JOINT OVERHEAT ABB — Busway / Tap-off Overheat
At a glance
- Severity
- WARNING THEN STOP
- Domain
- TRANSFER_SWITCH_SYSTEM
- Reference standard
- IEC 61439-6
What it means
Overheated busway joints or tap-offs: busbar distribution outage and fire risk above the racks.
Probable causes
- Joints not torqued or removed and refitted badly
- Tap-offs overloaded or poorly seated
- Load imbalance across busway phases
- Dust accumulated in joints
Where to start
Thermography of the busway route under load: compare joints and tap-offs with peers.
Full guided diagnosis in the app
The diagnostic tree for this fault has 3 guided steps with measurements, checks and resolutions. You'll find it in DataCIQ, one of the five IndexOS apps: free, works offline.
Printable sheet + ABB updates
Leave your email: get the link to the printable ABB error-code sheet and a heads-up when we add new codes and guides.
Double opt-in, zero spam, one-click unsubscribe.
The same fault on other brands
More ABB codes
- FEED MISMATCH — Wrong A/B Feed Assignment
- STS FAULT — STS Transfer Failure
- TRANSFER FAULT — ATS Transfer Failure
- 2310 — Overcurrent Fault
- 2330 — Ground Fault
- 3210 — DC Bus Overvoltage Fault
- 3220 — DC Bus Undervoltage Fault
- 4310 — Drive Overtemperature Fault