Owner`s manual

Description of Operation
TruSine 4.5 kW Inverter Page 7 Owner’s Manual
2 DESCRIPTION OF OPERATION
2.1 Inverter
The System ON/OFF Switch, located on the front panel, allows the user to turn the system ON and OFF and to
reset the system after a fault. The inverter will always begin operation in the large inverter “high power” mode. If
the AC load is less than 70 watts the inverter will automatically switch to the “low power” high efficiency small
inverter after 5 seconds. The optional TSR-2 Remote Control Panel allows the inverter to be disabled (turned
OFF) while allowing the other system functions (charger, transfer switch) to continue to operate.
The Inverter AC Output Circuit Breaker is a 2 pole, 20 amp breaker marked “O/I” located below the System
ON/OFF Switch. The breaker protects the Inverter AC output and Battery Charger AC input against a severe
overload. This breaker does not protect AC Passthrough Power. If the breaker trips during inverter operation,
the system must be reset. Do this by turning the System ON/OFF Switch OFF and back ON. Do not use the
AC Output Circuit Breaker as an ON/OFF switch.
Protective Interlocks
Auto-restart After shutting down for any of the following fault conditions the inverter will try to restart
itself every 5 minutes. The inverter will restart if the fault condition is no longer present.
Manual restart Manually restart the system by resetting the inverter after the fault conditions is removed.
Reset the inverter by turning the System ON/OFF Switch OFF and then ON.
Low Battery The inverter continually monitors battery voltage. If battery voltage falls below the Low
Battery Shutdown setpoint the inverter will shut OFF. Auto-restart will restart the inverter
after battery voltage rises above the Low Battery Warning setpoint.
High Battery The inverter will shut OFF if battery voltage rises above the High Battery setpoint.
Over Temperature The inverter will shut OFF if internal temperature sensors detect a high temperature
condition that would damage the inverter.
While operating in Solar Mode a high temp shutdown will transfer back to shore power until
the over-temperature condition clears.
Over Load - If a short circuit or an overload is applied to the inverter’s output the inverter will shut down.
Additional details regarding protective interlocks are found in the Alarm Menu in section 3.
Load Demand
The TruSine Inverter’s Load Demand Mode is an energy-saving feature. Load Demand allows the inverter to go
to sleep when the AC load is below the ‘Enter Load Demand’ (watts) setpoint for 5 seconds. While in Load
Demand (asleep) the inverter produces only pulses of AC which are used to search for an AC load. When the
inverter senses an AC load greater than the ‘Exit Load Demand’ (watts) setpoint, the inverter will turn fully ON.
The Load Demand feature significantly reduces the DC amps drawn from the battery while the AC load is below
the Load Demand enter and exit setpoints.
The inverter will not enter Load Demand from the High Power mode. The inverter will only enter Load Demand
from the 70 watt small inverter Low Power mode.
The ‘Enter Load Demand’ and ‘Exit Load Demand’ setpoint values may be adjusted to suit the AC loads by
using the optional TSR-2 Remote Control. The Load Demand feature may be turned OFF by selecting Load
Demand enabled/DISABLED. This is recommended if very small AC loads under 5 watts, such as clocks or
LCD displays, must be operated.
2.2 Battery Charger
The battery charger’s advanced design incorporates an automatic, multi-stage charger. This design enables