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5.1.3 Initialization and measures to be taken at the time of abnormality
In the event of occurrence of abnormality in which the inverter is stopped, relevant message will be
displayed. Once the cause of the abnormality is removed, the system will recommence operation after
the standby time. If the same symptom occurs or reoperation does not occur, please contact our
company. A total of 100 faults will be stored in the order of the faults being scanned scan from No. 0 to
99 with the most recent fault being numbered with 0.
It is possible to discern the variables or the past abnormal status by using the UP and DOWN button on
the keypad inside the inverter.
Parameter values can be changed by using the internal keypad in the event of stoppage of inverter.
Initialization includes Parameter initialization and Fault initialization. Parameter initialization sets all
parameters or optional functions at the value set at the time of the shipment from factory, while Fault
initialization put the system in ready status by removing all the records of faults generated in the past.
Erroneous operation of inverter can occur if the internal keypad is manipulated arbitrarily. Please
contact our company in such event.
5.1.4 Breakdown (Fault)
1) Breakdown (Fault)
Protection against Input over voltage
If the voltage of solar cell is above the stipulated voltage, the system will be stopped to protect the
inverter.
Protection against output overcurrent
If output overcurrent occurs in the inverter under the abnormal conditions of load state, the system will
be stopped to protect the inverter.
Protection against output overload
If there is abnormal output over prescribed period of time in excess of the rated output of the inverter,
the system will be stopped to protect the inverter.
Protection against overheating of inverter
If the internal temperature of the inverter exceeds 105
℃
, overheating is prevented by stopping the
operation of the system. Once the internal temperature of the inverter returns to normal level, it will be
reset and re-operated normally.
Protection against earth fault
System will be stopped if leakage current occurs due to earth fault.
Protection against system fault (Over/Under frequency fault, Over/Under voltage fault)
System will be stopped in the event of abnormality in the system power (protection of the system and
voltage, low system voltage, over-frequency and under-frequency of the system)
PWM control fault (Over current 2)
System will be stopped in the event of occurrence of abnormality in the internal PWM control of the
inverter.
