What the Er.210 alarm means

The motor ran above its thermal model limit; the drive trips to protect the winding before insulation damage occurs. This is one of the most common faults in our repair logs for the INOVANCE IRCB500 / IRCB501 + SV660 servo platform, and the first inspection typically locates the cause.

Most common causes

  • Payload heavier than the value set in the parameters
  • Mechanical binding or worn reducer adding drag
  • Duty cycle too aggressive with no cooling margin
  • Brake not fully releasing on the axis
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. Correct the payload and inertia parameters to the real tool
  2. Backdrive the axis by hand to feel for mechanical drag
  3. Check brake release with the axis enabled
  4. Add pauses or reduce speed in the hottest part of the cycle
  5. Monitor drive temperature and current over a shift after the fix
Safety first: For INOVANCE er-210, this alarm family involves the DC bus, which sits at several hundred volts and stays charged for minutes after power-off - touching terminals is a shock hazard. On site you may not carry out the first step yourself: Correct the payload and inertia parameters to the real tool. Beyond that it is the DC bus and power stage work - leave it to a professional. On INOVANCE er-210: checking incoming voltage at the disconnect and looking at breakers and fuses is fine to do yourself; opening the cabinet to touch bus terminals or pulling power modules needs a qualified electrician.

How we diagnose drive alarms on site

INOVANCE er-210 belongs to the drive & power stage family. On INOVANCE er-210 the failing stage is Inovance servos (SV660N class), same family as the robot controller on the Inovance robot controllers (IRCB series and kin) - the fault sits on the energy chain: mains input, rectification, DC bus, braking resistor, inverter power devices and the drive board. We start reading INOVANCE er-210 at the pendant alarm screen (ER.xxx / 0x9xxx segments) and the servo panel Er code.

The chain involved in INOVANCE er-210 runs: three-phase mains -> rectifier -> DC bus (bus capacitors) -> brake chopper / braking resistor -> inverter (IGBT) -> motor.

When INOVANCE er-210 fires, the site usually reports Payload heavier than the value set in the parameters first, but the real cause is often cooling: More than half of power-stage alarms are not a dead device but a device cooked by failed cooling. A stopped cabinet fan, a packed filter mat or a dusted air duct keeps IGBT junction temperature high: intermittent over-temperature first, hard fault days later. On these alarms we open the power module and look for cracked thermal paste and felted dust in the duct, then measure phase-to-phase output and insulation to frame. Swapping the module without cleaning the duct just buys the same failure again.

Field notes on this page cover INOVANCE er-210 (Motor Overload); written by the Henghuan repair team, updated 2026-10-01.

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

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Related Drive & Power Stage alarms

Er.201 — Hardware Overcurrent Er.400 — Main Circuit Overvoltage Er.410 — Main Circuit Undervoltage Er.610 — Drive Overload (I2t) Er.920 — Regenerative Overload
Same family: this code belongs to the Drive & power stage alarms family - the page collects all Drive & power stage-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-210 alarm mean?

The motor ran above its thermal model limit; the drive trips to protect the winding before insulation damage occurs. This is one of the most common faults in our repair logs for the INOVANCE IRCB500 / IRCB501 + SV660 servo platform, and the first inspection typically locates the cause. INOVANCE er-210 sits in the drive & power stage family; on our work orders the highest-frequency trigger for this code is "Payload heavier than the value set in the parameters".

QCan I clear a INOVANCE er-210 alarm myself?

Whether INOVANCE er-210 clears on its own depends on the outcome of "Correct the payload and inertia parameters to the real tool". Finish the flow with "Monitor drive temperature and current over a shift after the fix" to confirm INOVANCE er-210 - do not skip it. If that step is clean, the second most frequent cause on INOVANCE er-210 is "Mechanical binding or worn reducer adding drag". After clearing INOVANCE er-210, watch it for one shift. A second trip means stop and let an engineer arrive with the right test gear for the DC bus and power stage.

QFor drive/power alarms like INOVANCE er-210, what spares do you bring on site?

The commonest causes we see on INOVANCE er-210 are "Payload heavier than the value set in the parameters, Mechanical binding or worn reducer adding drag, Duty cycle too aggressive with no cooling margin", so we stock the van against those. For INOVANCE er-210 specifically, we stock the van along the energy chain: braking resistors, bus capacitors, input fuses, drive-board supply parts and the common power modules for the brand. For INOVANCE er-210, drive alarms usually stop the whole line, so they sit at the front of our dispatch queue. Before we roll, tell us what INOVANCE er-210 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.

The content on INOVANCE er-210 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 INOVANCE documentation, or contact us to confirm. Henghuan is an independent service provider with no affiliation or endorsement by INOVANCE.