ESIE05-03 General FunctionalityPart 2 – Functional Description 2–19324511.14 Defrost OperationOutline When the unit is operating in heating mode, a defrost operation will be conducted in order to avoid iceformation on the outdoor unit heat exchanger.Defrost startingconditionsDefrost will start when the following conditions have been realized:Areas Defrost upper limit AP Integrated compressor running time is 25 minutes or more sincethe completion of the previous defrost operation.&ORP Defrost upper limit time A is met.P Low pressure saturated temperature (Te) is within thedefrost requesting area. (RZQ71)P Outdoor unit heat exchanger area temperature (Tb) iswithin the defrost requesting area.Defrost prohibiting areaDefrost permitting areaEvaporating temperature Te (°C)orOutdoor unit heat exchanger temperature Tb (°C)When slightly quick defroststarting is setFactory settingWhen slightly slow defroststarting is setWhen slightly quick defroststarting is setDefrost requesting areaWhen slightly quick defroststarting is setFactory settingOutdoorTemp. TA °CWhen quickdefrost starting isset 16(26)-3-03Factory setting16(26)-3-01When slowdefrost starting isset 16(26)-3-02Outdoor temperature > -5°C 40 minutes A hours 6 hoursOutdoor temperature ≤ -5°C 40 minutes 6 hours 8 hoursA hoursRZQ71 3 hoursRZQ100~140 2 hours
