What the E0032 alarm means

The servo amplifier detected an overcurrent in the motor circuit. This is a routine repair in our workshop for Nachi AW / FD series systems, and we normally pin it down during the first site check.

Most common causes

  • Motor winding short
  • Power cable short to ground
  • Mechanical seizure driving current up
  • Failed amplifier power stage
Field note: Begin with the first item in the list; it has a far higher on-machine occurrence rate than the others.

Step-by-step field fix

  1. Measure motor winding resistance and insulation
  2. Check power cable for shorts
  3. Check for mechanical seizure
  4. Inspect the amplifier
  5. Replace motor or amplifier as indicated
Safety first: For NACHI e0032, 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. What you can check yourself first is Measure motor winding resistance and insulation; the DC bus and power stage handling is not a DIY job. On NACHI e0032: 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

NACHI e0032 belongs to the drive & power stage family. On NACHI e0032 the failing stage is servo amplifier modules in the cabinet, assigned per axis on the AX-series / FD-series controllers - the fault sits on the energy chain: mains input, rectification, DC bus, braking resistor, inverter power devices and the drive board. We start reading NACHI e0032 at the pendant error-code screen (E-series codes) with amplifier panel indicators.

The chain involved in NACHI e0032 runs: three-phase mains -> rectifier -> DC bus (bus capacitors) -> brake chopper / braking resistor -> inverter (IGBT) -> motor.

Bottom line up front: Motor winding short is the first suspect for NACHI e0032, but read it along the energy chain: Any link on this chain dropping voltage shows up at the end as a drive alarm, so order matters. We measure the mains first: more than 3% phase imbalance is enough to sag the bus under load, and plenty of bus over/under-voltage alarms are actually a grid problem wearing a robot costume. Mains fine, then the bus capacitors - bulged cases, weeping electrolyte or a lifted vent mean replacement; capacitance down 20% or more cannot hold the bus during braking. Last, the braking resistor: healthy values sit in the tens of ohms depending on rating, and an open or drifted resistor trips regenerative overvoltage directly.

Field notes on this page cover NACHI e0032 (Overcurrent); written by the Henghuan repair team, updated 2026-10-01.

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Related Drive & Power Stage alarms

E0028 — Motor Power Voltage Drop E0038 — Overload E0042 — Motor Temperature Rise Abnormal E0044 — Motor Power Overvoltage
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 Omron · ESTUN · INOVANCE and more — see the complete alarm code hub.

Frequently asked questions

QWhat does the NACHI e0032 alarm mean?

The servo amplifier detected an overcurrent in the motor circuit. This is a routine repair in our workshop for Nachi AW / FD series systems, and we normally pin it down during the first site check. NACHI e0032 sits in the drive & power stage family; on our work orders the highest-frequency trigger for this code is "Motor winding short".

QCan I clear a NACHI e0032 alarm myself?

Whether NACHI e0032 clears on its own depends on the outcome of "Measure motor winding resistance and insulation". Finish the flow with "Replace motor or amplifier as indicated" to confirm NACHI e0032 - do not skip it. If that step is clean, the second most frequent cause on NACHI e0032 is "Power cable short to ground". If NACHI e0032 returns after two clears, or the checks point at Motor winding short, stop the cell and call a professional robot repair engineer.

QFor drive/power alarms like NACHI e0032, what spares do you bring on site?

The commonest causes we see on NACHI e0032 are "Motor winding short, Power cable short to ground, Mechanical seizure driving current up", so we stock the van against those. For NACHI e0032 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 NACHI e0032, drive alarms usually stop the whole line, so they sit at the front of our dispatch queue. Before we roll, tell us what NACHI e0032 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 notes on NACHI e0032 were summarized by the Henghuan Robotics repair team from on-site service. The alarm interpretation is our empirical summary for troubleshooting reference and may vary by controller and software version — please check Nachi documentation or contact us with questions. Henghuan is an independent service provider, not affiliated with or endorsed by Nachi.