Product Manual

Operation
14 900-0198-01-00 Rev A
DC and AC Voltages
The FX inverter requires batteries to operate
. Other sources may not maintain DC voltages that are
consistent enough for the inverter to operate reliably.
CAUTION: Equipment Damage
Do not substitute other DC sources in place of the batteries. High or irregular voltages
may damage the inverter. It is normal to use other DC sources with the batteries and
the inverter, but not in place of the batteries.
The following items will affect the inverter’s operation. These are only used when the inverter is
generating AC power on its own.

Low Battery Cut-Out
: This function prevents the inverter from draining the batteries completely. When the DC
voltage drops below a specified level for 5 minutes, the inverter will stop functioning. The MATE3 will give a
Low
Battery V
error. This is one of the error messages described on page 40. It appears as an event on the MATE3
system display.
This function is intended to protect both the batteries and the inverter’s output. (Continuing to invert on a low
DC voltage may produce a distorted waveform.) This item is adjustable.

Low Battery Cut-In
: The recovery point from Low Battery Cut-Out. When the DC voltage rises above this point
for 10 minutes, the error will clear and the inverter will resume functioning. This item is adjustable.
 Connecting an AC source for the inverter to charge the batteries will also clear a low battery error.

Output Voltage
: The AC output voltage can be adjusted within a limited range.
NOTE:
The inverter’s output frequency is 60 Hz. This is not adjustable.

The inverter is also controlled by a high battery cut-out limit. If the DC voltage rises above this limit, the inverter
immediately stops functioning and gives a
High Battery V
error. The shutdown protects the inverter from
damage due to excessive DC voltage.
 The high battery cut-out voltages for each model are shown in Table 16 on page 47. This voltage is not a changeable
set point.
 If the voltage drops below this point, the inverter automatically recovers.
 This is one of the errors on page 40. It appears as an event on the MATE3 system display.
The low battery and high battery functions are summarized in Table 16 on page 47.
Search
An automated search circuit is available to minimize the power draw when no loads are present. When
enabled, the inverter does not always deliver full output. The output is reduced to brief pulses with a
delay between them. These pulses are sent down the output lines to see if a resistance is present.
Basically, the pulses “search” for a load. If a load is detected on the output, the inverter’s output increases
to full voltage so that it can power the load. When the load is turned off, the inverter “goes to sleep” and
begins searching again.
Search mode sensitivity is adjusted with the
Sensitivity
menu item. See the menu tables, which begin on
page 53, for the location of this item. The sensitivity is adjusted in small increments which are measured
in fractions of one ampere.
V
V