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4.3 Operating method
4.3.1 Issues to be checked prior to operation
Check the status of wiring and installation of inverter.
In particular, check whether the input polarity of solar cell is accurately connected and whether the
system line connection is made accurately.
Supply DC solar cell power to inverter. When DC power is supplied, the inverter will automatically
check abnormality in AC power before commencing operation automatically after having undergone
300 seconds of operation countdown.
(If needed, apply power by turning ON the DC switch after having checked DC voltage by turning off
the DC switch of junction box.)
4.3.2 Automatic operation
At the time of shipment from factory, the initial setting is in automatic operation mode.
If the solar cell module voltage increases above the set value due to sunlight, the inverter will be
initiated automatically.
At the time of sunset, the solar cell module voltage will be dropped. If it falls below the set voltage, the
inverter will stop operating automatically. The system power is always monitored and the operation will
be stopped automatically in the event of abnormality.
5. Functions
5.1 Explanations on functions
5.1.1 System monitoring
Presence of normal and abnormal system voltage is determined by the difference in the voltage with the
normal voltage (Fault high vtg., Fault low vtg.). If this value is larger or smaller than the designated
value, the inverter will be stopped. If the frequency of the system voltage (Line frequency) is outside the
range of Fault high freq. and Fault low freq. values, it does not operate and stops the inverter.
In order to initiate power generation in normal system status, wait until operation countdown (Line tran.
time) is completed before operating with the system. The frequency of system voltage used can be set
in accordance with the system frequency.
5.1.2 MPPT control and total power generated
Since the output of the solar cell module changes in accordance with the ambient temperature, humidity
and sunlight, Maximum Power Point Tracking (MPPT) algorithm needs to be executed harmoniously.
Format applied to this product has almost no pulsation of current. Inverter will be stopped if the inverter
cannot be operated anymore due to the solar cell reaching the stop voltage (PV stop voltage).
Since the total power generated (Total power) is remembered by being accumulated, it is possible to
check the total power generated.
