Huawei SUN2000-15KTL-50KTL-M3 Series User Manual page 28

Replacing SUN2000-(15KTL-50KTL) Series with
SUN2000-(15KTL-50KTL)-M3 Series
User Manual
ID Name
Abnormal
202
invert
circuit
Issue 01 (2021-04-05)
Severity Cause
The inverter input is
disconnected accidentally,
or the PV string output
power changes sharply
because the PV string is
shaded.

Cause ID = 10
The three phases of the
power grid are seriously
unbalanced, which triggers
the protection for the
internal control circuit of
the inverter.
 Cause ID = 11
The power grid voltage
changes sharply and the
inverter input power fails to
discharge in a short time,
which increases the internal
voltage and triggers
protection.
 Cause ID = 12/15
An unrecoverable fault
occurs on a circuit inside
the inverter.
 Cause ID = 16
The voltage between the PV
string and the ground is
abnormal, and there is a risk
of power degradation.
Abnormal external conditions
Major
trigger the protection for the
inverter circuit inside the
inverter. The possible causes
are as follows:
 Cause ID = 13
The power grid voltage
drops dramatically or the
power grid is
short-circuited. As a result,
the internal voltage
detection circuit in the
inverter is damaged.
Copyright © Huawei Technologies Co., Ltd.
Solution
2. If the alarm persists, contact
Huawei technical support.
 Cause ID = 12/15
Turn off the AC output switch
and DC input switch, and then
turn them on after 5 minutes. If
the alarm persists, contact
Huawei technical support.
NOTE
Cause ID = 12: Perform the preceding
operations when the PV string current is
less than 1 A.
 Cause ID = 16
1. If there is no PID module in
the system, set PID
protection at night and
Night-time reactive power
output to Disable for the
inverter over the SmartLogger
or app.
2. If there is a PID module in the
system, check whether the
device is abnormal. If yes,
rectify the fault.
3. Check whether PID
compensation direction of
the inverter and PV module
compensation voltage
direction of the PID module
are correctly set based on the
PV module model. If not,
reset them on the
SmartLogger or app.
4. If the alarm persists, contact
your dealer or Huawei
technical support.

Cause ID = 13/14/16
1. The inverter monitors its
external operating conditions
in real time and automatically
recovers after the fault is
rectified.
2. If the alarm persists, contact
Huawei technical support.
 Cause ID = 20
1. Check whether the inverter
output power cable is
short-circuited.
9 Maintenance
91