Hitachi UTOPIA RAS-4HVRP2E - Change of Heating Thermo-OFF Opening Degree of the Expansion Valve (So); Heating Start Opening Degree Change (CI); Low Noise Setting (Db)

6 Optional functions
RAS-3HVRC2
SMGB0136 rev.0 - 07/2021
119
6
6.1.3.12 Change of heating Thermo-OFF opening degree of the Expansion Valve (S)
The opening degree of the expansion valve of the heating Thermo-OFF unit can be changed by setting the heating
Thermo-OFF opening degree “S” to “1” or “2” in the function selection.
Setting condition Operation mode
0 Not available (default setting)
1 Indoor Expansion Valve Operating during Heating Thermo-OFF 1
2 Indoor Expansion Valve Operating during Heating Thermo-OFF 2
6.1.3.13 Heating start opening degree change (ci)
By setting the heating start opening degree change “ci” to “1” or “2” in the function selection, the expansion valve
opening degree for heating start can be changed.
Setting condition Operation mode
0 Not available (default setting)
1 Outdoor Expansion Valve Initial Opening for Heating 1
2 Outdoor Expansion Valve Initial Opening for Heating 2
6.1.3.14 Low noise setting (db)
By setting the operation noise reduction setting “db” to “1” to “3” in the function selection setting, the operation noise
reduction specication can be set. Unlike the night shift setting, the compressor frequency is set lower than normal for
both cooling and heating regardless of the outdoor air temperature.
In this case, the cooling and heating capacity will be reduced to 80%, 70%, and 60%, respectively.
Press PSW1 and select the setting condition “0” to “9” at the low noise setting “db” to reduce the upper limit compressor
frequency.
Setting condition Compressor frequency limit
Operating noise
(dB targeted value)
0 Not available (default setting) Not available (default setting)
1 80% Low Noise Setting 1
2 70% Low Noise Setting 2
3 60% Low Noise Setting 3
4 80% Low Noise Setting 1
5 70% Low Noise Setting 2
6 60% Low Noise Setting 3
7 80% Low Noise Setting 1
8 70% Low Noise Setting 2
9 60% Low Noise Setting 3
? NOTE
Bysettingthisfunction,thecompressorfrequencyandtheoutdoorfanmotorrotationfrequencyareforciblyreducedandsotheoutdoor
unitcapacitydecreasesandtheunitoperationrangeislimited.