Conext XW PRO 6848 6,800W 48V Installation

Inverter Applications
The Conext XW Pro performs differently depending on the AC loads connected to it. If
you are having problems with any of your loads, read this section.
Resistive Loads
Resistive loads are the easiest and most efficient to drive. Voltage and current are in
phase, which means they are in step with one another. Resistive loads generate heat in
order to accomplish their tasks. Toasters, coffee pots, and incandescent lights are
typical resistive loads. It is usually impractical to run larger resistive loads—such as
electric stoves and water heaters—from an inverter due to their high current
requirements. Even though the inverter may be able to accommodate the load, the size of
battery bank will limit inverter run time.
Motor Loads
Induction motors (AC motors without brushes) require up to six times their running
current on startup. The most demanding are those that start under load (for example,
compressors and pumps). Of the capacitor start motors (typical in tools such as drill
presses and band saws), the largest you can expect to run is 1horsepower. Universal
motors are generally easier to start. Check that the Locked Rotor Amps (LRA) rating of
the motor load does not exceed the maximum surge current rating of the inverter. Since
motor characteristics vary, only testing will determine whether a specific load can be
started and how long it can be run.
If a motor fails to start within a few seconds or loses power after running for a time, it
should be turned off. When the inverter attempts to start a load that is greater than it can
handle, the inverter may shut down from an AC overload fault.
Problem Loads
Very Small Loads
If the power consumed by a device is less than the threshold of the search mode
circuitry, and search mode is enabled, the inverter will not run. Most likely the solution
will be to disable Search mode or lower the sense threshold (see "Inverter Settings" on
page55).
Fluorescent Lights and Power Supplies
Some devices cannot be detected when scanned by search mode circuitry. Small
fluorescent lights are the most common example. Some computers and sophisticated
electronics have power supplies that do not present a load until line voltage is available.
When this occurs, each unit waits for the other to begin. To drive these loads, either a
small companion load like a light bulb rated for more than the Search Watts setting
must be used to bring the inverter out of search mode, or the inverter may be programmed
to remain on by disabling search mode (see "Inverter Settings" on page55).
Troubleshooting Conext XW Pro Owner's Guide
990-91227A-01 This document is intended for use by qualified personnel 103