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Service Manual
(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.
Technical Information
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