What the Er.650 alarm means

Drive heatsink temperature exceeded the limit; the drive derates or trips to protect the power module. In our INOVANCE service archive this alarm on IRCB500 / IRCB501 + SV660 servo systems shows up constantly, and the first on-site inspection almost always locates it.

Most common causes

  • Cabinet cooling fan failed
  • Clogged filters or heatsink fins
  • Ambient temperature above specification
  • Repeated overload resets without cooling time
Field note: The first cause is the most common in the field — check it first, then work through the rest.

Step-by-step field fix

  1. Let the drive cool before resetting — repeated resets cook the module
  2. Verify cabinet fans spin and move air
  3. Clean filters and heatsink fins
  4. Lower cabinet ambient temperature
  5. Review the duty cycle for sustained peaks
Safety first: For INOVANCE er-650, 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 Let the drive cool before resetting — repeated resets cook the module; mechanical areas and rotating parts handling is not a DIY job.

What we recommend for maintenance reminders

INOVANCE er-650 belongs to the maintenance due family. On INOVANCE er-650 the failing stage is Inovance servos (SV660N class), same family as the robot controller on the Inovance robot controllers (IRCB series and kin) - 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 INOVANCE er-650 at the pendant alarm screen (ER.xxx / 0x9xxx segments) and the servo panel Er code.

The chain involved in INOVANCE er-650 runs: runtime / cycle counters -> service item due -> reminder alarm -> stop window planned -> consumables changed and re-checked.

For INOVANCE er-650 confirm which service item is due first: Maintenance is not swapping parts by feel; it is working an interval table item by item. Intervals differ widely - grease, batteries, fans and filters each run their own clock, and reducer re-greasing intervals depend on load duty: a high-takt continuous cell re-greases sooner. We put the official interval table for the model next to the customer's actual duty, compute due dates per item and hand over a schedule, so nothing due gets missed and nothing not due gets spent on.

Field notes on this page cover INOVANCE er-650 (Heatsink Overtemperature); written by the Henghuan repair team, updated 2026-10-01.

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Related Maintenance alarms

Er.101 — Parameter Storage Exception Er.102 — Encoder Communication Fault Er.201 — Hardware Overcurrent Er.210 — Motor Overload Er.234 — Runaway / Loss of Control Er.400 — Main Circuit Overvoltage
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 EFORT · JAKA · AUBO and more — see the complete alarm code hub.

Frequently asked questions

QWhat does the INOVANCE er-650 alarm mean?

Drive heatsink temperature exceeded the limit; the drive derates or trips to protect the power module. In our INOVANCE service archive this alarm on IRCB500 / IRCB501 + SV660 servo systems shows up constantly, and the first on-site inspection almost always locates it. INOVANCE er-650 sits in the maintenance due family; on our work orders the highest-frequency trigger for this code is "Cabinet cooling fan failed".

QCan I clear a INOVANCE er-650 alarm myself?

Whether INOVANCE er-650 clears on its own depends on the outcome of "Let the drive cool before resetting — repeated resets cook the module". Finish the flow with "Review the duty cycle for sustained peaks" to confirm INOVANCE er-650 - do not skip it. If that step is clean, the second most frequent cause on INOVANCE er-650 is "Clogged filters or heatsink fins". If INOVANCE er-650 returns after two clears, or the checks point at Cabinet cooling fan failed, stop the cell and call a professional robot repair engineer.

QINOVANCE er-650 is only a maintenance reminder - do I need an engineer on site?

The commonest causes we see on INOVANCE er-650 are "Cabinet cooling fan failed, Clogged filters or heatsink fins, Ambient temperature above specification", so we stock the van against those. For INOVANCE er-650 specifically, we stock consumables against the interval table: grease, batteries, filter mats, belts - changed in one visit to avoid a second stop. For INOVANCE er-650, a maintenance reminder can be planned rather than rushed, but fit it into the nearest stop window. Before we roll, tell us what INOVANCE er-650 shows on the pendant alarm screen (ER.xxx / 0x9xxx segments) and the servo panel Er code and what the machine was doing - phone or video triage is free.

This page on INOVANCE er-650 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 INOVANCE documentation or reach out to us. Henghuan is an independent service provider with no affiliation or endorsement by INOVANCE.