Progressive Industries, Inc.
Electrical Management System
Operating Instructions for:
Model EMS-PT50C
Rated at 120V/50A
Manufactured by:
Progressive Industries, Inc.
414B Airport Boulevard
Morrisville, NC 27560
(919) 462-8280
www.progressiveindustries.net
Proudly manufactured i n t he U.S.A.
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
indictor 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 is a 136-second (02:16) time delay.
5 Mode Surge Protection
This feature provides full surge protection L-N, L-N, L-G, L-L and NG. Total Joule
rating is 3,580, 88,000A surge current. 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 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 AC power has an open neutral condition, the display will not light, and the EMS will
not allow power to the RV.
Open Ground Protection
If 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 E-3 for the error. (NEVER
BYPASS THE EMS WHEN THIS OCCURS.)
Display
Continuously scrolls all of 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 power is
disconnected from the EMS.
Weather Resistant
Can be exposed to the elements, however, may not be submerged.
Microprocessor Controll ed
The computer is driven by a state-of-the art microprocessor that is programmed with
software to drive the entire EMS.
Built-in Lock Bracke t
Allows the user to secure the EMS to power source to prevent theft.
Features
Warnings
Do not exceed the rating on the EMS for any reason,
•
however, these devices are designed to be reduced down to
120V/15A, and still maintain full protection.
• Do not modify the EMS in any way, this will void the
warranty, compromise protection, and could result in
possible shock, and/or a fire hazard.
• It is important to always check the pedestal power outlet for
charring; this condition means that the AC receptacle is
providing a weak connection. DO NOT USE! It could
result in possible melting of the RV power plug.
•
When running extension cords from the RV to AC power,
always use a 6-gauge cable for your 240V, 50 Amp system.
Make sure that the cable is rated for outdoor use to reduce
the risk of electric shock. Small gauge cable will have a
higher resistance and will result in a voltage loss, plus it
may result in an electrical fire.
Whenever servicing or installing the EMS or any other AC
•
powered device, make sure AC power is disconnected.
RV wiring is different than the wiring found in homes; the
•
neutral and ground conductors are isolated in the RV,
unlike in a home where they are tied together at the service
panel. The reason is: homes have a bonded ground
system, whereas RV’s do not. Therefore, never bond the
neutral and ground together for any reason. This will
create a ground fault condition, and may result in electric
shock and/or a fire hazard.
• Never plug the EMS into an inverter.
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