Progressive Industries
EMS
Electrical Management System
Installation Guide
and
Operating Instructions for:
Model EMS-LCHW30
Rated at 120V/30A
Manufactured by:
Progressive Industries, Inc.
414B Airport Boulevard
Morrisville, NC 27560
(919) 462-8280
Proudly manufactured in the U.S.A.
Features
High/Low Voltage Protection
Whenever AC power falls below 104 volts, or rises above 132 volts, the EMS automatically
shuts down power to the RV. The EMS will monitor the power and once the AC power rises
above 104 volts, or drops below the 132 volt level, the time delay indicator flashes for the preset
time and then automatically restores power to the RV.
Time Delay for A/C Compressor
If AC power is interrupted, or the EMS detects a fault condition, the built-in time delay is
activated. There are two settings on the EMS: one is 136 seconds (02:16), and the other is 15
seconds. Consult your air conditioner manual to see if it has a time delay built in. If so, use the
15 second delay; if not, use the 136-second delay. The factory setting is 15 seconds.
3 Mode surge protection
This feature provides full surge protection L-N, L-G, and N-G. Total Joule rating is 1790, and
surge current is 44,000. Response time of <1 nano second.
Surge Indicator
In the event of a power surge and the surge protector circuit is damaged within the EMS, L-N or
L-G, the digital display error code will read E-10. This indicates that the EMS needs to be
serviced.
Reverse Polarity Protection
If AC power is a reverse polarity condition, the EMS will not allow power to the RV and the
error code will read E1.
Open Neutral Protection
If the AC power has an open neutral condition, the display will not light, and power will not be
allowed to the RV.
Open Ground Protection
If the AC power has an open ground condition, the EMS will read an error code of E2, and
power will not be allowed to the RV.
AC Frequency Protection
If AC power frequency deviates plus/minus 9 hertz from 60 cycles per second, the EMS will
shut down AC power. An Error Code of E7 will be displayed when the frequency is high; and
an Error Code of E8 will be displayed when frequency is low.
Accidental 240V protection
If 240 volts is detected when plugging into AC power, the EMS will
NOT
allow power to the
RV. If this condition occurs while power is applied to the RV, the EMS shuts off power
instantly. The display will read the voltage and E3 for the error.
(NEVER BYPASS THE EMS
WHEN THIS OCCURS.)
Display
Continuously scrolls the AC power information, including voltage, current, frequency, error
codes, and previous errors. Each reading is displayed for two (2) seconds.
Previous Error Code
This feature tells the user what the previous error was and why power was interrupted to the RV.
To read a Previous Error code, put a “P” in front of the “E” code. This is only displayed if an
actual error occurs. The error is deleted when the power is disconnected from the EMS.
Bypass
Enclosed blue jumper wire
allows the user to bypass the computer circuit in the EMS in the
event of computer failure, thus allowing AC power into the RV. This
does not
disable the surge
protection portion of the EMS; however, all other features are disabled.
Modular Design
Replacement parts are designed for simple plug and play, making repairs extremely user
friendly.
Microprocessor Controlled
The computer and built-in display are driven by state of the art microprocessors that are
programmed with software to drive the entire EMS unit.
