Midea MCA3-12HRN1-Q1

DM17-01.01.08en Light Commercial R410A on-off
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2.3. Solving steps for typical malfunction
(1) For indoor unit
a. T1 or T2 temperature sensor open or short circuit
Checktheconnections
betweentemperature
sensorandPCB.Arethe
connectionsgood?
Correcttheconnections.No
Yes
No Replacethesensor.
ReplacetheindoorPCB
Measure theresistancevalue
ofthesensorviaAppendix 1
Isitnormal?
Yes
b. T3 temperature sensor open or short circuit
Checktheconnections
betweentemperature
sensorandPCB.Arethe
connectionsgood?
Correcttheconnections.No
Yes
No Replacethesensor.
ReplacetheoutdoorPCB
Measure theresistancevalue
ofthesensorviaAppendix 1
Isitnormal?
Yes