Midea HD-676REWN, Service Manual

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Service Manual_2020-V3.0
44
LED
①④
flicke at the
same time
Ambient
temperature
sensor fault
Step 1 : Check whether the connection terminals are plugged in place
and whether there are foreign matters in them; after cleaning the
terminals, plug them in again.
Step 2 : If the fault still occurs, pull out the corresponding connection
terminal on the main PCB, use a multimeter to check the resistance
value of the sensor, and confirm whether it is normal.
Step 3 : If the resistance value is wrong, replace the sensor.
Step 4 : If the fault still occurs, replace the main PCB.
9.7 Defrosting function mode
Defrost in the freezing chamber1
）
Defrost the freezing chamber as per the accumulative operation time
of the compressor.
2
）
If power failure occurs abruptly to the compressor and the sensor in freezing chamber is less than 0
o
C
after powering on, then first conduct defrosting once. If more than 0
o
C , then defrosting is not needed.
After that, conduct defrosting according to using condition and ambient temperature in a period between
6 and 24 hours as per the accumulative operation time of the Compressor.
Defrost in refrigerating chamber
1) Start Condition: Refrigerate accumulated refrigeration over 6 hours, begining to defrost.
2) Exit condition: Exit the defrost when one of the following conditions is met
A.
Trd ≥ 10
℃
B.
Frosting time in the freezer ≥ 60 min
9.8 test mode
Test items Testing Method Expected result
Select to
enter into
forced
cooling
mode
Press and hold the refrigerating
button and the freezing button 3s
to enter the forced operation
mode(as shown picture 1), then
press the freezing button to adjust
to the picture 2 state, and the lock
will take effect.
1
2
LED
①④⑤
lit at the same time, the
compressor operation, cooling fan in the most
upscale run.
1
、
In forced cooling mode, if no
button is pressed within 36
hours,
2
、
Or press the thermostat button
for 2 times in the mode operation
then the refrigerator will exit the mode and
return to normal operation mode
Select to
enter into
forced
defrosting
mode
Press and hold the refrigerating
button and the freezing button for 3
seconds to enter the forced
running setting mode (as shown in
the picture 1), and then press the
freezing button twice to adjust to