DSC-BRAIN USER GUIDE · TROUBLESHOOTING
Troubleshooting — where to start
A first-five-minutes checklist and a symptom index pointing at the right page.
Do this first: work through First five minutes, then find your symptom in the table and open that page.
● verified for 9.0.0 · corrected for 9.8.0 on 2026-09-30
● first mirrored 2026-09-15
First five minutes
- Is the room safe? A Smoke detected, Gas detected or Carbon monoxide alert means go to the room first, before anything on this page. Otherwise: the hub runs its wired fans and dimmed lamps on its own. If the hub heartbeat chip is alive, those are being kept regardless of anything else on this list; the heater, humidifier, dehumidifier and heat mat are on plugs the brain switches. If any plug, cable or heater is hot to the touch, smells burnt or looks scorched, switch it off at the wall and unplug it before you go on.
- Read the Alerts desk. Critical first. Each card names the entity and the zone.
- Kit › Inventory. Which devices are online, which are in service, and the hub link chips.
- Settings › System › Time. A CLOCK INVALID hub explains most lamp surprises.
- Settings › System › About. Surface, expected firmware and served routes; a mismatch explains a card that says predates.
Symptom index
| Symptom | Page |
|---|---|
| Smoke, gas or CO alarm; heater, heat mat or lamp plugs held off after one | Alert catalogue (Critical), then Settings › Devices › Zigbee › Safety cut-off |
| A plug, cable or heater is hot, smells burnt or looks scorched | Switch it off at the wall and unplug it, then Plugs and appliances |
| Dashboard will not load | Cannot reach the dashboard |
| HUB LINK DOWN, hub not reporting | Hub offline or not reporting |
| Probe grey, probe dark, channel fault | Probe dark or faulted |
| Heater or plug not reporting, relay mismatch, ineffective | Plugs and appliances |
| HELD chips, values not updating | Readings held or stale |
| Lamp on or off when it should not be | Lamp and photoperiod surprises |
| RADIO DOWN, pairing fails | Zigbee radio down or pairing fails |
| Tuya device dead, Err 901 / 914 | Tuya device will not connect |
| No camera frame, ffmpeg missing | Camera shows no frame |
| Update refused, canary failed | Updates and firmware jobs fail |
| Dashboard slow, hub rebooting, brain restarting | Brain overloaded |
| USB flash Port list is empty | Flashing devices over USB, under When the Port list is empty |
| Commission kit is refused in the setup wizard | Setup wizard, under Step 5 · Go live |
| Something the kit says it cannot do | Known limitations |
Before you change anything
- Take a backup (Settings › System › Backup).
- Raise the brain log level to DEBUG only while you look, then drop it back.
- Do not factory-reset the Zigbee coordinator or the fleet config to fix a single device.
DSC-Brain user guide · Troubleshooting — where to start · this page is edited on the site; the Notion original was retired after the mirror