SUNWAY M XS 7500TL
INSTALLATION AND
PROGRAMMING INSTRUCTIONS
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A136
Description
Protection against leakage current instant variations
Event
Instant variations of the leakage current exceeding the maximum
allowable variations.
The leakage current variation has been at the maximum value of 30
mA for 300 ms.
The leakage current variation has been at the maximum value of 60
mA for 150 ms.
The leakage current variation has been at the maximum value of 150
mA for 40 ms.
Possible
Causes
Sudden variations of the grid.
Output short-circuit or earth short-circuit.
Accidental contact of foreign matters with the power cables.
Solutions
Check wiring.
Decouple the PV field from the inverter and check if short-circuits or
low-impedance paths occur between the PV field and the earth.
Reset the alarm (4.3.6.2).
If the alarm persists, contact the Customer Service of Elettronica
Santerno SpA.
A137
Description
DC Current injected to the grid out of allowable range
Event
The DC current to grid detected by the inverter is too high.
Possible
Causes
Sudden variations of the grid.
Output short-circuit or earth short-circuit.
Solutions
Reset the alarm (4.3.6.2).
If the alarm persists, contact the Customer Service of Elettronica
Santerno SpA.
A138
Description
Leakage current protection
Event
The leakage current to earth has exceeded the maximum allowable
current.
The current to earth has exceeded 300 mA (RMS).
Possible
Causes
PV field isolation loss to earth.
Increase of the parasitic capacitance of the PV plant due to adverse
weather conditions (rain, snow, high humidity).
Solutions
Reset the alarm (4.3.6.2).
Do the following if the alarm persists after energy delivery is restored
or alarm
A068
trips:
Check if warnings pertaining to the fan faults are displayed (4.3.7).
Decouple the PV field from the inverter and check if short-circuits or
low-impedance paths occur between the PV field and the earth.
Decouple the PV field from the inverter and check if high capacitive
values are to be found between each pole of the PV field and the
earth. Capacitive values over 10uF normally trigger alarm
A138
.
If the alarm persists, contact the Customer Service of Elettronica
Santerno SpA.