TROUBLESHOOTING GUIDE
For technical assistance, please call 1-800-780-4324 x 20311
Manufactured by Southwire Company, LLC, 5250 140th Avenue North, Clearwater, Florida 33760
© 2017 Southwire Company, LLC. All rights reserved. * Trademark of Southwire Company, LLC. Registered in the United States.
Surge Guard devices protect your watercraft from low quality or incorrect shore power.
Normally shore power should be around 115 –120 Volts AC from L1 or L2 to Neutral, or 240V from L1 to L2. When power
falls too far outside this range, it represents a poor or hazardous condition to your watercraft’s electrical system. Surge Guard
devices provide protection to your watercraft by turning off power when the line voltages L1 or L2 fall below 102 Volts AC or
goes above 132 Volts AC.
These devices also protect your electrical system from a reverse polarity condition which indicates that the hot and neutral
lines of shore power are swapped or reversed. This can be hazardous to equipment and safety. Surge Guard devices will not
connect power to your watercraft until the reverse polarity fault is corrected.
In the event your device is not functioning as expected, perform the following troubleshooting steps to determine and correct
any malfunctions. Note: Testing should be performed with AC units and electrical appliances turned off, then verified with
appliances turned on.
Connect the shore power cord to a 240V, 50A power source. The LCD screen will display “DELAY” for 128 seconds while the
device is monitoring the incoming power. Note that this guide also applies if using 120V, 30A power with a suitable adapter.
PROBLEM
TROUBLESHOOTING STEPS
Watercraft powers up after 128 seconds but then turns off after another
8-10 seconds.
The device may be operating properly, and you may have a low voltage
condition. In this case, turn off as many loads as possible. It is not
safe to operate some equipment with low voltage. Verify that the input
voltage is greater than 102VAC with loads turned on and off.
Watercraft does not power up after 128 seconds after connecting to
shore power.
Check the LCD display and the Caution When Flashing light (Red LCD).
Check voltage with voltmeter at connection.
LCD shows a fault such as L1 or L2 Low or L1 High and the Caution
When Flashing light is blinking.
There could be an open conductor or unsafe power. Check the input
connections, shore power cord, and adapter (if applicable).
L1 and L2 are within range (102 – 132VAC) and there is no power.
Call Southwire Technical Support at 1-800-780-4324.
LCD screen displays “REVERSE POLARITY” and the Caution When
Flashing light is blinking
Shore power connections are reversed and you have an unsafe condi-
tion. In this case, notify your marina of the condition in order to correct
the fault.
A fault occurs such as a low or a high voltage during normal operation
when shore power is within good operating range
The device will turn off power to the watercraft and will display a fault
message on the LCD display. If the power returns to normal, the device
will display “DELAY” on the LCD screen and will wait 128 seconds
before turning power to the watercraft back on.
1. Low Voltage – If the input voltage drops below 102VAC for more than 8 seconds, the power will be removed protecting your electronics.
Thiscondition may be caused by overloading the marina’s power grid. Try reducing your loads. Otherwise, do not operate until power is restored
tosafe levels.
2. High Voltage – If the input voltage increases above 132VAC for more than 8 seconds, power will be removed. In generator mode, check forload
balance. Check the generator’s voltage regulator and adjust to safe operating levels.
3. Line 1, Line 2, or Neutral Open – Check all input wiring to the Surge Guard. Check the shore power cord and wiring from the generator
ifapplicable. Check/replace adapter if reducing down to 120V, 20A service. Notify marina for shore power problems if applicable.
4. Caution When Flashing Light – If the caution light is on bright, there is high voltage on the ground or neutral wires. If the light is dimly lit, thereis
a low voltage on the neutral wire. It is not uncommon for 2 to 3 volts to be on the neutral wire with respect to ground.
506-00013B
Model 67050
50A Surge Guard* Portable Marine Power
Protection Device with LCD Display
