Hitachi UTOPIA RAS-4HVRP2E - Circulator Function at Heating Thermo; Circulator Function at Heating Thermo-OFF (FA); Night-Shift (Low Noise); Night-Shift (Low Noise)(Ni)

6 Optional functions
RAS-(4-6)H(V)(R/N)(C/P)2E
SMGB0136 rev.0 - 07/2021
135
6
6.2.3.3 Circulator function at heating Thermo-OFF (FA)
Press PSW1 and select the setting of the condition “0” to “1” of the indoor unit fan control during the Thermo-OFF in
heating mode “FA”.
Normally, the fan speed is changed to “LOW” at heating Thermo-OFF. (There is a case that the room temperature is too
high at the heating Thermo-OFF.) However, the indoor fan motor is operated at “LOW” and stopped repeatedly by setting
this function.
? NOTE
• Whenthecompressorisstopped,theindoorfanmotoroperatesat“LOW”speedcontinuously.
• Thermo-ON:Theindoorunitisrunning.
• Thermo-OFF:Theindoorunitstayson,butdoesn’trun.
The action when the indoor fan motor operates at the circulator function indicated as follows.
6
2 2
6
Fan motor operation
Fan motor stop
? NOTE
IncaseusingthefunctionsettingNumber2to4,installtheremotesensor(THM-R2A:Optional).Becausethetimeperiodofstoppingthe
indoorfanbecomeslonger,thedetectedvalueofthesuctionairthermistorforindoorunitbecomeshigh,anditmaytaketimetoThermo-
ON.
6.2.3.4 Night-shift (low noise)(ni)
Press PSW1 and select the setting for condition “0” or “1” of the night shift (low noise) “ni” consequently, the function
can be set. “ni”=1 reduces the upper limit of the outdoor fan rotation and the compressor frequency as shown below in
cooling operation.
The night shift operation shall be applied in case the cooling capacity has the allowed range to decrease the capacity
and the low noise level operation is required especially at night.
“ni” Setting
Condition
Operation
Reduction Rate of Maximum
Outdoor Fan Rotation Compressor Frequency
Cooling (Including Dry Operation) Cooling (Including Dry Operation)
0
No Effect
(Default Setting)
Not Changed (=100%) Not Changed (=100%)
1 Night Shift Shown as below 60%
22 25
75%
80%
90%
30 33
Reduction rate
of upper limit
outdoor fan
rotation
Outdoor temperature (ºC)
at Cooling Operation
? NOTE
• Reductionratesareapproximate,thesemaychangeslightlydependingontheoutdoorunitmodel.
• ThisfunctionsettingisnotpossibletosetwithPriorityCapacityMode(nU)andtheLowNoiseSetting(db)atthesametime.