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Power from battery only
The inverter is built with automatic PV and utility power wakeup feature.
When the power switch is in power off, and qualified PV input, the PV charger will be activated, and the
rest part of the inverter will remain powered off.
In this mode, the utility power can only illuminate the LCD, it can’t charge batteries.
When the inverter shuts off due to low battery voltage, and the switch is kept on “on” position, the inverter
will use qualified utility power or PV power to charge batteries and wake up at “cold start voltage” to
discharge the battery to provide AC output.
If the inverter is set in SOL or SUB, the automatic wake up feature will charge battery close to “Utility to
Battery switch” voltage, and then cut off utility charger, switch to DC to AC model.
2.4.8 Audible Alarm
The inverter also gives audible alarms when the following situations occur.
Warning
Buzzer beeps 0.5s every second.
Error
Long Beep. Beeps 0.5s every 1s for 10s, shut off, then long beep for 60 seconds.
2.4.9 FAN Operation
For MS Series model, there are two DC fans.
The DC fans will just the fan speed in a linear proportion according to load and charger wattage.
It will slow down after 1 minute when the triggering condition disappears.
Allow at least 30CM of clearance around the inverter for air flow. Make sure that the air can circulate freely
around the unit.
Fan noise level <60db at a distance of 1 meter.
2.4.10 Auto Generator Start Dry Contact
The solar inverter is built with a very versatile 3-pin dry contact rated at 3A/250VAC on the rear
panel.
The internal relays of the dry contact will give out either “close” or “open” signals.
These signals can be used to indicate the low battery voltage alarm or control a generator.
The NC & C pins are constantly close, they will open when battery voltage reaches low alarm or the setting
in Program 12 (DC to AC Transfer).
The NO & C pins are constantly open, they will close when battery voltage reaches low alarm or the setting
in Program 12 (DC to AC Transfer) to start the generator. Once the generator is started and battery voltage
increases with charging, the dry contact pins will open at the setting of Program 13 (AC to DC Transfer) to
avoid overcharging.
Unit Status Operation
NC & C
NO & C
Power Off Inverter off ( no AC output)
Close
Open
Содержание MS6048D
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