Auto-Trail Electrical System
(V-Line SE, 2026 Model Year)
View official manual on manufacturer's site ↗Also Fitted To This Caravan
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Possible Cause | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|---|
Red LED below fuse | Red LED below fuses (2-9) on the PSU is illuminated | The respective fuse has blown while the circuit was active. | Investigate the fault, then replace the blown fuse with a new one of the exact same amperage rating. Never use a higher rating. | DIY Safe |
Frequently Asked Questions
Q: How do I activate silent mode on the Sargent PX310 battery charger?
Hold the button down for 3 seconds to turn silent mode on - it quietens the fan down overnight by capping output at 5A.
Q: Which fuse or MCB protects which circuit, and what rating should I use to replace one?
On the PSU (fuses 2 to 9 each show a red LED beneath them once blown, for whichever circuit is actually in use): Fuse 1 (25A, white) - Charger; Fuse 2 (10A, red) - 12V Sockets; Fuse 3 (10A, red) - Main Lighting; Fuse 4 (7.5A, brown) - Auxiliary/Awning Lighting; Fuse 5 (7.5A, brown) - Filler Pump; Fuse 6 (7.5A, brown) - Pump; Fuse 7 (7.5A, brown) - Dimmable Lighting; Fuse 8 (7.5A, brown) - Permanent (Unswitched); Fuse 9 (10A, red) - Compressor Fridge (Permanent Switched).
MCBs: MCB 1 (16A) - Heating System; MCB 2 (10A) - 230V Sockets; MCB 3 (10A) - Fridge/Charger. Always fit a replacement fuse rated the same as the original - never a higher one, since that risks damage to the wiring harness. If a new fuse blows again straight away, don't just keep swapping it out - get the underlying fault checked and speak to your dealer.