Service & Parts Manual (2019, 2020, 2021, 2022)

238 PB
TROUBLESHOOTING
Outdoor Fault Codes
Fault code Fault description Possible reasons for
abnormality
How to deal with Remarks
1 Outdoor ambient
temperature sensor
fault
"1.The outdoor ambient
temperature sensor is
connected loosely;
2.The outdoor ambient
temperature sensor
fails to work;
3.The sampling circuit
fails."
"1.Reconnect the
outdoor ambient
temperature sensor;
2.Replace the outdoor
ambient temperature
sensor components;
3.Replace the
outdoor control board
components."
2 Outdoor coil
temperature sensor
fault
"1.The outdoor coil
temperature sensor
is connected loosely;
2.The outdoor coil
temperature
sensor fails to work;
3.The sampling circuit
fails."
"1.Reconnect
the outdoor coil
temperature sensor;
2.Replace the outdoor
coil temperature sensor
components;
3.Replace the
outdoor control board
components."
3 The unit over-current
turn off fault
"1. Control board
current sampling
circuit fails;
2. The current is over
high because the supply
voltage is too low;
3. The compressor is
blocked;
4. Overload in cooling
mode;
5. Overload in heating
mode."
"1. Replace the
electrical control board
components;
2. Normally protection
3. Replace the
compressor
4. Please see the Note 3
5. Please see the Note
4"
4 EEprom Data error "1.EE components fails;
2.EE components
control circuit fails;
3.EE components are
inserted incorrectly."
"1.Replace the EE
components; 2.Replace
the outdoor control
board components;
3.Reassembly the EE
components."
5 Cooling freezing
protection (the indoor
coil temperature is
too low) or heating
overload (indoor coil
temperature is too high)
"1.The indoor unit can
not blow air normally;
2.The room temperature
is too low in cooling
mode or the room
temperature is too high
in heating;
3.The filter is dirty;
4.The duct resistance is
too high to result in low
air flow;
5.The setting fan speed
is too low; 6.The indoor
unit is not installed in
accordance with the
installation
standards, and the air
inlet is too
close to the air outlet ."
"1.Check whether the
indoor fan, indoor fan
motor and evaporator
work normally;
2.Normal protection;
3.Clean the filter;
4.Check the volume
control valve, duct
length etc.;
5.Set the speed with
high speed;
6.Reinstall the indoor
unit referring to the
user manual to change
the distance between
the indoor unit and the
wall or ceiling."