Hitachi PC-ARF Technical Catalogue page 93

4 Individual remote controls
PC-ARF
d4 - Prevention for Cooling Discharge Air Temperature Decrease
This function is utilized to change Thermo-ON/OFF conditions during the cooling operation and prevent the discharge air
temperature decrease. As a result, the perception of cold draft is prevented.
• Thermo-OFF Conditions
a. Cooling Operation (including Dry Operation) and
b. Indoor discharge air temp. < 11
(Thermo-OFF is activated when discharge air temperature is low.)
• Thermo-ON Conditions
a. Indoor discharge air temp. > 13
b. Thermo-ON depending on indoor inlet air temperature
(Thermo-ON is Not activated when discharge air temperature is low.)
d5 - Prevention for Heating Discharge Air Temperature Decrease
This function is utilized to prevent discharge air temperature decrease during the heating operation by making the actual
fan speed lower than the speed indicated on the remote control switch.
Indications on Remote Control Switch
d6 - Room Temperature Control for Energy Saving
This function is utilized to automatically save energy. If the outdoor temperature air thermistor detects from the outdoor
temperature that the air-conditioning load is low, the setting temperature automatically shifts into the energy-saving
mode.
d7 - Not Prepared
E1 - Ventilation Mode (for Total Heat Exchange Model)
Not Used (Use as 00 conditions)
E2 - Increasing Supply Air Volume ( for Total Heat Exchange Model)
Not Used (Use as 00 conditions)
E3 - Not Prepared
E4 - Precooling/Preheating Period (for Total Heat Exchange Model)
Not Used (Use as 00 conditions)
E5 - Not Prepared
E6 - Indoor Fan Operation Time After Cooling Operation Stoppage
This function is utilized to prevent moulds and an unusual odour. When this function is utilized, The unit continues
"SLOW" indoor fan operation (for 60 or 120 minutes depending on the setting) even during cooling operation stoppage
and thereby prevents dew condensation, drying the unit.
E7 - Not Prepared
E8 - Fan Operation Control during Heating Thermo-OFF
This function is utilized to prevent the perception of cold draft by reducing the indoor fan speed during heating Thermo-
OFF.
Setting Condition
E9 - Not Prepared
77
TCGB0106 rev.0 - 12/2014
C for 3 minutes
o
C and
o
Actual Fan Speed
Fan Operation during Thermo-OFF
00
01
Large Fan Speed
HIGH MED
MED LOW
LOW
SLOW
Small
LOW
LOW
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