What the E1294 alarm means

The 24 V I/O supply on the servo board dipped below its threshold; inputs to the servo logic become unreliable and the controller faults. This is one of the faults our repair team handles on Kawasaki E / F / C series (AS language) systems — the cause is usually identifiable within the first on-site inspection.

Most common causes

  • Overloaded or sagging external 24 V supply
  • Loose 24 V wiring at the servo board
  • Short to ground on an I/O line pulling the rail down
  • Failing 24 V power supply unit
Field note: the first item on this list is what we find most often on real machines. Check it before you go deeper.

Step-by-step field fix

  1. Measure the 24 V rail at the servo board under load
  2. Check for sagging when solenoids/valves actuate
  3. Inspect I/O wiring for shorts to ground
  4. Tighten all 24 V terminals
  5. Replace the 24 V supply if it cannot hold the rail
Safety first: never bypass safety circuits or force contactors closed. If the alarm involves E-stop chains, brakes or drive power, and you are not a trained robot technician, contact a professional — wrong moves here can cost you a robot or an injury.

Still stuck? Get an engineer on the phone — right now

Tell us the alarm code, the robot model and what was happening when the alarm came up. Our engineers run these diagnostics every day, and remote diagnosis by phone or video call is free.

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

Related Drive & Power Stage alarms

E1028 — Motor Overload (Axis XX) D1028 — Servo Board DC Power Abnormal (Servo FPGA) D1562 — Power Sequence Board — AC External Voltage Too High
Other brands: we also keep field-fix libraries for Staubli · Epson · Nachi and more — see the complete alarm code hub.

Frequently asked questions

QWhat does the Kawasaki E1294 alarm mean?

The 24 V I/O supply on the servo board dipped below its threshold; inputs to the servo logic become unreliable and the controller faults. In field practice it belongs to the drive & power stage family of faults.

QCan I clear a Kawasaki E1294 alarm myself?

Sometimes. Work through the step-by-step checks on this page — the first listed cause is what we find most often in the field. If the alarm returns after two attempts, or the fault involves power, brakes or safety circuits, stop and call a qualified robot service engineer.

QHow fast can a Henghuan engineer help?

On-site response in the Pearl River Delta within 30 minutes to 3 hours, across mainland China in 1-3 business days, and worldwide within 2-5 business days. Remote diagnosis by phone/WhatsApp/video is available immediately.

Written by the Henghuan Robotics repair team from field service experience. Alarm descriptions are our own summary for troubleshooting reference and may vary by controller and software version — when in doubt, check your Kawasaki documentation or contact us. Henghuan is an independent service provider, not affiliated with or endorsed by Kawasaki.