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-TechManual_SRK05,09,12CR-S,CRR-S,CRP-S

'15 • SRK-T-171 (7)

'15 • SRK-T-171 (7) Outline of cooling operation (a) Operation of major functional components in cooling mode Cooling Thermostat ON Thermostat OFF Failure Compressor ON OFF OFF Indoor fan motor ON ON ON Outdoor fan motor (b) Fan speed switching ON OFF OFF Model Fan speed All model AUTO HI MED LO Auto fan control Speed 6 Speed 4 Speed 3 (8) Outline of automatic operation (a) Determination of operation mode The unit checks the room temperature, determines the operation mode, and then begins in the automatic operation. Room temperature

(9) Protective control function (a) (b) (c) (d) (e) Frost prevention for indoor heat exchanger (During cooling or dehumidifying) (i) Operating conditions 1) Indoor heat exchanger temperature (Th2) is lower than 2.5ºC. 2) 3 minutes elapsed after the start of operation. (ii) Detail of frost prevention operation Compressor Indoor fan Outdoor fan OFF Protects the fan tap just before frost prevention control. Depending on the stop mode (iii) Reset condition: Indoor heat exchanger temperature (Th2) is higher than 15ºC. Indoor fan motor protection When the airconditioner is operating and the indoor fan motor is turned ON, if the indoor fan motor has operated at 300 min -1 or under for more than 30 seconds, the unit enters first in the stop mode and then stops the entire system. TIMER light illuminates simultaneously and the RUN light flashing 6-time at each 8-second. 3 minutes forced operation When the compressor begins operating the thermal operation is not effective for 3 minutes, so operation continues as is in the operation mode. (After 3 minutes has passed the thermal operation is effective.) However, stopping the compressor via a stop signal or protection control has priority. Abnormality of outdoor unit After the compressor run 5 minutes, and the indoor heat exchanger temperature more than 25ºC continuously more than 40 minutes, then the abnormality stop occurs. Sensor disconnection (room temperature, indoor heat exchanger) (i) (ii) Room temperature sensor If the temperature detected by the room temperature sensor is – 45ºC or lower, continuously for 15 seconds or longer, then operation is stopped, an error indication is displayed. (RUN light: 2-time flash, TIMER light: ON) Indoor heat exchanger temperature sensor If the temperature detected by the indoor heat exchanger temperature sensor is –28ºC or lower, continuously for 15 seconds or longer, then operation is stopped, an error indication is displayed. (RUN light : 1-time flash, TIMER light : ON) - 61 - '15 • SRK-T-171

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