What the SRVO-216 alarm means

The combined current of all axes exceeded the amplifier's total capacity. We see this alarm constantly when servicing FANUC R-30iA / R-30iB / R-30iB Plus systems, and the first on-site pass usually pins down the cause.

Most common causes

  • Multiple heavily loaded axes working simultaneously at high duty
  • Several axes with increased friction (worn reducers)
  • Payload settings wrong on multiple axes
Field note: Based on our handling experience the first cause is the most frequent — use it as your starting point.

Step-by-step field fix

  1. Review the cycle for simultaneous peak demands and stagger heavy moves
  2. Verify payload settings on all axes
  3. Check mechanical condition of the highest-current axes
Safety first: For FANUC srvo-216, amplifiers and boards are live parts: hot-plugging a board burns interface circuits, and body static can kill sensitive devices. On site you may look at after confirming power-off the first step yourself: Review the cycle for simultaneous peak demands and stagger heavy moves. Beyond that it is live boards and power devices work - leave it to a professional.

How we diagnose amplifier/hardware alarms on site

FANUC srvo-216 belongs to the amplifier & hardware family. On FANUC srvo-216 the failing stage is alpha-i / beta-i servo amplifiers with PSM supply modules and SVM servo modules (SPM where spindles fit) on the R-30iB Plus / R-30iB Mate Plus / R-30iA - the amplifier and drive hardware itself plus its periphery: boards, fuses, cooling, supply, connectors and self-test. We start reading FANUC srvo-216 at the iPendant ALARM screen (SRVO / MOTN / SYST / INTF prefixes) together with the amplifier's 7-segment status code.

The chain involved in FANUC srvo-216 runs: control-side signal -> amplifier board (drive and sense circuits) -> fuses and supply -> cooling -> motor-side output.

Once FANUC srvo-216 is pinned to a board, there are two routes: Amplifier faults have two routes: replace the unit, or repair at board level. Replacement is fast and reliable but costly and lead-time bound; board-level repair (power modules, capacitors, reflow, drive-circuit fixes) can cost much less but needs test capability. We choose on two facts: is the fault point unambiguous, and how much downtime can the customer absorb? Clear fault and some patience means repair; line waiting or a fault inside a multilayer board means replace. Repaired boards go out only after a loaded test.

Field notes on this page cover FANUC srvo-216 (OVC (Total Current)); written by the Henghuan repair team, updated 2026-10-01.

Can't find the cause? One call can pinpoint it

Provide the alarm code, model and the action being performed at the alarm. Our engineers have seen FANUC srvo-216 FANUC srvo-216 many times and judge fast; phone and video remote diagnosis are both free.

Get a Free Remote Diagnosis See Repair Services

Hotline: +86-20-39029800 · WhatsApp: +86-188-1886-2860

Related Amplifier & Hardware alarms

SRVO-057 — FSSB Disconnect SRVO-068 — DTERR - Data Transmission Error SRVO-069 — CRCERR - CRC Error SRVO-071 — SPHAL - Soft Phase Alarm SRVO-072 — PMAL - Pulse Coder Phase Alarm SRVO-073 — CMAL - Pulse Coder Count Error
Same family: this code belongs to the Amplifier & hardware alarms family - the page collects all Amplifier & hardware-family codes we have handled, with the common inspection order and spares.
Other brands: see our KUKA, ABB, Yaskawa and Universal Robots field-fix libraries — or the full 10-brand hub.

Frequently asked questions

QWhat does the FANUC srvo-216 alarm mean?

The combined current of all axes exceeded the amplifier's total capacity. We see this alarm constantly when servicing FANUC R-30iA / R-30iB / R-30iB Plus systems, and the first on-site pass usually pins down the cause. FANUC srvo-216 sits in the amplifier & hardware family; on our work orders the highest-frequency trigger for this code is "Multiple heavily loaded axes working simultaneously at high duty".

QCan I clear a FANUC srvo-216 alarm myself?

Whether FANUC srvo-216 clears on its own depends on the outcome of "Review the cycle for simultaneous peak demands and stagger heavy moves". Finish the flow with "Check mechanical condition of the highest-current axes" to confirm FANUC srvo-216 - do not skip it. If that step is clean, the second most frequent cause on FANUC srvo-216 is "Several axes with increased friction (worn reducers)". After clearing FANUC srvo-216, watch it for one shift. A second trip means stop and let an engineer arrive with the right test gear for live boards and power devices.

QFor hardware alarms like FANUC srvo-216, does it always mean an expensive part swap?

The commonest causes we see on FANUC srvo-216 are "Multiple heavily loaded axes working simultaneously at high duty, Several axes with increased friction (worn reducers), Payload settings wrong on multiple axes", so we stock the van against those. For FANUC srvo-216 specifically, we carry fuses, filter mats, common connectors and terminals; boards are stocked by type or go through the repair channel. For FANUC srvo-216, on hardware alarms we inspect before quoting - we do not open with replace the power stage. Before we roll, tell us what FANUC srvo-216 shows on the iPendant ALARM screen (SRVO / MOTN / SYST / INTF prefixes) together with the amplifier's 7-segment status code and what the machine was doing - phone or video triage is free.

This page on FANUC srvo-216 was compiled from actual repair records of the Henghuan Robotics repair team. Alarm notes are our own summary for troubleshooting reference only and may vary with controller and software version — please consult FANUC documentation or contact us if in doubt. Henghuan is an independent service provider, not affiliated with or endorsed by FANUC.