What the 1015 alarm means

No KRL program is selected as the active program at startup or mode change, so START does nothing. This is one of the faults our repair team handles on KUKA KRC2 / KRC4 / KRC5 (KSS) systems — the cause is usually identifiable within the first on-site inspection.

Most common causes

  • Controller rebooted without auto-selecting CELL.SRC
  • The selected program was deleted or its path changed
  • SPS auto-select logic disabled or failing
  • Corrupted user-group or selection settings
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. Manually select the intended program on the SmartPad (Navigator → Program)
  2. Verify CELL.SRC exists and is the configured submit interpreter program
  3. Check the SPS auto-select logic if the cell relies on it
  4. Restart the controller and confirm the program is selected within seconds of boot
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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Related System & Program alarms

1004 — File System Error 1020 — Pending Message Not Acknowledged ($CONF_MESS) 1030 — External Start Missing ($EXT_START) 15102 — SmartPad (Teach Pendant) Fault
Other brands: we also keep field-fix libraries for ABB · Yaskawa · Universal Robots and more — see the complete alarm code hub.

Frequently asked questions

QWhat does the KUKA 1015 alarm mean?

No KRL program is selected as the active program at startup or mode change, so START does nothing. In field practice it belongs to the system & program family of faults.

QCan I clear a KUKA 1015 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 KUKA documentation or contact us. Henghuan is an independent service provider, not affiliated with or endorsed by KUKA.