Hitachi RCI-1.0FSN3 Service Manual page 248

6 Optional functions
d3 – Power supply ON/OFF 2
This function is used to restart the unit after a power cut taking more than 2 seconds. The standard unit starts automatically
under the same operating conditions, such as the operating mode, etc. in the case of an electrical fault lasting for a
maximum of 2 seconds.
The compressor unit restarts after three minutes plus the maximum 2 seconds of the fault.
C A U T I O N
When this function is used without anyone controlling the unit, set the system monitoring mode to avoid risks.
d4 – Cooling air temperature drop prevention
This function is useful when the thermostat on/off conditions must be changed and a decrease in discharge air temperature
must be avoided. As a result, the perception of draughts is prevented.
• Thermostat off conditions (thermostat switched off when the discharge air temperature is low):
- Cooling operation (including dry operation).
Indoor air discharge temperature <11 °C maintained for 3 minutes.
-
• Thermostat on conditions (thermostat switched off when the discharge air temperature is low):
- Indoor discharge air temperature >13 °C.
The thermostat will switch on depending on the indoor discharge air temperature.
-
d5 – Heating air temperature drop prevention.
This function prevents a drop in the air temperature by decreasing the fan speed, apart from the settings on the remote
control.
d6 – Room temperature control for energy saving
This function is useful when energy must be saved automatically. The outdoor air temperature thermistor detects that the
air conditioning charge is low, in line with the outdoor temperature.
d7 – Not used
E1 – KPI ventilation mode
This function is used to set the unit ventilation mode with energy / heat recovery
This function is useful to set the heat exchanger ventilation mode. The setting condition and ventilation mode are shown
below:
Setting
Effective ventilation mode selection (ventilation with total heat exchanger or ventilation bypass) to save
00
01
02
E2 – Increasing air supply volume
This function is useful when the air supply volume must be increased using the high-speed, one-way valve on the fan
motor during total heat exchanger operations. This increases the pressure in the room with greatest air volume in relation
to adjoining rooms and prevents the entry of contaminated air or unpleasant smells.
The following table shows the air flow rate setting using the remote control and the actual air flow rate of the total heat
exchanger when this function is enabled.
236
SMGB0077 rev.0 - 01/2013
Setting condition
energy by detecting the difference in temperature between indoors and outdoors.
Heat is exchanged continuously when the heat exchanger is started.
Heat is not continuously exchanged when the heat exchanger is started.
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