INCORPORATED
®
Installation
ITC-Series
Inverter
Page 13
Owner‟s Manual 10/7/05
DESCRIPTION OF OPERATION
Inverter
The System ON/OFF Switch, located on the front panel, allows the user to turn the system power ON and OFF
and to reset the system after a fault.
The Charger ON/OFF and Inverter ON/OFF buttons, located on the Control/Display Unit enable or disable the
Charger or Inverter Functions. The corresponding light next to Inverter/Charger buttons will be steadily on
when the unit is in the Inverter or Charger mode. These Inverter and Charger lights will blink if the mode is not
currently on, but are enabled (Example: The Inverter light will blink when the Inverter is Enabled, the ITC is
plugged into the utility, and the Charger is Active).
The Inverter AC Output Circuit Breaker is a 1 pole, 30-
amp breaker marked “CB-2” on the front unit. The CB-2
breaker protects the Inverter AC output and a second Breaker (CB-1) protects the Battery Charger AC input
against a severe overload. This CB-1 breaker also protects AC Pass through Power. If this CB-1 breaker trips
during charger operation, it must be reset.
Inverter Protective Interlocks
The Inverter operation is protected by a series of safety interlocks that protect against most failures such as
overloads, over-temperature conditions or other conditions where the unit may be asked to operate outside
safe battery voltages. These faults will tr
igger a display of the “Fault” and or “Overload” Lights on the
Control/Display panel and are listed below:
Low Battery
The inverter continually monitors battery voltage. If battery voltage falls below the Low
Battery Shutdown 10.5 (21.0) VDC setpoint the inverter will shut OFF. Auto-restart will
restart the inverter after battery voltage rises above the Low Battery Warning 11.0 (22.0)
VDC setpoint (after 5 minutes).
High Battery
The inverter will shut OFF if battery voltage rises above the High Battery 16.0 (31.0) VDC
setpoint.
Over Temperature The inverter will shut OFF if internal temperature sensors detect a high temperature
condition that could damage the inverter.
Over Load
If a short circuit or an overload is applied to the inverter‟s output the inverter will shut down.
Battery High
The unit has shut down due to the Battery voltage is above High Battery Shutdown setpoint
of 16.0 (31.0) VDC.
Battery Low Warn. Battery voltage is below Low Battery Warning setpoint and soon may reach Low Battery
Shutdown setpoint of 10.5 (21.0) VDC.
Current Limit
Inverter AC output current is at the Maximum Current allowed and is presently in “Surge”.
The AC voltage will decrease if load increases. Overload Shutdown will occur if voltage
goes below 105VAC for 3 second.
Overload
Inverter has shut down due to overload. High AC load caused inverter output voltage to fall
below tolerance for three seconds.
Hardware Fault
Internal protection circuit activated or power brick high temperature will shut down system.
Overheat
The SCR plate or power brick overheating will cause the system to shutdown.
If the unit has faulted there are the two following options:
1. Auto-restart
After shutting down for any of the above fault conditions, the inverter will try to restart itself
every 5 minutes if Auto-Restart is Enabled and the fault condition no longer exists.
2. Manual restart
You can manually restart the system after the fault conditions are removed. Reset the
inverter by turning the System ON/OFF Switch OFF and then ON.
