DSC-BRAIN USER GUIDE · TROUBLESHOOTING
Troubleshooting — where to start
A first-five-minutes checklist and a symptom index pointing at the right page.
● verified for 9.0.0 · firmware train 8.2.0.0
● last verified 2026-09-17 · 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 the ladder on its own. If the hub heartbeat chip is alive, the climate is being kept regardless of anything else on this list.
- 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 |
|---|---|
| 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 |
| 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 |
| 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