User Manual UM_ASW3000-5000H-S_EN_V01_0321 89
Presuma
ble Fault
modify the values of the monitored
operational limits after informing the electric
utility company first.
If the grid voltage lies within the permitted
range and this fault still occurs, please call
service.
35
• Check the fuse and the
triggering of the
circuit breaker in the distribution box.
• Check the grid voltage, grid usability.
• Check the AC cable, grid connection on
the inverter.
If this fault is still being shown, contact the
service.
36
• Make sure the grounding
connection of
the inverter is reliable.
•Make a visual inspection of all PV cables
and modules.
If this fault is still shown, contact the
service.
37
• Check the open
-circuit voltages of the
strings and make sure it is below the
maximum DC input voltage of the inverter.
If the input voltage lies within the permitted
range and the fault still occurs, please call
service.
38
•Check the PV array’s insulation to ground
and make sure that the insulation
resistance to ground is greater than 1