Basic Control SiEBE18-52656 Function2.2 Compressor PI ControlCompressor PI ControlCarries out the compressor capacity PI control to maintain Te at constant during coolingoperation and Tc at constant during heating operation to ensure stable unit performance.[Cooling operation]Te changes corresponding to the capacity which indoor units require the above as the initialvalue. (However -7 ≤ Te ≤ 15)[Heating operation]Tc changes corresponding to the capacity which indoor units require the above as the initialvalue. (However 42 ≤ Tc ≤ 51)Controls compressor capacity to adjust Te toachieve target value (TeS). Te : Low pressure equivalent saturationtemperature (°C)TeS initial value TeS : Target Te value(Varies depending on Te setting, operatingfrequency, etc.)Condition L M (Normal)(factory setting) H∆D up 3 6 9∆D keep 12 12 12∆D down 12 12 13Controls compressor capacity to adjust Tc toachieve target value (TcS). Tc : High pressure equivalent saturationtemperature (°C)TcS initial value TcS : Target Tc value(Varies depending on Tc setting, operatingfrequency, etc.)L M (Normal)(factorysetting)H43 46 49RMXS112 · 140 · 160DSTEP INV1 52Hz2 57Hz3 62Hz4 68Hz5 74Hz6 80Hz7 86Hz8 92Hz9 98Hz10 104Hz11 111Hz12 118Hz13 124Hz14 129Hz15 134HzSTEP INV16 140Hz17 146Hz18 152Hz19 158Hz20 164Hz21 170Hz22 175Hz23 180Hz24 185Hz25 190Hz∗ Compressors may operate in a pattern other than those listed in above tables subject to the operating conditions.
