SUN2000-(2KTL-5KTL)-L0
User Manual
Copyright © Huawei Technologies Co., Ltd.
Ground cables are securely connected.
The first maintenance is
half a year after the
initial commissioning.
From then on, perform
the maintenance once
every 6 to 12 months.
7.2 Troubleshooting
Alarm severities are defined as follows:
Major: The SUN2000 enters Shutdown mode and disconnects from the power grid to
stop generating power after a fault occurs.
Minor: Some components are faulty but the SUN2000 can still connect to the power grid
and generate power.
Warning: The SUN2000 output power decreases due to external factors.
Table 7-2 Common alarms and troubleshooting measures
High String
Input Voltage
The PV array is incorrectly
configured. Excessive PV
modules are connected in
series to the PV string, and
therefore the open-circuit
voltage exceeds the
maximum inverter input
voltage.
The following is the
mapping between PV
strings and alarm cause IDs:
Cause ID = 1: string 1
Cause ID = 2: string 2
Reduce the number of PV modules
connected in series to the PV string
until the PV string open-circuit
voltage is less than or equal to the
maximum inverter input voltage.
After the PV array is correctly
configured, the inverter alarm
disappears.
The PV string is reversely
connected.
The following is the
mapping between PV
strings and alarm cause IDs:
Cause ID = 1: string 1
Cause ID = 2: string 2
Check whether the PV string is
reversely connected to the
SUN2000. If yes, wait until the PV
string current reduces to below 0.5
A. Then, turn off the DC switch and
correct the PV string polarity.
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