User Manual

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INSTRUCTION MANUAL: ELECTRICAL MANAGEMENT SYSTEM (EMS)

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 ashes 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 (EMS-LCHW30): 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-LCHW50): 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 E 10. 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.

• Open Ground Protection: If AC power has an open ground condition, the EMS will

read an error code of E 2, 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 o power instantly. The display will read the

voltage and E 3 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: 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.