HeartStart FR3

1. Make sure the patient is safe — swap in a backup unit if you need to.
2. Reproduce the complaint yourself and write down exactly what you see (screen, alarm, code).
3. Check power, battery, cables, accessories, and settings before ordering parts.
4. Then open the service manual above and follow its troubleshooting section.

Ready light off, single chirps source ↗

• Press On/Off, then again for the status screen; follow resolution shown

Ready light off, triple chirps source ↗

• Press On/Off to display error; record it, turn off, remove from service, contact Philips

Ready light off, no chirp, blank screen source ↗

• Battery depleted/missing or needs repair: insert/replace battery; flashing ready after self-test = OK

Unresponsive during use source ↗

• Press On/Off, wait 1 s, press again
• Remove/reinstall or replace battery; if still stuck, don't use

Won't charge or deliver shock source ↗

• Isolate controls: try paddles vs. pads vs. front-panel buttons
• Check pad/paddle contact and cables (impedance disarm)
• Check battery / run on AC; slow charge often = battery
• Read stored failure codes in service mode before replacing therapy module