Huawei LUNA2000-2.0MWH-1H0 User Manual page 145

LUNA2000-2.0MWH-1H0, 2H0 Smart String ESS
User Manual
Alar Alarm
m ID Name
3813 Air
Condition
er AC
Overvolta
ge
3814 Air
Condition
er AC
Undervol
tage
3815 Air
Condition
er AC
Power
Failure
3816 Air
Condition
er
Evaporat
or
Temperat
ure
Sensor
Fault
Issue 02 (2021-11-15)
Severit Possible Causes
y
Major Cause ID=1-13
1. The input voltage is
higher than the
overvoltage threshold.
2. The overvoltage
threshold setting is
improper.
3. The voltage test device
is faulty.
Major Cause ID=1-13
1. The input voltage is
lower than the
undervoltage
threshold.
2. The undervoltage
threshold setting is
improper.
3. The voltage test device
is faulty.
Major Cause ID=1
1. The power supply
device is faulty or
disconnected.
2. The power supply
circuit is disconnected.
Minor Cause ID=1-13
1. The cable is not
connected securely or
correctly.
2. The sensor is
damaged, open-
circuited, or short-
circuited.
Copyright © Huawei Technologies Co., Ltd.
Troubleshooting Suggestions
1. Check the voltage of the input
power supply. If the voltage is too
high, check the power distribution
device.
2. Check whether the overvoltage
threshold is correctly set. If not,
adjust it to a proper range.
3. Replace the voltage test device on
the control board.
4. If the fault persists, contact your
dealer or Huawei technical support.
1. Check the voltage of the input
power supply. If the voltage is too
low, check the power distribution
device.
2. Check whether the undervoltage
threshold is correctly set. If not,
adjust it to a proper value.
3. Replace the voltage test device on
the control board.
4. If the fault persists, contact your
dealer or Huawei technical support.
1. Check the voltage of the input
power supply and the power supply
device.
2. Check whether the power supply
circuit is abnormal.
3. If the fault persists, contact your
dealer or Huawei technical support.
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.
10 Alarm Reference
137