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

242 PB
TROUBLESHOOTING
Outdoor Fault Codes
Fault code Fault description Possible reasons for
abnormality
How to deal with Remarks
46 1PM and control board
communication fault
"1.The cable between
the control board and
the driver board is
connected loosely;
2.The cable between the
control board and the
driver board fails;
3.The driver board fails;
4.The control board
fails."
"1.Reconnect the cable
between the control
board and the driver
board;
2.Replace the
communication cable
between the control
board and the driver
board;
3.Replace the driver
board; 4.Replace the
control board."
47 Too high discharge
temperature fault
"1. The refrigerant of
the unit is not enough;
2.The refrigerant of the
unit is not enough due
to that the installation
pipe is longer.
3.Throttling service
fails;
4.The outdoor ambient
temperature is too
high."
"1.Check the welding
point to confirm
whether the unit has
leakage point and then
add some refrigerant.
2.Add some
refrigerant referring
to the installation user
manual;
3.Replace the throttling
service (such as
capillary expansion
valve)
4.Normal protection."
48 The outdoor DC fan
motor fault (upper fan
motor)
"1.The connecting wiring
of the up DC fan motor
is loose;
2.The cord of the upper
DC fan
motor fails;
3.The upper DC fan
motor fails;
4.The drive circuit of
the upper DC fan motor
fails;
5.The outdoor fan has
been blocked."
"1.Reconnect the wiring
of the up DC fan motor;
2.Replace the upper DC
fan motor;
3.Replace the upper DC
fan motor;
4.Replace the driver
board of the fan motor;
5.Check the outdoor fan
and ensure the outdoor
fan can run normally."
49 "the outdoor DC fan
motor fault
(down fan motor)"
"1. The wiring of the
down DC fan motor
connect loose;
2. The cord of the down
DC fan motor is failure;
3. The down DC fan
motor is failure;
4. The drive circuit of
the down DC fan motor
is failure;
5. The outdoor fan has
been blocked."
"1. Reconnect the wiring
of the down DC fan
motor;
2. Replace the down DC
fan motor;
3. Replace the down DC
fan motor;
4. Replace the driver
board of the fan motor;
5. Check the outdoor fan
and ensure the outdoor
fan can run
normally."
THIS CODE IS ONLY
APPLICABLE TO
MODELS PRODUCED UP
TO AND INCLUDING THE
YEAR 2020.
50 Expansion valve E (gas
pipe) sensor fault
"1. The wiring of
the sensor for the
expansion valve E (gas
pipe) is connected
loosely;
2. The sensor of the
expansion valve E (gas
pipe) fails;
3. The sampling circuit
fails."
"1. Reconnect the wiring
of the sensor for the
expansion valve E (gas
pipe);
2. Replace the sensor
for the expansion valve
E (gas pipe);
3. Replace the outdoor
control board."
THIS CODE IS ONLY
APPLICABLE TO THE
42K MULTIZONE
OUTDOOR UNIT.