Owner`s manual

The system measurement information is displayed on the LCD “Display” panel. Switch SW3 is pushed down (or up)
to scroll the LCD’s screens for more information. Individual inverter module has only one control, an ON/OFF circuit
breaker, located at the upper left corner of the front panel. This breaker is used to energize (or de-energize) the
inverter module.
Note: The module circuit breakers must be turned on prior to turning the system output voltage on.
LCD Readout
The LCD unit displays two lines (out of a total of seven lines) of information at a time. Each line can be scrolled
up (or down) independently by toggling switch SW3. Typical seven lines of information are shown below:
Line 1 INV: off normal Inverter off/on
Line 2 BYP: static normal Static bypass on/normal operation
Line 3 LOAD: 120V 100% Load % on nominal
Line 4 AC IN: 120V 60 Hz AC input voltage/frequency
Line 5 DC IN: 48.0V 073.5A DC voltage/DC current
Line 6 LOAD: 03000 W 025.0A Load Power (W)/Current (A)
Line 7 INV: 1 of 6 60 Hz Inverter(s) in operation/frequency
1.5 Remote Alarm
The system provides three alarm signals, namely, Utility alarm, Minor alarm, and Major alarm.
5.1 Utility alarm – Utility alarm is ON when utility input voltage is lost/out of tolerance.
5.2 Minor alarm – The system sends out this signal to indicate something is not functioning properly, but inverter
can still maintain the load.
5.3 Major alarm – Whenever load is lost power and the system is energized.
For alarm connection, see Table 1-4.
Alarm Relays
There are three alarm relays. All relays are “form C” type, that is, the relay has a normally open and a normally
closed contact set.
The “Major Alarm” relay will be energized when the system is operating properly, that is, power is being supplied to
the load either from the Inverter or from the Utility. There are two sets of “form C” contact sets on the “Major Alarm”
relay.
The “Minor Alarm” relay will be de-energized, and will be energized for the “alarm” condition. A “Minor” alarm will
be issued if the system is not operating properly. Such an alarm will be issued during over load, battery voltage not
within specified limits, power modules over temperature and module fault.
The “Utility Alarm” relay will be de-energized during normal operation and will be energized for the “alarm” condition.
This alarm will be issued if the utility voltage is not within specified limits or the input frequency is not within proper
limits.
The table below shows the “alarm” and the “non-alarm” terminal block connections. This terminal block is located
in the top, left side of the receiver cabinet. The small front panel must be removed to gain access to the terminal
block.
Owner’s Manual
Introduction page 1 — 5