Progressive Industries EMS-HW50C Owner's manual

Electrical Management System (EMS)
EMS-HW30C & EMS-HW50C
Installation & Operating Guide for:
Model EMS-HW30C
Rated at 120V/30A
and
Model EMS-HW50C
Rated at 240V/50A
“Surgio Says”
Lifetime Warranty on
all EMS & SSP Surge
Protection Models

1
Features
High/Low Voltage Protection | Whenever AC power lowers
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-seconds delay. The factory
setting is 15 seconds.
3-Mode Surge Protection (EMS-HW30C) | This feature
provides full surge protection L-N, L-G, and N-G. Total Joule
rating is 1,790J and 44,000A surge current. Response time <1
Nano second.
5-Mode Surge Protection (EMS-HW50C) | This feature provides
full surge protection L-N, L-N, L-G, L-L, and N-G. Joule rating is
3,580J and 88,000A surge current. Response time <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 error code will read E10. This indicates the EMS needs to
be serviced.
Reverse Polarity Protection | If AC power has a reverse polarity
condition, the EMS will not allow power to the RV and the error
code will read E 1
Open Neutral Protection |
If AC power has an open neutral, the display will not light and the
EMS will not allow power to the RV.

2
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 E 7 will be displayed when
the frequency is high; and an Error code of E 8 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)
Remote 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 | Previous error code (PE) indicates what
error occurred and why power was interrupted. To delete code,
disconnect power from EMS.
ByPass | This switch is located on the remote display and allows
the user to bypass the EMS in the event of 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 remote display
are driven by state-of-the-art microprocessors that are programmed
with software to drive the entire EMS unit.

3
Warnings
• RV wiring is different than house wiring; in an RV, neutral and
ground conductors are isolated whereas in a house they are bonded
at the service panel. Therefore; never connect neutral and ground.
The result will cause a ground fault condition, electric shock, and/or
a fire hazard. This does not stop you from using a “generator plug”
that ties together neutral and ground as this is perfectly safe.
• Do not exceed the rating on the EMS for any reason. These
devices are designed to be reduced down to 120V/15A and
maintain full protection.
• Do not modify the EMS in any way as 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 the AC receptacle is providing a
weak connection. Should this condition exists, DO NOT USE
as it could result in possible melting of the RV power plug.
• Progressive Industries recommends you have a certified
electrician or an authorized dealer perform the installation of the
EMS unit.
• All AC power extension cords in conjunction with your EMS unit
should be rated 10 gauge for 120V, 30A systems or 6 gauge for
240V, 50A systems and rated for outdoor use to reduce the risk
of electrical shock. We recommend the length not to exceed
20-25’. Small gauge cable will have a higher resistance and can
result in voltage loss or an electrical fire.
• Whenever servicing or installing the EMS, or any other AC
powered device, make sure AC power is disconnected.
• Never solder the ends of the wires you attach during installation,
this includes any red, black and/or white wires

4
Installation Instructions Before Transfer Box
HW50C Visual Photo Library page 11 | Wiring Diagram on page 13
HW30C Visual Photo Library page 12 | Wiring Diagram on page 13
For installation, in addition to the EMS Kit, you will need:
• 4 mounting screws
• In some cases you will need a jumper cable, length to be
determined based on the placement of the EMS
•Always use #10 wire for the HW30C & #6 wire for the HW50C.
1. Unplug RV from AC power and be sure generator is off.
2. Determine a location for the EMS control box.
3. Cut the RV power cord about three (3) inches greater than the
distance from the junction box to the desired location of the EMS
control box. Then strip back the outer insulation three (3) inches on
input, and three (3) inches on output cable. (See visual references on
pages 11-13).
4. Strip back each conductor 3/8” on both stripped ends. (See visual
references on pages 11-13 ) and attach ring terminals to green
ground wires. If this wire is a solid wire, do not use ring terminals.
Loop the wire around the ground screw.
5. Remove the lid from the EMS. Inside the unit will be a display,
cable and pack of screws. Back off the six set screws from top
of contactor (L1, L2, etc.)
6. Take your long cable with the plug end and connect it to the input
side by sliding through the wire restraint on the end of the EMS
control box. Next connect the wires to the contactor by attaching
the black wire to L1, white to L2, red to L3, and green to ground
screw on side of box. (See visual references on pages 11-13).
Torque down set screws and ground nut to secure connections.
7. Take the short cable coming from the junction box by sliding it
through the wire restraint output side of the EMS control box. Next
slide the black wire through the current sensor containing the green
tape and connect to T1, then connect the white wire to T2. Now
slide the red wire through the other sensor and attach to T3. The
arrow side of the sensor needs to face T1 and T3.
[Continued on page 5]

