多联机维修与应用.pdf

 MentePC TU831.3+7A The Application and Analysis of VRF Maintenance Software Huang Min Yan Weidong Ma Qian ( Jiangsu Institute of Economic Trade Technology, College of Engineering, Nanjing, 210007 ) Abstract This article introduces the principle of automatic control for the MHI VRF air conditioner and expounds the primary function of MHI MentePC software from the maintenance technique. Through the analysis of actual case, the trouble source of VRF is given. The corresponding solution and maintenance technique is given in the end. Keywords VRF; operational control; protected control; maintenance software KX6 MentePC KX6 12 1 2 Fig.1 System diagram of the outdoor machine Fig.2 System diagram of the indoor machine 1963E-mail huangmin91@163.com 2011-09-28 TH thermistor 3.0MPa PSH EEV Electric Expansion Valve 3.3MPa SVSolenoid Valve PSL PSH 3.5MPa SV6 Pressure Sensor, Low PSH PSH 4.15MPa 63H Pressure Sensor, Highi indoor o outdoorA AirD PSL DischargeSsuctionSCsubcool 0.7MPa PSL H heat C crank case 0.18MPa PSL R refrigeration 0.134MPa PSL KX6 0.8MPa PSL 2.1 0.18MPa PSL 0.134MPa PSL=0.7MPa THiR THiR 1 2 THiR EEV THiR MentePC 3 3 THR THiR =