Fault codes / Progressive EMS / E-2
Progressive EMS code E-2
What it means: Open ground.
What to check
Meter hot to ground at the pedestal. 0V means no ground path and the EMS will not pass power. Check the adapter and cord ends for a broken ground pin before blaming the park.
Tech detail
A coach with E-2 on every pedestal has a bad ground pin or a broken ground in its own cord or inlet.
Learn the system
- Shore power: 30A vs 50A
- Breakers, GFCIs and the EMS
- The lost neutral (50A danger)
- Transfer switches and generator power
Practice it on a service call
Guided diagnosis
Other Progressive EMS codes
- Progressive EMS code E-0 Normal, power passing
- Progressive EMS code E-1 Reverse polarity: hot and neutral swapped
- Progressive EMS code E-3 Line 1 high voltage, above 132V
- Progressive EMS code E-4 Line 1 low voltage, below 104V
- Progressive EMS code E-5 Line 2 high voltage, above 132V (50A only)
- Progressive EMS code E-6 Line 2 low voltage, below 104V (50A only)
- Progressive EMS code E-7 Frequency high, above 69 Hz
- Progressive EMS code E-8 Frequency low, below 51 Hz
- Progressive EMS code E-10 Surge module used up
- Progressive EMS: Display dark, no power Open neutral (no code for it)
- Surge Guard: Open ground No ground at the pedestal or in the cord
- Surge Guard: Reverse polarity L1 or L2 landed on neutral or ground
- Surge Guard: L1 high / L2 high Above 136V on that leg
- Surge Guard: L1 low / L2 low Below 102V on that leg
- Surge Guard: L1 amps / neutrip Current over 110% on a leg, or neutral over 130% (50A)
- Surge Guard: Recept overheat Plug or receptacle running hot
- Surge Guard: GND high Voltage on the ground conductor
- Surge Guard: Open neutral Neutral lost on the coach side
- Surge Guard: Replace surge Surge protection expended
Full field guide: Progressive Industries EMS and Surge Guard
Codes come from the maker manuals and public service sheets. Your model's own chart always wins, and LP and 120 volt work belongs to a qualified technician.