Huawei SUN2000-250KTL Series User Manual page 85

SUN2000-(250KTL, 280KTL, 300KTL, 330KTL) Series
User Manual
Alar Alarm
m ID Name
2014 High
String
Voltage
to
Ground
2015 PV
String
Loss
2031 Phase
Wire
Short-
Circuited
to PE
Issue 02 (2022-12-20)
Alarm Possible Cause
Severity
Major Cause ID = 1
The string-to-ground
voltage is abnormal, which
may cause power
degradation risks.
Warning Cause ID = 1–28,
corresponding to PV1–PV28
respectively.
● A single string is lost.
● Both 2-in-1 PV strings
are lost.
● Either of the 2-in-1 PV
strings is lost.
Major Cause ID = 1
The phase wire is short-
circuited to PE or its
impedance to PE is low.
Copyright © Huawei Technologies Co., Ltd.
8 System Maintenance
Suggestion
1. If no PID compensation device is
deployed in the system, disable
the PID protection function. Note:
If the PID protection function is
disabled but the nighttime reactive
power compensation is enabled,
PV module degradation may occur.
2. If there is a PID compensation
device in the system, check
whether it is faulty. If yes, rectify
the fault.
3. Check whether the device and PID
compensation device have
consistent compensation direction
settings. If not, adjust the settings
based on the PV module model.
(Note: If the PV– is set to positive
offset, the voltage between the
PV– of the device and the ground
should be greater than 0 V to
clear the alarm; if the PV+ is set to
negative offset, the voltage
between the PV+ of the device and
the ground should be less than 0 V
to clear the alarm.)
4. If the alarm occurs repeatedly,
contact your dealer or technical
support.
1. Check whether cables are properly
connected to the inverter
terminals.
2. Check whether cables are properly
connected to the PV string
terminals.
3. If a 2-in-1 terminal is used, check
whether it is normal.
4. If the string connection status is
manually configured, check
whether the configured status is
consistent with the actual
connection status.
Check the impedance of the phase
wire to PE, locate the position with
low impedance, and rectify the fault.
79