Alarm
ID
Alarm
Name
Alarm
Severit
y
Possible Cause Suggestion
3804 AC SPD
Fault
Major Cause ID = 1
The AC SPD is faulty.
1. Check whether the AC SPD signal
cable is loose.
2. Check whether the color of the AC
SPD indicator changes.
3. Replace the AC SPD.
3805 Air
Conditio
ner
Temper
ature
High
Major Cause ID = 1–13
The return air
temperature of [HVAC-
No] exceeds the high
temperature alarm
threshold.
1. Check that the high temperature
alarm threshold is set to a proper
value. The default value is 45°C.
2. If the preceding threshold is set to a
proper value and multiple air
conditioners report the alarm, shut
down the system and contact your
technical support.
3. If only one air conditioner reports the
alarm, check other alarms reported by
the air conditioner and rectify the
faults based on the troubleshooting
suggestions. If no other alarm is
generated, shut down the air
conditioner and contact your technical
support.
3806 Air
Conditio
ner
Temper
ature
Low
Major Cause ID = 1–13
The return air
temperature of [HVAC-
No] is below the low
temperature alarm
threshold.
1. Check that the low temperature alarm
threshold is set to a proper value. The
default value is –30°C.
2. If the preceding threshold is set to a
proper value and multiple air
conditioners report the alarm, shut
down the system and contact your
technical support.
3. If only one air conditioner reports the
alarm, check other alarms reported by
the air conditioner and rectify the
faults based on the troubleshooting
suggestions. If no other alarm is
generated, shut down the air
conditioner and contact your technical
support.
LUNA2000-200KWH-2H1 Smart String ESS
User Manual 13 Alarm Reference
Issue 03 (2023-03-30) Copyright © Huawei Digital Power Technologies Co., Ltd. 151
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