Automatic Cooling And Heating Operation - Hitachi RASC-4HNPE Service Manual

5 Control system
Standard operation sequence

5.3.4 Automatic cooling and heating operation

Auto cool/heat
operation
I.U
air intake
temperature
Cooling operation
I.U
air intake
temperature
Fan operation
I.U
air intake
temperature
I.U: Indoor unit
86 SMGB0091 rev.2 - 11/2015
Lower than set temperature
Higher than set temperature
Higher than
+2ºC in set
temperature
Lower than set
temperature
Higher than -3ºC in
set temperature
Lower than -3ºC in
set temperature
Heating operation
Lower than
-2ºC in set
I.U
temperature
air intake
temperature
Higher than set
temperature
Fan operation
Lower than +3ºC in
I.U
set temperature
air intake
temperature
Higher than +3ºC
in set temperature