Hitachi RAS-(4-12)HNP(1)(E) - Slo (Fan Speed) Defrost Setting (Bj); Cancellation of Outdoor Hot Start Limit; Long Piping Setting (Nu); Compressor Frequency Control Target Value for Cooling (Control Function “Hc”)

6 Optional functions
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SMGB0087 rev.0 - 12/2013
Slo (Fan Speed) defrost setting (bJ)
Press “PSW1” and select the setting condition “1” at the slow defrost setting “bJ“.
Indoor fan operation is stopped during the defrost operation.
Settingcondition Indoorfanoperation
0 Indoor fan stop during defrost operation
1 Indoor fan SLo during defrost operation
Cancellation of outdoor hot start limit (H)
Press “PSW1” and select the setting condition “1” at the cancellation of hot start setting “H”, so the hot start protection
control can be canceled.
Long piping setting (nU)
Press “PSW1” and select the setting condition “1” at the long piping setting “nU”.
If cooling capacity or heating capacity is not enough under the long-distance piping condition, this function can be set the
target compressor frequency higher than normal target value.
Compressor Frequency Control Target Value for Cooling (Control Function “Hc”)
Press “PSW1” and select the setting condition “1” in Compressor Frequency Control Target Value for Cooling “ ”. By set-
ting this function, the maximum compressor frequency and the target compressor frequency can be set higher than usual.
However, the maximum compressor frequency does not increase depending on the models.
Compressor Frequency Control Target Value for Heating (Control Function “Hh”)
Press “PSW1” and select the setting condition “1” in Compressor Frequency Control Target Value for Heating “ ”. By set-
ting this function, the maximum compressor frequency and the target compressor frequency can be set higher than usual.
However, the maximum compressor frequency does not increase depending on the models.
Indoor Expansion Valve Opening during Heating Operation Stoppage (Control Function “5i”)
Press “PSW1” and select the setting condition “1” or “2” in Indoor Expansion Valve Opening during Heating Operation
Stoppage “ ”. This function is utilized to change the indoor expansion valve opening during heating operation stoppage.
Indoor Expansion Valve Opening during Heating Thermo-OFF (Control Function “5o”)
Press “PSW1” and select the setting condition “1” or “2” in Indoor Expansion Valve Opening during Heating Thermo-OFF “
”. This function is utilized to change the indoor expansion valve opening during heating Thermo-OFF.
Indoor Expansion Valve Initial Opening at Start of Heating Operation (Control Function “ ci”)
Press “PSW1” and select the setting condition “1” or “2” in Indoor Expansion Valve Initial Opening at Start of Heating Op-
eration “ ”. This function is utilized to change the indoor expansion valve initial opening at the start of heating operation.
Low Noise Setting (Control Function “db”)
Press “PSW1” and select the setting condition “0” to “3” in Low Noise Setting “ ”. Unlike Night-Shift, the maximum compres-
sor speed (for cooling and heating operation) can be set lower than usual regardless of the outdoor ambient temperature.
While this function is set, cooling or heating capacity also decreases to 80, 70, and 60% depending on the setting.
Maximum Compressor Frequency
Outdoor
Unit(HP)
CoolingOperation HeatingOperation
% Speed
db = 0 db = 1 db = 2 db = 3 db = 0 db = 1 db = 2 db = 3
100% 80% 70% 60% 100% 80% 70% 60%