York YU2E18YJ6AMHO-Y Service Manual

Also see for HP Series: Service manual

18If the outdoor ambient temperature is higher thanthe set frequency during oil return, the unit stopsthe oil return process.5.3.11 Low Outdoor Ambient TemperatureProtectionWhen the compressor is off and T4 is lower than -35℃ for 10 seconds, the unit stops and displays“LP.”When the compressor is on and T4 remains lowerthan -40℃ for 10 seconds, the unit stops anddisplays “LP.”When T4 is no lower than -32℃ for 10 seconds,the unit exits protection.5.4 Control and Functions5.4.1 Capacity Request CalculationFor Old Console series, Old Duct/Cassette/FloorCeiling, Old Vertu/Luna Series:Total capacity Request=Σ(Norm code × HP) /10×modify rate+ correctionFor All new models(New Wall mounted(Hi-Wall)series, New Duct/Cassette/Console/Floor Ceiling):Total capacity Request=Σ(Norm code × HP) /40×modify rate+ correctionCooling Mode:T1 Ts311eca 4202301fdbCapacity area a b c d e fNorm code (N) 3 2 1.5 1 0.5 0Model 9K 12K 18K 24KHP 1.0 1.2 1.5 2.5Note: The final result is an integer.Use the following table and final capacityrequest to confirm the operating frequency.Frequency (Hz) 0 COOL_F1COOL_F2……COOL_F24COOL_F25Amendatorycapacitydemand.0 1 2 …… 24 25The maximum running frequency is adjustedaccording to the outdoor ambient temperature℃5554 Fmax= T4FREMAXC051.550.5 Fmax= T4FREMAXC145.544.5 Fmax= T4FREMAXC23938 Fmax= T4FREMAXC33332 Fmax= T4FREMAXC43029 Fmax= T4FREMAXC52220 Fmax= T4FREMAXC6108 Fmax= T4FREMAXC70-2 Fmax= T4FREMAXC8-10-12 Fmax= T4FREMAXC9Fmax= T4FREMAXC10Heating ModeT1 Ts40a31-13120bcdef2