Huawei SUN2000-15KTL-50KTL-M3 Series User Manual page 38

Replacing SUN2000-(15KTL-50KTL) Series with
SUN2000-(15KTL-50KTL)-M3 Series
User Manual
ID Name
Low
2062
insulation
resistance
2063 Cabinet
overtemp
erature
Device
2064
fault
2065 Upgrade
failed or
version
mismatch
2066 License
expired
Issue 01 (2021-04-05)
Severity Cause
Major Cause ID = 1
 The PV array is
short-circuited with PE.

The PV string has been in a
moist environment for a
long time and the circuit is
not well insulated to
ground.
Minor Cause ID = 1
 The inverter is installed in a
place with poor ventilation.
 The ambient temperature
exceeds the upper
threshold.
 The inverter is not
operating properly.
Major Cause ID = 1–15
An unrecoverable fault occurs
on a circuit inside the inverter.
Minor Cause ID = 1–6
The upgrade is not completed
normally.
Warning Cause ID = 1
 The privilege license has
entered the grace period.
 The privilege feature is
Copyright © Huawei Technologies Co., Ltd.
Solution
ground is normal.
3. After the inverter is powered on,
check whether the output mode
set for the inverter is consistent
with the output cable connection
mode.
1. Check the impedance between the
PV string and the PE cable. If a
short circuit occurs, rectify the
fault.
2. Check whether the PE cable of
the inverter is correctly
connected.
3. If you have confirmed that the
impedance is lower than the
specified protection threshold in a
cloudy or rainy environment, log
in to the app, SmartLogger, or
NMS and set Insulation
resistance protection threshold.
1. Check the ventilation and
ambient temperature at the
inverter installation position.
2. If the ventilation is poor or the
ambient temperature exceeds the
upper threshold, improve the
ventilation and heat dissipation.
3. If both the ventilation and
ambient temperature meet
requirements yet the alarm
persists, contact your dealer or
Huawei technical support.
Turn off the AC output switch and
DC input switch, and then turn them
on after 5 minutes. If the alarm
persists, contact your dealer or
Huawei technical support.
NOTICE
Cause ID = 1: Perform the preceding
operations when the PV string current is
less than 1 A.
1. Perform an upgrade again.
2. If the upgrade fails several times,
contact your dealer or Huawei
technical support.
1. Apply for a new license.
2. Load a new certificate.
9 Maintenance
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