Item Check Method Maintenance
Frequency
Electrical
connections
● Check that cables are securely
connected.
● If clamps are used for AC cable
connections, check that they are
secured with a torque of 35
N·m.
● Check that cables are intact, in
particular, the parts touching
the metallic surface are not
scratched.
● Check that the unused COM,
USB, and RESERVE ports are
covered by watertight caps.
The rst inspection is
six months after the
initial commissioning.
From then on, the
interval can be six or
twelve months.
Grounding
reliability
Check that ground cables are
securely connected.
The rst inspection is
six months after the
initial commissioning.
From then on, the
interval can be six or
twelve months.
8.2 Troubleshooting
Alarm severities are dened as follows:
● Major: The inverter is faulty. As a result, the output power decreases or the
grid-tied power generation is stopped.
● Minor: Some components are faulty without
aecting the grid-tied power
generation.
● Warning: The inverter works properly. The output power decreases or some
authorization functions fail due to external factors.
SUN2000-(70KTL, 75KTL)-C1
User Manual 8 Maintenance
Issue 09 (2020-10-12) Copyright © Huawei Technologies Co., Ltd. 97
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