Xantrex Freedom EX 4000 error code 1 (AC Output Under Voltage)
[E] Escalating auto fault, any mode: AC output under voltage. Must occur 3 times in 2 minutes before it becomes a manual fault.
What to check, and in what order, is in the app. A step-by-step flow walks this code with the pass/fail measurements, wiring schematics and procedures that go with it, and it works offline in the bay.
Start free trial 14 days free, no card neededDocumented in
- Freedom EX 4000 Inverter/Charger with 48VDC-to-12VDC Converter Owner's Guide 975-0999-01-01 Rev F (May 2025)Xantrex LLC
Related codes
- 2 (AC Output Over Voltage)[E] Escalating auto fault, any mode: AC output over voltage. Must…
- 9 (BMS Node Missing for CVCC mode)[F] Manual fault, shore (AC) mode: the charger stage is set to CVCC…
- 17 / 19 (Relay(s) Welded - AC L1)[F] Manual fault, shore (AC) mode: the AC L1 transfer relay is bad…
- 18 / 20 (Relay(s) Welded - AC L2)[F] Manual fault, shore (AC) mode: the AC L2 transfer relay is bad…