Huawei SUN2000-50KTL-ZHM3 User Manual page 80

SUN2000-(50KTL-ZHM3, 50KTL-M3)
User Manual
ID Name
2085 Built-in
PID
operation
abnormal
Issue 01 (2022-07-29)
Severity Cause
string is reversely
connected.
Cause ID = 4

The number of PV strings
connected to the inverter
exceeds the upper
threshold.
Cause ID = 5

The PV string output is
reversely connected or the
PV string output is
short-circuited.
Cause ID = 6

Under the same MPPT, the
number of optimizers
connected in series in PV
strings connected in parallel
is different, or the output of
some optimizers in PV
strings is reversely
connected.
Cause ID = 7

The optimizer installation
position is changed, or PV
strings are combined or
exchanged.
Cause ID = 8

The sunlight is weak or
changes abnormally.
Cause ID = 9

In partial configuration
scenarios, the PV string
voltage exceeds the inverter
input voltage specifications.
Minor Cause ID = 1, 2
The output resistance of PV

arrays to ground is low.
The system insulation

resistance is low.
Copyright © Huawei Technologies Co., Ltd.
Solution
output is reversely connected.
3. Check whether the PV string
output is disconnected.
4. Check whether the optimizer
output extension cable is
correct (positive connector at
one end and negative
connector at the other).
Cause ID 4: Check whether the

number of PV strings exceeds the
upper threshold.
Cause ID 5: Check whether the

PV string output is reversely
connected or short-circuited.
Cause ID 6:

1. Check whether the number of
optimizers connected in series
in the PV strings connected in
parallel under the same MPPT
is the same.
2. Check whether the optimizer
output extension cable is
correct (positive connector at
one end and negative
connector at the other).
Cause ID 7: When the sunlight is

normal, perform the optimizer
search function again.
Cause ID 8: When the sunlight is

normal, perform the optimizer
search function again.
Cause ID 9: Calculate the PV

string voltage based on the
number of PV modules in the
string and check whether the
string voltage exceeds the upper
threshold of the inverter input
voltage.
Cause ID = 1

1. Turn off the AC output switch
and DC input switch, wait for
a period of time (for details
about the wait time, see the
description on the device
safety warning label), and
then turn on the DC input
switch and AC output switch.
2. If the alarm persists, contact
your dealer or Huawei
8 Maintenance
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