Manufacturing.
Every fault leaves a trail. Graphon traces it through your logs, video, manuals, work orders and more.
Why do the doors on unit 207 keep faulting at Riverside, and what should we fix first?
One answer, pulled together from the fault log, a platform camera, an inspection video, the door manual and the work orders.
answered from 5 of 12,600 sources
31 of the last 44 door faults happen at Riverside, platform 2, almost all on car 3, door 2. The platform camera shows that door starting to close and reopening there.
In the last inspection the technician points to a flattened door-edge seal on it; doors with a new seal close cleanly. The door manual says a worn seal can raise closing force enough to read as an obstruction.
The work orders show that seal was last replaced 14 months ago, past its 12-month interval, so it is the first fix. The platform curve may wear it faster, not confirmed; he says to check door alignment at Riverside once it is replaced.
Fault log · unit 207 · last 30 days
DOOR-OBS events by location
Central · car 1 · door 4 · 5
Riverside P2 · car 3 · door 2 · 31
Harbour · car 2 · door 1 · 3
CAM 04 · RIVERSIDE P2 · 07:42:19
Door system · maintenance manual
§ 4.2 Obstruction detection
The controller reverses the door when closing force passes the set threshold.
A flattened or torn edge seal can raise closing force enough to read as an obstruction.
Work orders · unit 207 · car 3
Door 2 · edge seal
WO-1184 · A-check · passed
WO-0962 · edge seal replaced · 14 months ago
Interval · 12 months
It happens at one platform.
1 · fault logFault log · unit 207 · door obstruction events by station, last 30 days
31 of 44 door faults happen at Riverside, platform 2, almost all on car 3, door 2.
The platform curve widens the gap on that side and wears the seal faster.
What the platform camera shows
CAM 04 · RIVERSIDE P2 · 07:42:19Station CCTV · Riverside P2 · 00:47 · car 3, door 2
The door starts to close, stops short of the frame and reopens while the others on the car stay shut.
What the technician found
Depot inspection · unit 207 · 04:18 · car 3, door 2
Technician’s walkthrough · transcript
A worn seal reads as an obstruction.
3 · 4 · closing force
Why fix the seal first
5 · work ordersWork orders · unit 207 · car 3, door 2 · edge seal
Last replaced 14 months ago, two months past its 12-month interval. Every A-check since has passed.
He says to check door alignment at Riverside once the seal is replaced.