Fujitsu ARYG72LHTA Service Instruction page 10

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
Monitor mode
Room temp.
Ts+2 °C ?
NO
Room temp.
Ts -2 °C ?
NO
Middle zone
Auto change over is
second or more?
NO
Operation mode of
outdoor unit : Cooling?
NO
YES
Operation mode of outdoor unit
: Heating?
NO
YES
Outdoor temperature<
25 °C?
NO
01-06
T
S
YES
YES
Operation mode
before the monitor mode is
cooling mode?
NO
YES
COOLING OPERATION
Thermostat remains
in OFF state for 6 minutes or
longer?
System stops
or operation command other than
auto changeover operation?
Setting temperature
:
YES
YES
NO
YES
NO