORT documentation or reach out to us. Henghuan is an independent service provider with no affiliation or endorsement by EFORT.