Haier HSM18HEKC03/R2 Service Manual

Haier HSM18HEKC03/R2 Service Manual Manual pdf 27 page image

HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and controlDomestic Air Conditioner25and so on, are in effect. During defrosting period, the compressor which is stoped because ofprotection or malfunction will reinstate after stoping for 3 minutes, and don’t clear the cumulated runtime. When it is satisfied with the continuously running time, it will enter into the defrosting mode.After entering into defrosting mode, make sure the compressor runs for at least for 2 minutes, andthen it can withdraw from defrosting.If 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 is satisfied:˄1˅˖The temperature of the outdoor heat exchanger is continuously over 7 for 80 seconds.ć˄2˅˖The temperature of the outdoor heat exchanger is continuously over 12ć for 5 seconds.˄3˅˖Continuously run defrosting for 11 minutes˄56 digits in EEPROM can be adjusted˅.EˊWhen 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 secondsthe compressor runs according to the starting process.5.2.6 Protection function5.2.6.1˖TTC high temperature-preventing protectionOnce the machine is started, it can run TTC overheating protection of air-blowing, but air-blowingsensor malfunction must alarm after 4 minutes during which the compressor is started (during thecourse of self-detection, there’s no such limitation)Sensor detection methods: 100 times (one cycle of procedure run is one time, and about 5ms,detection method for each time: continuously sampling for 8 times, then order them and take themean value of the middle 2 values), take the mean value.TTC˄ć˅117 Abnormal stopDecreasing the frequency rapidly˄1HZ/second˅112Decreasing the frequency slowly (1HZ/10seconds)108105 The frequency doesn’t change.Increasing the frequency (1HZ/10second)98Increasing the frequency˄1HZ/1second˅TTC>=110ć lasts for 20 seconds. Overheating protection of air-blowing, alarm malfunction to theindoor, others don’t last.5.2.6.2˖TC high temperature-preventing control of the indoor heating unit˖Tpg_indoor is the highest value of the effective indoor unit (start it and it is in accord with the running