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Message 1: One beep per second. The battery voltage has reached a too low or too high
level. If the battery voltage respectively decreases or increases any further, the
inverter shuts down.
Message 2: Two beeps per second. The inverter will shut down soon due to an
overloaded output. Note that at heavy overloads the alarm will not sound due to
too fast inverter shut down. Normally the inverter warns approx. 10 seconds before
shutdown.
Message 3: Three beeps per second. The inverter will shut down when it's temperature is
rising another two degrees Celsius.
3.3
Troubleshooting guideline
PROBLEM :Inverter is not working (AC Present LED OFF)
Possible cause :
Power switch in OFF (0) position
Poor contact between the inverter's battery
wires and the battery terminals.
Blown inverter fuse
Very poor battery condition
Remote ON/OFF switch link removed and/or
remote switch in OFF position
PROBLEM :'Battery voltage too low or too high' error keeps on appearing
Possible cause :
Poor battery condition
Poor connection or inadequate wiring between
battery and inverter, resulting in too much
voltage drop
General failure in your electrical system (in case
of no direct battery connection)
PROBLEM :'Overloaded or shorted output' error keeps on appearing
Possible cause :
Inverter is overloaded
Connected equipment features a bad power
factor (cosϕ at sinusoidal currents)
Connected equipment causes a short circuit at
The Alessi-Serie
Pure Sine Wave Inverters
- 11 -
Remedy :
Push the power switch either in the ON (I) or in
the ASB (II) position.
Clean battery terminals or inverter wire
contacts. Tighten battery terminal screws.
Replace damaged fuse with the correct type.
Make sure you disconnect the battery before
changing the fuse. See chapter 5.2 for further
information regarding fuse replacement.
Replace battery or charge it first
Make sure that there is a closed circuit between
the two Remote ON/OFF switch contacts to
start the inverter.
Remedy :
Replace battery or charge it first
When extending the battery wires of the inverter
make sure you use the correct wire gauge (≥
1.5 times larger than the fixed battery wires). It's
not advisable to extend the battery wires to
more than 3 meters.
Check your electrical system or consult an
electrical engineer to check it for you
Remedy :
Make sure that the total power rating of the
connected equipment is lower than the nominal
inverter power rating.
reduce the required power consumption of the
load. Please note that for example a computer
load features a bad power factor, which causes
a reduction of the maximum output power of the
inverter by approx. 20%.
Make sure that the connected equipment is not
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