SUN2000-(33KTL-A, 36KTL, 42KTL)
User Manual
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Check that the idle COM, USB, and
AC OUTPUT ports are locked by
waterproof caps.
Check that ground cables are securely
connected.
The first inspection is
half a year after the
initial commissioning.
From then on, perform
the inspection once six
months to a year.
8.2 Troubleshooting
Alarm severities are defined as follows:
Major: The SUN2000 enters the shutdown mode and disconnects from the power grid to
stop generating electricity after a fault occurs.
Minor: Some components are faulty but the SUN2000 can still generate electricity.
Warning: The SUN2000 output power decreases due to external factors.
Table 8-2 Common alarms and troubleshooting measures
Cause ID = 1
The PV array is not properly
configured. Excessive PV
modules are connected in
series to PV strings 1 and 2,
and therefore the PV string
open-circuit voltage exceeds
the maximum value of the
inverter MPPT voltage.
Cause ID = 2
The PV array is not properly
configured. Excessive PV
modules are connected in
series to PV strings 3 and 4,
and therefore the PV string
open-circuit voltage exceeds
the maximum value of the
inverter MPPT voltage.
Cause ID = 3
The PV array is not properly
configured. Excessive PV
modules are connected in
series to PV strings 5 and 6,
Cause ID = 1
Reduce the number of PV modules
connected in series to PV strings 1
and 2 until the open-circuit voltage
is less than or equal to the
maximum inverter input voltage.
After the PV array configuration is
corrected, the SUN2000 alarm
disappears.
Cause ID = 2
Reduce the number of PV modules
connected in series to PV strings 3
and 4 until the open-circuit voltage
is less than or equal to the
maximum inverter input voltage.
After the PV array configuration is
corrected, the SUN2000 alarm
disappears.
Cause ID = 3
Reduce the number of PV modules
connected in series to PV strings 5
and 6 until the open-circuit voltage
is less than or equal to the
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