Haier HSU18VH7 Service Manual

Also see for HSU18VH7: Operation manual Installation manual Installation manual Manual Manual

Contents

- 6 -Air conditioner Edition: 10070808State1State2State3Ts-1 Ts Ts+2 Ts+3Warm start (preventing cold wind when heating running begins, applicable tofan-coil model))When heating running begins, indoor fan will conduct the following fan control:If the temperature of indoor coil pipe is ≥ 23℃, start lower wind speed;If the temperature of indoor coil pipe is ≥ 38℃ or the running time ofcompressor≥ 4 minutes, turn to setting wind speed.Control of indoor fan under heating OFF state (applicable to fan-coil model)Under heating state, the compressor will cease; if the indoor coil pipe’stemperature Tp≥23℃, indoor fan will run in lower wind speed.Defrosting control (applicable to fan-coil model)Defrosting beginning condition:a. After the state of Tp-Tr<16℃ is continued for 5 minutes, the accumulatedrunning time of the compressor exceeds 45 minutes, the continuous runningtime of the compressor exceeds 20 minutes;b. The accumulated running time of the compressor exceeds 3 hours, thecontinuous running time of the compressor exceeds 20 minutes, indoorunit’s Tp <38℃;c. The continuous running time of the compressor exceeds 20 minutes, thetemperature of indoor coil pipe decreases 1℃ every 6 minutes, which lastsfor more than 3 times, indoor unit’s Tp <38℃;d. When the indoor unit is in the state of overload protection and the outdoorunit ceases, when the rerunning time of outdoor unit exceeds10 minutes, theaccumulated running time of the compressor exceeds 45 minutes, thecontinuous running time of the compressor is over 20 minutes, and Tp <38℃.Defrosting will begin if one of the above conditions is met.Defrosting finishing condition:If the defrosting time exceeds 9 (for 12 models)or 7 (for 07,09 models)minutes,the original heating state will be resumed;3.2.43.2.53.2.6