Hitachi RAS-4-HNCE - Description of the Optional Functions

6. Optional functions
157
SMGB0079 rev.0 - 01/2013
6
6.2.2 Description of the optional functions
Control of the indoor unit fan during Thermo-OFF in heating mode (FA)
Press PSW1 and select the setting condition “1” at the circulator function at heating thermo-OFF “FA”.
In case that the fan speed is changed to “LOW” at heating Thermo-OFF, there is a case that the room air temperature is
too high at heating Thermo-OFF.
In this case, the circulator function at heating thermo-OFF is recommended, and its function explains below.
The indoor fan operates for 2 minutes and stops for 6 minutes as a cycle when the activation conditions are satised.
• Operation
When the indoor unit is at thermo-OFF during the heating operation, the indoor fan operates and stops for 6 minutes in 2
minute cycles
Fan Motor Operation
2 (min.)
Fan Motor Stop
6 (min.) 2 (min.) 6 (min.)
N O T E
Whentheindoorfanisstoppedbyanothercontrol,itisnotavailabletooperateindoorfans.
Night mode (Low noise) (ni)
Press PSW1 and select the setting condition “1” at the night shift (low noise) “ni“. Then, this function can be set (only in
cooling operation).
The outdoor fan operation is controlled by fan controller as shown below.
The night shift operation shall be applied in case that the cooling capacity has the margin to be allowed for the capacity
decrease and the low sound operation is required especially in the nighttime.
• Outdoor Fan
Maximum
Rotation
(Rotation Ratio)
22 25
60%
80%
110%
30 33
Outdoor Temperature (
o
C)
N O T E
Whentheoutdoortemperatureislowerthen30
o
Cinthecoolingoperation,thecompressorfrequencyandthe
outdoorfanspeedwillbeoperatedlow.Inthiscase,thecoolingcapacitydecreasestoapproximately60%atthe
sametime.