Hitachi RCI-1.0FSR Service Manual page 141

5 Optional functions
Optional functions through Remote control
E1 – Econofresh cooling mode (100 % fresh air operation for cooling mode)
This function allows the outdoor air damper to be open in All Fresh operation mode. This mode allows the full opening of
the outdoor air damper (according to the control system).
E2 – KPI 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.
E2 – Econofresh enthalpy sensor
This function allows the outdoor air damper to be open in All Fresh operation mode. This mode allows the full opening of
the outdoor air damper (according to the control system).
E3 – Not used
E4 – KPI: Pre-cooling / pre-heating period
This function is useful to delay start-up of the total heat exchanger.
E4 – Econofresh: CO sensor
2
This function selects the CO
E5 – Not used
E6 – Indoor fan operation time after cooling operation stoppage
This functions prevents the condensation accumulation in the unit by keeping the fan running after it is switched off.
E7 – Not used
E8 – Fan operation control at heating Thermo-OFF
This function is useful to avoid the perception of cold draughts by stopping the indoor fan speed with the heating
Thermo-OFF. These functions are only available when using the remote sensor (THM-R2AE).
THM-R2AE Remote temperature sensor (connected to the THM4 port on the IU PCB) is required.
This function stops the fan to prevent cold draughts.
The Remote Sensor shall be installed in a proper place for the correct detection of room temperature.
Indoor unit Operation
(Heat mode)
PC-ARFP1E
Tset+1ºC
Tset-1ºC
HEAT Thermo-ON
Fan Operation
?
N O T E
• These functions are only available when using the Remote Sensor (THM-R2AE)
• When using E8 function:
- "C8=00" : this setting is not permitted
- "C8=02" : this setting is not recommended since it may cause that comfort conditions are never reached (C8 set at 02 means that
unit control is carried out with the average value of the Remote Sensor and the air inlet sensor of the indoor unit)
• In case that Automatic louver is set, the louver will keep operating in both Thermo-ON and Thermo-OFF conditions
131 SMGB0137 rev.0 - 05/2021
gas sensor input (required setting E1=00).
2
ON
Tset
OFF
Fan Stop in Heating Thermo-Off even at start-up
TH-OFF conditions
TH-ON conditions
(Compressor ON)
ON
OFF
Fan Stop in Thermo-Off after unit start-up
5