Huawei Smart String ESS LUNA2000-200KWH-2H1 - Page 129

LUNA2000-200KWH-2H1 Smart String ESS
User Manual
6 Alarm Reference
Issue Draft (2022-10-30)
Copyright © Huawei Technologies Co., Ltd.
122
Alarm
ID
Alarm
Name
Alarm
Severit
y
Possible Cause
Suggestion
Return
Air
Temperat
ure
Sensor
Fault
of the return air
temperature sensor is
loose.
2. The sensor is
damaged,
open-circuited, or
short-circuited.
2. Check whether any cable is loose.
3. Replace the return air temperature sensor.
3811
Air
Conditio
ner
Supply
Air
Temperat
ure
Sensor
Fault
Cause ID = 1–13
1. [HVAC-No] The cable
of the supply air
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 supply air temperature sensor.
3812
Air
Conditio
ner
System
High
Pressure
Alarm
Cause ID = 1–13
1. [HVAC-No] The
outdoor heat
exchanger is blocked
or has scale.
2. The outdoor fan is
faulty.
3. The air intake or
exhaust vent of the
outdoor fan is blocked.
1. Check whether the outdoor heat exchanger
is blocked by dirt. If yes, clean it using a
high-pressure water gun.
2. Check whether the outdoor fan is running
properly. If not, replace it.
3. Check whether the air intake or exhaust
vent of the outdoor fan is blocked. If yes,
clean the air intake or exhaust vent.
4. If the fault persists, contact your technical
support.
3813
Air
Conditio
ner AC
Overvolt
age
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
Undervol
tage
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.