Haier HSU-18HEA03/R2(DB)-I Service Manual

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Haier HSU-18HEA03/R2(DB)-I Service Manual Manual pdf 21 page image

HSU-18HEA03/R2(DB)-I Funcitions and ControlDomestic Air Conditioner19If a single machine causes defrosting, the other machines all involve in defrosting.D. The conditions of withdrawing from defrostingThe defrosting operation will change to heating operation, if any of the following conditions isVDWLV¿HG(1) The temperature of the outdoor heat exchanger is continuously over 7°C for 80 seconds.(2) The temperature of the outdoor heat exchanger is continuously over 12°C for 5 seconds.(3) Continuously run defrosting for 11 minutes (56 digits in EEPROM can be adjusted).E. When satisfying the conditions of withdrawing from defrosting, the machine works as thefollowings:The compressor stops, the outdoor fan is started, and the four-way valve is closed, after 60 seconds thecompressor runs according to the starting process.5.2.5 Protection function5.2.5.1 TTC high temperature-preventing protectionOnce the machine is started, it can run TTC overheating protection of air-blowing, but air-blowing sensormalfunction must alarm after 4 minutes during which the compressor is started (during the course of self-detection, there’s no such limitation)Sensor detection PHWKRGV 100 times (one cycle of procedure run is one time, and about 5ms, detectionmethod for each WLPH continuously sampling for 8 times, then order them and take the mean value of themiddle 2 values), take the mean value.TTCAbnormal stop117ecreasing the frequency rapidly 1HZ/second112Decreasing the frequency slowly (1HZ/10seconds)The frequency doesn’t change.ncreasing the frequency 1HZ/1secondTC>=117°C lasts for 20 seconds. Overheating protection of air-blowing, alarm malfunction to the indoor,others don’t last.5.2.5.2 TC high temperature-preventing control of the indoor heating unitTpg_indoor is the highest value of the effective indoor unit (start it and it is in accord with the runningstate).The indoor heat exchanger sensor tests the temperature of the indoor heat exchanger. If the temperatureis higher than 55°C, decrease the rotate speed of the compressor and do the high temperature-preventing protection of the indoor heat exchanger; if the temperature of the indoor heat exchanger islower than 47°C, recover to the normal control.ID10810598