Midea MGA-D16/SN1

MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz
41
E3: Inlet water temperature sensor checking channel is abnormal
E4: Outdoor ambient temperature sensor checking channel is abnormal
LED indicates E3
Check whether the wiring of inlet water temperature
sensor is broken.
Yes
Connect the wiring well.
Check whether the inlet water temperature sensor is
broken: see whether the resistance of inlet water
temperature sensor is wrong.
No
Yes
Replace the inlet water temperature sensor.
LED indicates E4
Check whether the wiring of outdoor ambient
temperature sensor is broken.
Yes
Connect the wiring well.
Check whether the outdoor ambient temperature
sensor is broken: see whether the resistance of
outdoor ambient temperature sensor is wrong.
No
Yes
Replace the outdoor ambient temperature
sensor.
Replace the PCB.
No
Replace the PCB.
No