Hisense 2AMW-42U4RRA, Technical & Service Manual, Page: 66 / 80

14.TROUBLESHOOTING
Fault
Code
Fault Description Possible Reason of Abnormality How to Deal With Remarks
23
24
25
26
27
28
29
30
45
62
Expansion valve A
tube (thin) sensor
fault
1. The wiring of the sensor for the
expansion valve A(thin tube)
connect loose;
2. The sensor for the expansion
A(thin tube) is failure;
3. The sampling circuit is
abnormally.
1. Reconnect the wiring of the
sensor for the expansion valve
A (thin tube);
2. Replace the sensor for the
expansion valve A (thin tube);
3. Replace the outdoor control
board.
Expansion valve B
(thin)tube sensor fault
1. The wiring of the sensor for
the expansion valve B (thin
tube) connect loose;
2. The sensor for the expansion
valve B(thin tube) is failure;
3. The sampling circuit is
abnormally
1. Reconnect the wiring of the
sensor for the expansion valve
B(thin tube);
2. Replace the sensor for the
expansion valve B(thin tube);
3. Replace the outdoor control
board.
Expansion valve C
(liquid) pipe sensor
fault
1. The wiring of the sensor for
the expansion valve C (liquid
pipe) is connected loosely;
2. The sensor of the expansion
valve C
(
liquid pipe
)
fails;
3. The sampling circuit fails.
1. Reconnect the wiring of the
sensor for the expansion valve
C (liquid pipe).
2. Replace the sensor for the
expansion valve C (liquid pipe);
3. Replace the outdoor control
board.
Expansion valve D
(liquid) pipe sensor
fault
1.The wiring of the sensor for the
expansion valve D (liquid pipe)
is connected loosely;
2.The sensor of the expansion
valve D (liquid pipe) fails;
3.The sampling circuit fails.
1. Reconnect the wiring of the
sensor for the expansion valve
D (liquid pipe);
2. Replace the sensor for the
expansion valve D (liquid pipe);
3. Replace the outdoor control
board.
Expansion valve A
(gas pipe) sensor
fault
1. The wiring of the sensor for
the expansion valve A (gas
pipe) is connected loosely;
2. The sensor of the expansion
valve A (gas pipe) fails;
3. The sampling circuit fails.
1. Reconnect the wiring of the
sensor for the expansion valve
A (gas pipe);
2. Replace the sensor for the
expansion valve A (gas pipe);
3. Replace the outdoor control
board.
Expansion valve B
(
gas pipe
)
sensor
fault
1. The wiring of the sensor for
the expansion valve B (gas
pipe) connect is connected
loosely;
2. The sensor of the expansion
valve B (gas pipe) fails;
3. The sampling circuit fails.
1. Reconnect the wiring of the
sensor for the expansion valve
B (gas pipe);
2. Replace the sensor for the
expansion valve B (gas pipe);
3. Replace the outdoor control
board.
Expansion valve C
(gas pipe) sensor
fault
1. The wiring of the sensor for
the expansion valve B (gas
pipe) connect is connected
loosely;
2. The sensor of the expansion
valve C (gas pipe) is fails;
3. The sampling circuit fails.
1. Reconnect the wiring of the
sensor for the expansion valve
B (gas pipe);
2. Replace the sensor for the
expansion valve C (gas pipe);
3. Replace the outdoor control
board.
Expansion valve D
(gas pipe) sensor
fault
1. The wiring of the sensor for
the expansion valve B (gas
pipe) is connected loosely;
2. The sensor of the expansion
valve D (gas pipe) fails;
3. The sampling circuit fails.
1. Reconnect the wiring of the
sensor for the expansion valve
B (gas pipe);
2. Replace the sensor for the
expansion valve D (gas pipe);
3. Replace the outdoor control
board.
IPM fault
There are many reasons for this
failure. You can check the driver
board fault LED to further
analyze the fault code of the
drive board and to learn about
what leads to the fault and how
to operate it. Specific information
can be seen in table 5, table 6.
See attached "analysis of the
driving board fault".