Haier HSU09 VHG(DB)-G&W Service Manual

Contents

HSU09VHG(DB)-SM Functions and control22Domestic Air Conditionerwhite—the background light turns to white—the background light is fully lighted for 0.5 second—LEDscreen lights for 0.5 second— the step-in motor fully output for 0.5 second—then the motor doesn’toutput for 0.5 second—the motor fully output again for 0.5 second. The test program finishes.5.1.20 Time cutting function:connect the test program terminal on the mainboard after connecting the system to the power circuit.The CPU of the main control will be 60 times faster.5.2 The control system of outdoor unit5.2.1˖The operation frequency of outdoor unit and its control5.2.1.1˖The operation frequency control of compressorThe operation frequency scope of compressor˖Mode Minimun operation frequency Maximun operation frequencyHeating 36Hz 90HzRefrigeration 36 Hz 80Hz5.2.1.2˖The starting of compressorWhen the compressor is started for the first time, it must be kept under the conditions of58Hz,88Hz for one minute (the overheating protection of the outdoor unit air-blowing temperature,immediately decrease the frequency when the compressor is overflowing and releasing thepressure)ˈthen it can be operated towards the target frequency. When the machine runs normally,there’s no such process. After starting the compressor for operation, the compressor should runaccording to the calculated frequency, and every determined frequency for protection should be priorto the calculated frequency.5.2.1.3˖The speeds of increasing or decreasing the frequency of the compressorThe speed of increasing or decreasing the frequency rapidly 1 -----------1HZ/secondThe speed of increasing or decreasing the frequency slowly 2 -----------1HZ/10seconds5.2.1.4˖The calculation of the compressor’s frequency1˅ǃThe minimum/maximum frequency limitationAˊWhile refrigerating: ˢˉ˩˝˴ˉ̎ is the maximum operation frequency of the compressor;ˢˉ˩INˉ̎ is the minimum operation frequency of the compressor.BˊWhile heating: ˢˉ˩˝˴ˉ̀ is the maximum operation frequency of the compressor; ˢˉ˩INˉ̀ is the minimum operation frequency of the compressor.1˅ǃThe frequency limitation which is affected by the environment temperature.Heating mode:Serial No. Temperature scope Frequency limitation1 Wh_c<-12 Max_hz8 90 HZ2 Wh_c<-8 Max_hz7 90HZ3 Wh_c<-2 Max_hz4 90 HZ4 Wh_c<5 Max_hz5 85HZ