Huawei SUN 2000 Series User Manual page 56

SUN2000-4.95KTL-JPL0
User Manual
Alarm ID Alarm
Name
2051 Abnormal
Residual
Current
Low
2062
Insulation
Resistance
Cabinet
2063
Overtempe
rature
2064 Device
Fault
Upgrade
2065
Failed or
Version
Mismatch
Issue 03 (2020-06-03)
Alarm Cause
Severity
Major Cause ID = 1
The insulation impedance of
the input side to PE decreases
when the solar inverter is
operating.
Major Cause ID = 1
 A short circuit occurs
between the PV array and
the ground.
 The ambient air of the PV
array is damp and the
insulation between the PV
array and the ground is
poor.
Minor Cause ID = 1
 The solar inverter is
installed in a place with
poor ventilation.
 The ambient temperature is
too high.

The solar inverter is not
working properly.
Major Cause ID = 1–12
An unrecoverable fault has
occurred on a circuit inside the
solar inverter.
Minor Cause ID = 1, 2 and 4
The upgrade does not complete
normally.
Copyright © Huawei Technologies Co., Ltd.
7 System Maintenance
Suggestions
1. If the alarm occurs occasionally,
the external circuit may be
abnormal temporarily. The solar
inverter automatically recovers
after the fault is rectified.
2. If the alarm occurs frequently or
persists, check whether the
impedance between the PV string
and the ground is too low.
1. Check the output impedance of
the PV array to ground. If there is
a short circuit or lack of
insulation, rectify it.
2. Check that the PE cable of the
solar inverter is correctly
connected.
3. If you are sure that the impedance
is less than the default value in a
cloudy or rainy environment, log
in to the app, SmartLogger, or
NMS and set Insulation
resistance protection.
1. Check the ventilation and
ambient temperature of the solar
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 the ventilation and ambient
temperature both meet
requirements, 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 fault
persists, contact your dealer or
Huawei technical support.
1. Perform an upgrade again.
2. If the upgrade fails for multiple
times, contact your dealer or
Huawei technical support.
50