Product Manual

6
OPERATING INSTRUCTIONS
The LVD unit monitors the battery voltage and disconnects the DC load when the battery voltage falls below
the set disconnect point, preventing further discharge and possible damage. Once the set disconnect point has
been reached, a 60 second delay will occur prior to disconnection allowing for short periods of low voltage
eg engine starting. Once the battery is recharged and the battery voltage is above 13V the DC load will
automatically be reconnected. The LVD can also be reconnected manually prior to reaching 13V by pressing
the reset button.
SETTING VOLTAGE DISCONNECT POINTS
The LVD allows you to set the voltage disconnect point of your unit to best suit your application. Disconnect
points are set by applying the jumper pins provided to the jumper connection points at the back of the unit.
The table below illustrates the 4 disconnect points that can be set by applying the jumper pins in the
following sequences:
DISCONNECT POINT JUMPER CONNECTION ILLUSTRATION
LEFT RIGHT
10V N/A N/A
10.5V (default) Pin installed N/A
11V N/A Pin installed
12V Pin installed Pin installed
OVERLOAD
In the event your LVD unit exceeds its maximum operating temperature the LVD will disengage and the LED
on the front of the unit will flash red. Once the LVD has reached a safe operating temperature the LED will
illuminate solid red indicating the load is disconnected. When the battery reaches above 13.0V, the LED on
the front of the unit will then flash green (Check Load) indicating that the LVD has reconnected. You can reset
the device at any stage by pressing the reset button on the front of the unit.
An overload situation will occur due to excessive current draw being placed on the LVD unit, if the Check
Load LED illuminates it is advised to check the load which has been connected to the LVD unit to ensure
it is best suited to the model of LVD chosen for your application.
FUSE FAILURE
If your LVD unit displays a green & red flashing LED this will be indicating a fuse failure. To replace the fuses
remove the screws from the bottom of the unit and remove cover. Remove and refit with 30A blade fuses.
Refit the bottom cover of your LVD unit.
LVD30-LVD50 Instruction Manual 7-9-11_Layout 1 7/09/11 4:57 PM Page 7