Auto Changeover Heating / Cooling Operation; Function Available Indoor Unit; Auto Changeover Operation - Fujitsu Airstage VR-II Series Service Manual

3-2-2 Auto Changeover Heating / Cooling Operation

[Function available Indoor unit(s)]
Connectable type : All Indoor units
Connectable type : Administrative indoor unit (Management Indoor unit) Refer to the setting Method
Setting Method
1. Switch operation mode management to "Management by indoor unit" by RB unit DIP-SW.
2. Set the master indoor unit by wired remote controller.
3. Judge cooling/heating by the difference between the master indoor unit's setting temperature and
the room temperature.

AUTO CHANGEOVER operation

Operation flow chart
START
Room temp.
Ts+ 4°F(2°C) ?
NO
Room temp.
Ts -4°F(-2°C)?
HEATING OPERATION
Thermostat remains
YES
in OFF state for 6 minutes or
longer?
System stops
YES
or operation command other than
auto changeover operation?
YES
T Setting temperature
NO
:
S
YES
NO
NO
COOLING OPERATION
Thermostat remains
in OFF state for 6 minutes or
longer?
NO
System stops
or operation command other than
auto changeover operation?
NO
03-04
YES
YES