Hughes Power Watchdog EPO error code E4
Line 2 overcurrent (50 A units only) - the RV drew more than the unit's amp rating on line 2; the park breaker should have tripped and did not. Requires a manual reset.
What to check, and in what order, is in the app. The flow RV surge protector / EMS fault lookup walks this code step by step with the pass/fail measurements, wiring schematics and procedures that go with it, and it works offline in the bay.
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- Hughes Power Watchdog PWD30-EPO / PWD50-EPO Manual (ManualsLib web transcription of the OEM guide)Hughes Autoformers (via ManualsLib)
- Power Watchdog (Hughes Autoformers) - FAQ / Error CodesHughes Autoformers / Power Watchdog
Related codes
- E1Line 1 voltage error - park voltage on line 1 rose above 132 V or…
- E2Line 2 voltage error (50 A units only) - park voltage on line 2 rose…
- E3Line 1 overcurrent - the RV drew more than the unit's amp rating on…
- E5Line 1 and neutral reversed - the park pedestal has a hot and neutral…
- E6Line 2 and neutral reversed (50 A units only) - the pedestal has a…
- E7Missing ground - the source has no ground connection, so a…
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