Sinclair SDV5 Series Service Manual page 54

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
2.12 EP: Outdoor ambient temperature is lower than -5
2.12.1 Digital display output
EP
2.12.2 Description
 Outdoor ambient temperature is lower than -5℃ in cooling operation.
 The system stops running.
 Error code is displayed on outdoor unit PCB.
2.12.3 Trigger / recover condition
 Trigger condition: Outdoor ambient temperature is lower than -5℃ in cooling operation.
 Recover condition: Outdoor ambient temperature is over -5℃.
 Reset method: Resume automatically.
2.12.4 Possible causes
EH
PCB is loose
No
or failed
No
Yes
Ensure the sensor is connected properly
Yes
Replace the sensor
in cooling operation (For all models)
℃
53