Auto Changeover Operation - Fujitsu AGU12RLF Service Instruction

4. AUTO CHANGEOVER OPERATION

When the air conditioner is set to the AUTO mode by remote control, operation starts in the optimum
mode from among the HEATING, COOLING, DRY and MONITORING modes. During operation, the
optimum mode is automatically switched in accordance with temperature changes. The temperature
can be set between 64°F(18°C) and 88°F(30°C) in 2°F(1°C) steps.
(Fig3 : 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.
Ts+4°F(2°C)?
NO
YES
Room temp.
Ts- 4°F(2°C)?
NO
Middle zone
YES
Outdoor temperature
77°F(25°C) ?
01-03
T
S
YES
NO
COOLING (AUTO:DRY)
OPERATION
Thermostat remains
in OFF state for 6 minutes or
longer?
System stops
or operation command other than
auto changeover operation?
Setting temperature
:
YES
NO
YES
NO