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Installation Before Transfer Box continued
Attach the green ground wire to the ground screw on side of box.
(See visual references on pages 11-13). Make sure the wire colors
match up adjacent to each other. Torque down set screws and
ground nut to secure connections.
8. Double check all connections and make sure they are secure.
9. Remove the two screws on contactor where marked L1, L2, etc.
Next remove the top plastic plate with markings. Examine inside
ensuring there are no loose plastic pieces inside the contactor. If
so, remove and re-install cover with two screws. (See visual
references on pages 11-13).
Do not over tighten screws as this could break cover tabs.
Caution: If you break off a tab and do not remove it, this may
stop the contactor from working and allow 240 volts in the RV.
10. Secure cable ends by tightening down strain reliefs over the
input and output wires. Do not over tighten as this could bit
through the insulation and cause a short.
11. Set time delay jumper on the circuit board. The factory setting
is for 15 seconds. Remove jumper to set for 136 seconds
(02:16). See Features Section on time delay to determine
which to use. (See visual references on pages 11-13).
12. Plug in remote display and cable. (This cable is not a phone
cable, but rather a data cable).
NEVER PLUG IN DISPLAY WHILE RV POWER IS ON.
13. Attach EMS lid with the six black machine screws provided.
14. Mount the EMS control box.
15. Installation is complete. Next, plug in and follow operating
instructions.

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HW50C Visual Photo Library on page 11 | Wiring Diagram on page 13
HW30C Visual Photo Library on page 12 | Wiring Diagram on page 13
For installation, in addition to the EMS Kit, you will need:
• 4 mounting screws
• In some cases you will need a jumper cable, length to be
determined based on the placement of the EMS
•Always use 10 wire for the HW30C & #6 wire for the HW50C.
1. Unplug RV from the AC power and be sure generator is off.
2. Locate transfer switch box; determine where the EMS control box
will be mounted.
3. Measure the distance between the transfer switch and the control
box and add one (1) foot. This is the length of cable that will be
required for the installation. Make sure 6-gauge, 4 conductor
cables are used.
4. Remove lid from transfer box, disconnect and remove the output
cable.
5. Take jumper cable and strip back one end three (3) inches and the
other end the same as the end removed from the transfer box. The
cable removed from the transfer box must have at least three (3)
inches of the outer insulation removed. (See visual references on
pages 11-13).
6. Strip back all conductors 3/8” and attach ring terminals to green
ground wires. (See visual references on pages 11-13). If this wire
is solid wire, do not use ring terminals. Loop the wire around the
screw.
7. Remove the lid from unit. Inside the unit will be a digital display,
cable and pack of screws. Back off the six set screws from top of
contactor. (L1, L2, etc.)
8. Take the jumper cable and connect it to the input side by sliding
through the wire restraint on the end of the EMS control box and
then connect the black wire to L1; white to L2; red to L3, green to
ground screw. (See visual references on pages 11-13). Torque
down set screws and ground nut to secure connections.
[Continued on page 7]
Installation After Transfer Box for
Protection from both Generator and AC Power

7
9. The cable that came from the transfer box connects to the output
side of the EMS control box in the same manner. Next slide the
black wire through the current sensor containing the green tape
and connect to T1 and then connect the white wire to T2. Now
slide the red wire through the other current sensor and attach to
T3. The arrow side off the sensor needs to face T1 and T3. Next,
attach the green ground wire to the ground screw on the side of
box. (See visual references on pages 11-13). Make sure the
conductor’s colors match up across from each other. Torque
down the set screws and ground nut to secure connections.
10. Connect the loose end of the jumper cable to the transfer switch.
See wiring diagram on transfer switch if needed.
11. Double check all connections to ensure they are secure.
12. Secure cable ends by tightening down strain reliefs over the input
and output wires. Do not over tighten as this could bite through
insulation and cause a short.
13. Set time delay jumper on the circuit board. Factory setting is for
15 seconds. Remove jumper to change setting to 136 seconds
(02:16). See Features Section on time delay to determine which to
use. (See visual references on pages 11-13).
14. Plug in digital remote and data cable. (This cable is not a phone
cable, but rather a data cable.)
NEVER PLUG IN THE DISPLAY WHILE RV POWER IS
ON.
15. Attach lid with the six black machine screws provided and attach
transfer switch lid.
16. Mount the EMS control box.
17. Installation is complete. Next, plug in and follow operating
instructions.
Installation After Transfer Box for
Protection from both Generator and AC Power
continued from page 6

