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3. SELF DIAGNOSIS SYSTEM / TROUBLESHOOTING
3.1
The blink sequence table
This Alessi inverter is equipped with a self diagnosis system, to inform you about the cause of
inverter shut down. To visualize this, the red Error/Overload LED can blink in four different
sequences. The duration, or timeperiod, of this sequence is about 1 second. During this timeperiod
the red LED can blink four times in a row at most. The number of blinks in this time period indicates
the cause of inverter shut down.
In the table below you can find out what kind of blinking sequence belongs to which error.
Red LED conditions :
= LED blinking
= LED ON
= LED OFF
Time period (1 second)
→ Overload, output in current limit
IN A 'BATTERY VOLTAGE TOO LOW OR TOO HIGH' ERROR, THE
INVERTER WILL AUTOMATICALLY RESTART WHEN THE BATTERY
VOLTAGE IS IN NORMAL SPECIFIED RANGE AGAIN.
IN AN 'OVERLOADED OR SHORTED OUTPUT' ERROR, THE INVERTER
WILL AUTOMATICALLY RESTART AFTER APPROX. 18 SECONDS
IN AN 'INVERTER TEMPERATURE TOO HIGH' ERROR, THE INVERTER
WILL AUTOMATICALLY RESTART WHEN THE TEMPERATURE HAS
FALLEN TO AN ACCEPTABLE LEVEL AGAIN.
WARNING
IN A 'TOO HIGH INPUT RIPPLE VOLTAGE' ERROR, THE INVERTER WILL
NOT AUTOMATICALLY RESTART BUT NEEDS TO BE RESETTED
MANUALLY. Manual reset is necessary to notify the user that something is
wrong with the inverter's installation (too small battery, too long or thin DC wires
etc.)
3.2
Acoustical messages
To warn you before the inverter might shut down, it is equipped with an acoustical alarm. This can
be very useful when you are for example working with a computer which runs from the inverter.
The inverter can alarm you right before it is going to shut down, so you can save or finish your work
before you lose power.
There are three kinds of acoustical messages depending on the cause of possible inverter
shutdown. These messages are related to the red LED blinking sequences mentioned previously.
The Alessi-Serie
Pure Sine Wave Inverters
Type of error
Battery voltage too low or too high
(one blink per second)
Overloaded or shorted output
(two blinks per second)
Inverter temperature too high. Cooling down
(three blinks per second)
Too high input ripple voltage
(four blinks per second)
- 10 -
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