Auto Changeover Operation - Fujitsu ASU30RLE Service Instruction

1-4. AUTO CHANGEOVER OPERATION

When the air conditioner is set to the Auto mode by remote controller, operation starts in the optimum
mode from among the Heating, Cooling, Dry and Monitoring mode.
During operation, the optimum mode is automatically switched in accordance with temperature changes.
The temperature can be set between 64°F (18°C) and 86°F (30°C) in 2°F (1°C) steps.
AUTO CHANGEOVER operation flow chart
HEATING OPERATION
YES
Thermostat remains
in OFF state for 6 minutes or
longer?
NO
YES
System stops
or operation command other than
auto changeover operation?
NO
START
Room temp.
°F( °C)
Ts + 4 2
NO
YES
Room temp.
Ts - 4 °F( 2 °C)
NO
Middle zone
Operation mode
of outdoor unit : Cooling or Dry?
NO
YES
Operation mode
of outdoor unit : Heating?
NO
YES
Outdoor temperature
77°F(25°C)?
NO
01-03
YES
?
?
YES
COOLING (AUTO:DRY)
OPERATION
Thermostat remains
in OFF state for 6 minutes or
or operation command other than
auto changeover operation?
T Setting temperature
:
S
YES
longer?
NO
YES
System stops
NO