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Operating Instructions
1. Plug into A/C power.
2. Digital display will read 888 for one second and then begin
scrolling the voltage, amps, line frequency and error code, if any.
In addition, the time delay light will flash while the EMS is going
through its countdown and will stop when the unit engages
(bottom right hand corner.) If delay light does not flash, a fault
condition is present. Refer to the Error Code Chart (page 9) to
determine the problem with the AC power.
3. You may notice when first plugging in, the display may read
E 9. This indicates the display has not received the data from the
computer yet. Do not be alarmed, this is normal. By the next
scroll through, it should read E 0 if the AC power is normal.
4. The digital display will give you a three digit number indicating
your line voltage. Next, it will give you an “0A” reading
indicating the current (amps). The current (amps) will read zero
until the time delay is complete (136 seconds or 16 seconds,
depending on your settings). Next the unit will indicate a number
between 0 and 50 which indicates how many amps the RV is
drawing. The next number indicates your line frequency . This
number should be “60H” and should remain fairly consistent;
however, it may read plus/minus one or two. Lastly, note the E
code. E 0 is normal and only when E 0 or E10 is present will the
delay light flash and allow power to the RV. Refer to the Error
Code Chart card that was provided with your unit or see the Error
Code Chart (page 9) for additional information.
5. Set up will be complete when the Error Code E 0 is displayed.
IMPORTANT: The display will only read voltages between
approximately 78 volts and 255 volts.
NOTE: If the wiring reads anything different than correct, the EMS
will not turn on and we recommend you move to a different source
of AC power or use your generator power. Also, if power is below
104 volts or above 132 volts, the EMS will not turn on, and we
recommend using your generator power.

9
Error Code Chart
E 0 - Normal Operating Condition
E 1 - Reverse Polarity (hot and neutral wires reversed)
E 2 - Open Ground (no ground wire connection)
E 3 - Line 1 High Voltage (line voltage above 132V)
E 4 - Line 1 Low Voltage (line voltage below 104V)
E 5*- Line 2 Voltage High (Line voltage above 132V)
E 6*- Line 2 Voltage Low (Line voltage below 104V)
E 7 - Line Frequency High (line frequency above 69Hz)
E 8 - Line Frequency Low (line frequency below 51Hz)
E 9 - Data Link Down (call technical support)
E10 - Replace Surge Protector Module (call Progressive
Industries Tech Support)
* Code only apply to EMS-HW50C models
Note: PE is a previous error code that HAS BEEN RECTIFIED.
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 E 0, but the PE code reads PE 4 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 AS THIS WILL RESULT IN SEVERE
DAMAGE TO THE RV.

10
Troubleshooting Guide
Common installation mistakes:
1. Check connections. See diagram on pages 11 & 13 for the HW50C
and diagram on pages 12 & 13 for the HW30C.
HW50C: Input is the plug side of the RV and black should be attached
to L1, white to L2 and red to L3. Output (going to the RV) should
match up. T1 black, T2 white and T3 red. The green ground gets
attached to the input and output on the side of the box.
HW30C: Input is the plug side of the RV and black should be attached
to L1, white to L2. Output (going to the RV) should match up. T1 is
black, T2 white. The green ground gets attached to the input and output
on the side of the box.
2. Make sure the input wires are, in fact, the input wires. Connecting the
output to the input of the EMS will cause the device to malfunction.
3. If the EMS is still not functioning at this point, follow instructions
below prior to calling Progressive Industries Technical Support.
In order for the on-call Technician to help troubleshoot the
problem(s) you are experiencing and render the best possible
solution, it is necessary you be at your RV when you place your call.
1. If the display is illuminated and scrolling information, note the Error
Code. If there is an Error code of 1-9, the device will interrupt the
power. See Error Chart for definition of AC power problem. The
device being off when an Error Code is present indicates the product
is working properly and protecting your coach.
2. If the display is illuminated and reading Error code E 0, and yet no
power is present in the coach, please contact Progressive Industries
Tech Support. You must wait for the time delay light to stop flashing.
3. If the display is not illuminated and power is in the coach there is a
connection issue between the display and the main control box.
Contact Technical Support.
Our Tech Support Team can only assist you if the above informa-
tion is provided; therefore, it is necessary for you to be at the RV
when you place your call. To recap...
1. Are the connections correct?
2. What is the Error Code message being displayed?
3. Is the delay indicator flashing?

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Photo Library for the EMS-HW50C

12
Photo Library for the EMS-HW30C

13
Wiring Diagram for EMS-HW30C
Wiring Diagram for EMS-HW50C
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