Low Noise Setting (Db); Demand Function Setting (De); Demand Function Setting - Hitachi UTOPIA RAS-4HVRP2E Service Manual

6 Optional functions
RAS-(4-6)H(V)(R/N)(C/P)2E

6.2.3.9 Low noise setting (db)

Press PSW1 and select the setting condition "0" to "9" at the low noise setting "db" to reduce the upper limit compressor
frequency and the outdoor fan motor rotation frequency.
?
N O T E
• By setting this function, the compressor frequency and the outdoor fan motor rotation frequency are forcibly reduced and so the out-
door unit capacity decreases and the unit operation range is limited.
• The operating noise values for a single unit are shown below. These are targeted values and so the actual values can temporarily be
higher depending on operation conditions. The operating noise values for combination units are higher than the values below.
Setting Compressor
condition frequency limit motor step limit
0 Not changed
1 Not changed
2 Not changed
3 Not changed
4 80%
5 60%
6 40%
7 80%
8 60%
9 40%

6.2.3.10 Demand function setting (dE)

Press PSW1 and select the settings for conditions "0" or "1" to set the demand function "dE". This function is available by
setting to "1" for the demand current control without inputting the signal to the external input terminal on the outdoor unit
PCB1. The table below is shown for the limit of the operating current for this function.
?
N O T E
If the outdoor unit running current exceeds the maximum limit for twenty minutes, the indoor unit is put under Thermo-OFF condition. In
this case, the stoppage code Number "10" is given.
Setting condition
Demand control
Adapting the self-demand function, which causes the power consumption to drop drastically for the purpose of saving
energy.
?
N O T E
• The demand current control (%) is value criterion. The value used for this control is calculated from the current, and therefore is dif-
ferent from the value indicated by a wattmeter. If it is required that the maximum power consumption is managed precisely, a field-
supplied demand controller should be used.
• The actual value may temporarily be higher than the indicated value shown above depending on the operating control conditions such
as protection control.
138 SMGB0136 rev.0 - 07/2021
Operating noise (dB targeted value)
Outdoor fan
RAS-4H(V)(R/N)(C/P)2E RAS-5H(V)(R/N)(C/P)2E RAS-6H(V)(R/N)(C/P)2E
Not changed
20 steps
18 steps
16 steps
Not changed
Not changed
Not changed
20 steps Setting 1: 68
18 steps Setting 2: 67
16 steps Setting 3: 66
0
1
Morning Daytime
Operating Hours
Catalog value
-
-
-
-
-
-
Setting 1: 68 Setting 1: 69
Setting 2: 67 Setting 2: 68
Setting 3: 66 Setting 3: 67
Demand running current control
Not available (default setting)
Value according to external input demand function
Excessive power supply consumption
exceeding the power setting range is
restricted
Power setting
Selectable from 100%, 80%,
70%, 60% and 40% of the
rated power consumption for
cooling operation.
Night
Outdoor unit capacity
(to specification)
100%
-
-
-
-
-
-
80%
60%
40%