Control Specification SiUS041501E41 Function and Control3.6 Freeze-up Protection ControlDuring cooling operation, the signal sent from the indoor unit determines the frequency upper limitand prevents freezing of the indoor heat exchanger. (The signal from the indoor unit is divided intozones.)The operating frequency limitation is judged with the indoor heat exchanger temperature.3.7 Heating Peak-cut ControlDuring heating operation, the indoor heat exchanger temperature determines the frequency upperlimit to prevent abnormal high pressure.The operating frequency limitation is judged with the indoor heat exchanger temperature.(R21660)Reset zoneIndoor heat exchangerthermistor temperatureUp zoneKeep zoneDropping zoneStop zone13˚C (55.4˚F)(Reference)7˚C (44.6˚F)5˚C (41.0˚F)3˚C (37.4˚F)0˚C (32.0˚F)09/12 class RXN18NMVJURX18NMVJU24 class(°C) (°F) (°C) (°F)A 59 138.2 60 140.0B 55 131.0 54 129.2C 52 125.6 51 123.8D 50 122.0 49 120.2E 45 113.0 44 111.2Zone ControlStop zone When the temperature reaches the stop zone, the compressor stops.Dropping zone The upper limit of frequency decreases.Keep zone The upper limit of frequency is kept.Up zone The upper limit of frequency increases.Reset zone The upper limit of frequency is canceled.Indoor heat exchangerthermistor temperatureStop zoneDropping zoneKeep zoneUp zoneReset zone(R14665)DCBAE
