Automatic Cooling And Heating Operation - Hitachi RAS-(3-6)HVNC1(E) Service Manual

5 Control System
5.4.4 Automatic cooling and heating operation
Auto cool/heat
operation
IU
air
intake temp.
Cooling
operation
IU
air
intake temp.
Fan
operation
IU
air
intake temp.
IU: Indoor unit
151
SMGB0087 rev.0 - 12/2013
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
IU
air
intake temp.
Lower than -2ºC in
set temperature
Higher than set
temperature
Fan
operation
Lower than +3ºC in
IU set temperature
air
intake temp.
Higher than +3ºC
in set temperature
5