OPERATION
Page 24
Powering on the loads
After the inverter is switched on, it takes a finite time for it to become ready to deliver
full power. Hence, always switch on the load(s) after a few seconds of switching on the
inverter. Avoid switching on the inverter with the load already switched on. This may
prematurely trigger the overload protection.
When a load is switched on, it may require initial higher power surge to start. Hence, if
multiple loads are being powered, they should be switched on one by one so that the
inverter is not overloaded by the higher starting surge if all the loads are switched on at
once.
Switching the inverter on / off
Before switching on the inverter, check that all the AC loads have been switched off.
The on / off switch (2) on the front panel of the inverter is used to switch on and switch
off the inverter. This switch operates a low power control circuitry which in turn controls
all the high power circuitry.
CAUTION!
Please note that this switch is not switching the high power battery
input circuit. Parts of the DC side circuit will still be alive even
when the switch is in the off position. Hence, disconnect the DC and
AC sides before working on any circuits connected to the inverter
When the inverter is switched on, the green LED indicator (3) will be lighted. This LED
indicates that the inverter is operating normally. Under normal operating conditions, AC
output voltage will now be available at the output receptacles.
Switch on the AC load(s). The green LED should remain lighted for normal operation of
the load.
Temperature controlled cooling fans
The cooling fans are thermostatically controlled. Temperature of a critical hot spot inside
the inverter is monitored to activate the fans and the over temperature shut-down. When
the temperature of this hot spot reaches a specified value, the fans are switched on. The
fans will be automatically switched off once the unit cools down.
Please note that the
fans may not come on at low loads or if the ambient temperature is cooler. This is
normal.
Indications for normal operation.
When the inverter is operating normally and supplying AC load(s), only the green LED
(3) will be lighted. In case of abnormal operation, other displays and alarms will be
activated. Please see under
“Protections Against Abnormal Conditions” on page 25.
