Intermittent Operation Control For Indoor Fans Of The Indoor Unit At Thermo-Off Side In Heating Operation - Toshiba ras-m16g3dv-e Service Manual

7. Intermittent Operation Control for Indoor Fans of the Indoor Unit at Thermo-off Side in
Heating Operation
While heating operation is executed in two rooms, if room temperature reached the setup temperature in one
room and thermo-off occurred, the following operations start. (Refer to the figure below.)
1. The indoor unit of the room (A room) in which thermo-off did not occur starts a continuous operation with the
setup number of revolution.
2. The indoor unit of the room (B room) in which thermo-off occurred starts intermittent operation of the indoor fan.
The indoor fan operates with number of revolution of LL. Fan-ON time is 2 minutes and Fan-OFF time is 2 to 4
minutes.
While heating operation is executed in two rooms, if room temperature reached the setup temperature in both
room had thermo-off occurred, both indoor units start intermittent operation of the indoor fan.
A room
Thermo-ON continues
B room thermo-ON
Thermo-OFF
Thermo-ON
Indoor fan: Operates with setup number of revolution
0 rpm
LL
0 rpm
Fan stop
T on
T off
B room thermo-OFF
LL LL
Fan stop
T on T on
T off
– 30 –
B room thermo-ON
Operated with setup number
of revolution
Operated with UL or SUL
Fan stop
T off
T on=2 min.
T off time
To < 5°C
5 ≤ To < 10
10 ≤ To
2 min.
3 min.
4 min.