Huawei LUNA2000-2.0MWH Series - Page 191

Alarm
ID
Alarm
Name
Severity Possible Cause Suggestion
3817 Air
Condition
er
Condenser
Temperatu
re Sensor
Fault
Minor Cause ID = 1–13
1. The cable of [HVAC-
No] 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 safety
measures.
2. Check whether the cable is loose.
3. Replace the condenser
temperature sensor.
3818 Air
Condition
er
Ambient
Temperatu
re Sensor
Fault
Minor Cause ID = 1–13
1. The cable of [HVAC-
No] 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 safety
measures.
2. Check whether the cable is loose.
3. Replace the environment
temperature sensor.
3819 Air
Condition
er
Evaporato
r Frozen
Minor Cause ID = 1–13
1. The air intake or
exhaust of [HVAC-No] is
blocked.
2. The indoor fan is
faulty.
3. The cooling system
cannot be shut down in
a timely manner.
4. The evaporator
temperature sensor is
faulty.
1. Check whether the air intake or
exhaust vent of the CMU cabin is
blocked. If yes, clean it.
2. If the fault persists, contact your
technical support.
3820 Frequent
Air
Condition
er System
High
Pressure
Alarm
Major Cause ID = 1–13
1. The condenser of
[HVAC-No] is blocked or
has scale.
2. The condenser fan is
faulty.
3. The external air
ow
experiences a shortcut
or is blocked.
1. Clean the outdoor heat
exchanger.
2. Repair or replace the outdoor
fan.
3. Check whether there are
obstacles in front of the air or
exhaust vent of the outdoor fan.
4. If the fault persists, contact your
dealer or technical support.
LUNA2000-2.0MWH Series Smart String ESS
User Manual 10 Alarm Reference
Issue 08 (2022-11-15) Copyright © Huawei Technologies Co., Ltd. 181