Alar
m ID
Alarm
Name
Alarm
Severity
Possible Cause Suggestion
2015 PV
String
Loss
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.
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
congured, check
whether the
congured status is
consistent with the actual
connection status.
2031 Phase
Wire
Short-
Circuited
to PE
Major Cause ID = 1
The phase wire is short-
circuited to PE or its
impedance to PE is low.
Check the impedance of the phase
wire to PE, locate the position with
low impedance, and rectify the fault.
2032 Grid
Loss
Major Cause ID = 1
● The power grid
experiences an outage.
● The AC circuit is
disconnected or the AC
circuit breaker is OFF.
1. Check whether the AC voltage is
normal.
2. Check whether the AC circuit is
disconnected or the AC circuit
breaker is OFF.
2033 Grid
Undervo
ltage
Major Cause ID = 1
The grid voltage is below
the lower threshold or the
undervoltage duration
exceeds the time that
triggers low voltage ride-
through (LVRT).
1. If the alarm occurs occasionally,
the power grid may be abnormal
temporarily. The device
automatically recovers after
detecting that the power grid
becomes normal.
2. If the alarm occurs frequently,
check whether the power grid
voltage is within the allowed
range. If no, contact the local
power operator. If yes, modify the
power grid undervoltage
protection threshold after
obtaining the consent of the local
power operator.
3. If the fault persists for a long time,
check the connection between the
AC switch and power cables.
SUN2000-(250KTL, 280KTL, 300KTL, 330KTL) Series
User Manual 9 Alarm Reference
Issue 07 (2023-06-30) Copyright © Huawei Technologies Co., Ltd. 90
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