12-15
CONTROL SYSTEM
SM HAFRPM 2-A.1 GB
12.6
AUTOMATIC COOLING OR HEATING
12.6.1 Automatic Cooling or Heating - General
1. Switching-temperature between Cooling and Heating is SPT
r
3
o
c.
2. Autofan in Automatic Cooling and Heating Mode will activate “Cooling with Autofan
Mode” and“Heating with Autofan Mode” respectively.
3. When the Auto Mode is started with SPT +/-0
o
c, the unit will not select Auto Heat or
Auto Cool mode immediately. Instead, the unit will be in a temporary Fan Mode with
IFAN operating at low speed. The proper Auto Heat mode or Auto Cool will be started
whenever the RT reaches SPT-1
o
c or SPT+1
o
c respectively.
4. For RC & SH units, Mode change between Auto Heat & Auto Cool Modes are possible
only after the COMP has been OFF during the last T minutes.
Mode Change
time, T
Auto Cool to Auto Heat
3 min
Auto Heat to Auto Cool
4 min
5. When unit is changed form Cool/Dry mode to Auto Mode, the unit will continue to
operate at (Auto) Cool Mode until the conditions for switching from Auto Cool to Auto
Heat are satisfied.
Similarly, when unit is changed from Heat Mode to Auto Mode, the unit will continue to
operate at (Auto) Heat Mode until the conditions for switching from Auto Heat to Auto
Cool are satisfied.
