Huawei LUNA2000-2.0MWH-1H0 - Page 144

Alar
m ID
Alarm
Name
Severit
y
Possible Causes Troubleshooting Suggestions
3808 Air
Condition
er
External
Fan Fault
Major
3809 Air
Condition
er
Compress
or Fault
Major Cause ID=1-13
1. The cable is not
connected securely or
correctly.
2. The compressor
protector is
disconnected.
1. Check whether the cables are
securely and correctly connected
based on the circuit diagram.
2. Check whether the compressor coil
is open-circuited. If yes, wait until
the coil cools down and the
compressor coil automatically
resets.
3. If the fault persists, contact your
dealer or Huawei technical support.
3810 Air
Condition
er Return
Air
Temperat
ure
Sensor
Faulty
Major Cause ID=1-13
1. The cable is not
connected securely or
correctly.
2. The sensor is
damaged, open-
circuited, or short-
circuited.
1. Check whether the cables are
securely and correctly connected
based on the circuit diagram.
2. Replace the temperature sensor.
3. If the fault persists, contact your
dealer or Huawei technical support.
3811 Air
Condition
er Return
Air
Temperat
ure
Sensor
Fault
Major
3812 Air
Condition
er System
High
Pressure
Alarm
Major Cause ID=1-13
1. The condenser 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 Huawei technical support.
LUNA2000-2.0MWH-1H0, 2H0 Smart String ESS
User Manual 10 Alarm Reference
Issue 02 (2021-11-15) Copyright © Huawei Technologies Co., Ltd. 136