Hitachi RAS-2-HVNP Service Manual page 174

6. Optional functions
Fixing on demand function (dE)
Press "PSW1" and select the setting condition "1", so that the fixing of demand function "dE" can be set.
However, it is not necessary to short-circuit the demand input terminals on the outdoor unit PCB. (Refer to section
tion of optional signals in the input
The tables below is the limit of the running current for this function.
RAS-(2-2.5)HVNP / RAS-3HVNC
Control function number
(*)
1 to 4
5
6
7
(*) This function can be activated when demand function
is selected at one of the input terminal indications i1, i2
and i3. In case that multiple demand functions are set at
the input terminal indicationsi1, i2 and i3, the demand
running current is selected as below.
5 > 6 > 7
(Control function number)
• Demand Control.
Adopting self-demand function which drastically decreases power consumption has largely improved energy-saving.
Morning
Cold draft protection 1 (Fb)
Press PSW1 and select the setting condition "1" at the cold draft protection 1 "Fb", so the cold draft protection can be set.
When the minimum indoor unit discharge air temperature falls down to 12ºC and below at cooling operation, outdoor fan
stops and compressor frequency forcibly decreases to prevent a drop in discharge air temperature.
Setting condition
0
1
2
160
SMGB0079 rev.0 - 01/2013
Current control demand)
Demand running current
control
100%
60%
80%
100%
Maximum efficiency is secured
within the power setting range
Daytime Nigth
Operating hours
Temperature (ºC)
- Not available (default setting)
The cold draft is prevented by the compressor frequency
< 12 control and turning ON SVC (solenoid valve for high pres-
sure bypass circuit).
The cold draft is prevented by the compressor frequency
< 12
control.
RAS-3HVNPE / RAS-(4-12)H(V)N(P/C)(E)
Control function number
(*)
1 to 5, 10
6
7
8
9
(*) This function can be activated when demand function
is selected at one of the input terminal indications i1, i2
and i3. In case that multiple demand functions are set at
the input terminal indicationsi1, i2 and i3, the demand
running current is selected as below.
6 > 7 > 8 > 9
(Control function number)
Excesive power supply
consumption exceeding the
power setting range is
restricted
Power setting
Selectable from 100%, 80%, 70% and
60% of the rated power consumption
for cooling operation.
Condition
Descrip-
Demand running current
control
100%
60%
70%
80%
100%