Protection Control SiEBE18-52670 Function4.3 Discharge Pipe Protection ControlThis discharge pipe protection control is used to protect the compressor internal temperatureagainst a malfunction or transient increase of discharge pipe temperature.INV compressororWhen occurring 3 times within 100 minutes,the malfunction code "F3" is output.(V3177)Discharge pipetemp. control standbyHTdi>135°CHTdi>115°C for 10 min. or more.oror30 sec.In discharge pipe protection control&&oror&Discharge pipe protection control not limitedKeep the current stepINV frequency 1-step down fromcurrent compressor frequency(lower limit: 52Hz)INV upper limit frequency:1-step up from currentcompressor frequencyExclusion ofthe rightconditionsFix INV frequency 52Hz• HTdi>130°C• HTdi>115°C for 90sec. or more• Tp>140°C• HTdi<100°C• Tp<115°CCooling: 20 sec.Heating: 60 sec.• HTdi>110°C• Tp>130°C• Not during defrost operation(preparation ~ post operation)• Not during oil return operation in heating(preparation ~ post operation)• Not during oil return operation in cooling(without preparation and post opeation)• HTdi>105°C• Tp>130°C• Defrost operation(preparation ~ post operation)• Oil return operation in heating(preparation ~ post operation)• Oil return operation in cooling(without preparation and post operation)• HTdi<95°C• Tp<100°CHTdi: Value of INV compressor discharge pipetemperature (Tdi) compensated withoutdoor air temperatureTp: Value of compressor port temperaturecalculated by Tc and Te, and suctionsuperheated degree.
