Huawei LUNA2000-200KWH-2H1 - Page 37

Alarm
ID
Alarm
Name
Alarm
Severit
y
Possible Cause Suggestion
3813 Air
Conditio
ner AC
Overvol
tage
Major Cause ID = 1–13
1. The auxiliary power
cable is incorrectly
connected.
2. [HVAC-No] The
main control board
is faulty.
3. The overvoltage
alarm threshold is
improper.
1. Measure the voltage of the air
conditioner wiring terminal. If the
voltage is approximately 380 V, the
auxiliary power cable is incorrectly
connected. Disconnect the auxiliary
power supply and reconnect the cable
correctly.
2. If the voltage is approximately 220 V,
contact your technical support.
3814 Air
Conditio
ner AC
Undervo
ltage
Major Cause ID = 1–13
1. [HVAC-No] The
power cable is
loose.
2. The model of
auxiliary power
supply is incorrect.
3. The main control
board is faulty.
4. The undervoltage
alarm threshold is
improper.
1. Measure the voltage of the air
conditioner wiring terminal. If the
voltage is approximately 110 V or 127
V, the auxiliary power supply does not
meet the requirements. Disconnect the
auxiliary power supply immediately
and replace it with a 380 V power
supply.
2. If the voltage is lower than 150 V,
check whether the cable is loose.
3. If the voltage is approximately 220 V,
contact your technical support.
3816 Air
Conditio
ner
Evapora
tor
Temper
ature
Sensor
Fault
Minor Cause ID = 1–13
1. [HVAC-No] The
cable of the
evaporator
temperature sensor
is loose.
2. The sensor is
damaged, open-
circuited, or short-
circuited.
1. Shut down the system at a proper
time and take security protection
measures.
2. Check whether any cable is loose.
3. Replace the evaporator temperature
sensor.
3817 Air
Conditio
ner
Condens
er
Temper
ature
Sensor
Fault
Minor Cause ID = 1–13
1. [HVAC-No] The
cable is not
connected securely
or correctly.
2. The sensor is
damaged, open-
circuited, or short-
circuited.
1. Shut down the system at a proper
time and take security protection
measures.
2. Check whether any cable is loose.
3. Replace the condenser temperature
sensor.
LUNA2000-200KWH-2H1 Smart String ESS
Maintenance Manual 3 Alarm Reference
Issue 02 (2023-02-28) Copyright © Huawei Digital Power Technologies Co., Ltd. 31