Midea MOA-07HN1-QC2, Руководство по обслуживанию

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9.2.2 Open or short circuit of temperature sensor diagnosis and solution.
9.2.3 Over current protection occurs 4 times.
Yes
Disconnect with the power and
replace the main PCB
No
Check if the operation condition is
normal, especially the outdoor unit?
Check if the
compressor
is normal
Yes
Yes
Turn on the units and check if the
problem remains
Yes
Check if the voltage of the power supply is too low
No
No
Replace the
compressor
Yes
Check if the
capillary is
blocked
Yes
No
There is some air
mixed inside the
refrigerant system
Evacuate the
refrigerant
system and
recharge gas
Repair the power supply
Correct the operation condition
Replace the
capillary
Yes
Replace the PCB
Yes
Check the connections between
the sensors and the PCB. Are the
connections good?
Replace the sensor and check if
the errors happen again?