Progressive Industries EMS-HW50C - Manual (Page 8)

Error Code Chart
E-0 Normal Condition
E-1 Reverse Polarity Condition (hot and neutral wires reversed)
E-2 Open Ground
E-3 Line 1 Voltage High (Line voltage above 132)
E-4 Line 1 Voltage Low (Line voltage below 104 volts)
E-5 Line 2 Voltage High (Line voltage above 132)
E-6 Line 2 Voltage Low (Line voltage below 104 volts)
E-7 Line Frequency High (Line frequency above 69 cycles
per second)
E-8 Line Frequency Low (Line frequency below 51 cycles
per second)
E-9 Data Link Down
E-10 Replace Surge Protector Module
NOTE: If the EMS cuts the power to the RV it will show a PE
code following the E code. This denotes the previous error or
why the EMS shut down. Example: The EMS cuts power for
low voltage on Line 1, and then the power is restored. The Error
Code reads E0, but the PE code reads PE4 which tells the user
low voltage was the reason for the EMS previously cutting power.
This PE error code will be deleted when power is disconnected
from the EMS.
Accidental 240 Volt Protection:
Should this condition occur, the display will read 240 volts instead
of displaying the voltage and the error code message will read E-3.
AC power will shut down instantly. DO NOT UNDER ANY
CIRCUMSTANCES BYPASS THE EMS; OTHERWISE,
THIS WILL RESULT IN SEVERE DAMAGE TO THE RV
.