Midea ATOM B Series Service Manual page 60

2.11 EH: Refrigerant radiator temperature sensor error (For all models)
2.11.1 Digital display output
EH
2.11.2 Description
 Refrigerant radiator temperature TL sensor error.
 The system stops running.
 Error code is displayed on outdoor unit PCB.
2.11.3 Trigger / recover condition
 Trigger condition: TL temperature sensor is open circuited (or connecter loose) or short circuited.
 Recover condition: The main control board can receive a normal feedback signal of TL sensor.
 Reset method: Resume automatically.
2.11.4 Possible causes
 TL temperature sensor damaged.
 TL temperature sensor connect to the main control board is loose.
 Main PCB damaged.
2.11.5 Procedure
Temperature sensor connection on main
Temperature sensor has short-circuited
Replace outdoor main PCB
EH
PCB is loose
No
or failed
No
Atom B Series VRF 50/60Hz
Yes
Ensure the sensor is connected properly
Yes
Replace the sensor
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