Service Manual
29
Technical Information
(7) Indoor high temperature protection (applicable for heating and auto mode)
When IDU fan motor is in turbo or high fan speed and Ttube≥56
℃
, ODU fan motor stops operation; when Ttube≤49
℃
, ODU fan
motor starts operation again.
When IDU fan motor is in medium or low fan speed and Ttube≥52
℃
, ODU fan motor stops operation; when Ttube≤46
℃
, ODU fan
motor starts operation again.
(8)Temperature sensor malfunction protection (applicable in cooling, heating, drying fan or auto mode)
①
Malfunction of indoor ambient temperature sensor: indoor unit displays F1, which means indoor ambient temperature sensor is
open-circuit or short-circuit, or its detection circuit element is broken.
②
Malfunction of indoor evaporator temperature sensor: indoor unit displays F2, which means indoor evaporator temperature sensor
is open-circuit or short-circuit, or its detection circuit element is broken.
③
Malfunction of outdoor ambient temperature sensor: indoor unit displays F3, which means outdoor ambient temperature sensor is
open-circuit or short-circuit, or its detection circuit element is broken;
④
Malfunction of outdoor condenser temperature sensor: indoor unit displays F4, which means outdoor condenser temperature
sensor is open-circuit or short-circuit, or its detection circuit element is broken;
⑤
Malfunction of outdoor discharge temperature sensor: indoor unit displays F5, which means outdoor discharge temperature
sensor is open-circuit or short-circuit, or its detection circuit element is broken.
