AirStage AO54FJ, Service Manual

Page: 55 / 169

5. INDOOR UNIT OPERATION
05-01
Fan speed zone
Hi zone
Med zone
Low zone
When the room
temperature decreases When the room
temperature increases
2) HEATING OPERATION
3) DRY OPERATION
An example for heat operation
Indoor heat
exchanger
temperature (T
HE
)
Indoor fan speed
mode
47
41
HI
MED
LOW
OFF
(2)
(1)
(3)
TIME -->
2min.
2min.
2min.
2min.
T
HE
1) COOLING OPERATION
• Expansion
• valve
• Indoor fan
motor
ON
OFF
OPEN
CLOSE
ON ON
ON
ON ON ON
ON
ON
30s 30s 5s
3min
5s
3min
The indoor fan always rotates at "Lo" speed.
TIME -->
•
•
2 T
R
-T
S
1 2
T
R
-T
S
1
T
R
-T
S
2
T
R
-T
S
2 3 T
R
-T
S
3
T
R
-T
S
(1) When the T
S
is changed.
(2) When the operation mode is changed from other mode to "COOL".
(3) When the fan control is changed from other position to "AUTO".
The fan speed is determined automatically in accordance
with the condition "(T
R
(corrected room temperature) - T
S
(corrected set temperature)" as shown on the right.
However, the fan speed zone is determined in the manner
as the room temperature increases for the following cases.
2min.
(1) The indoor fan starts operation 5 seconds after the electric expansion valve opens. However, when the indoor unit just starts
its operation or the operation mode is changed from other to "DRY" and the refrigerant circulation is not stopped, the fan will
rotate immediately without a delay time of 5 seconds.
(2) The indoor fan will stop in 30 seconds when the refrigerant circulation stops.
(3) The indoor fan will stop immediately when the indoor unit is stopped by pushing the stop button or by a setting of ON timer.
(4) When the refrigerant circulation is stopped due to a lower room temperature for more then 3 minutes, the fan will rotate
2 minutes at intervals of 3 minutes.
(5) When the indoor unit just starts its operation or the operation mode is changed from other to "DRY" and the refrigerant
circulation is stopped, the fan will rotate for 1 minute and then it will operate according to the statement (4).
2min
(1) When the indoor heat exchanger temperature reaches 47 or more, the fan speed switches to the next higher position.
("LOW" --> "MED", "MED" --> "HIGH").
(2) When the indoor heat exchanger temperature drops below 41 while the refrigerant circulation of the indoor unit is ON,
the fan speed switches to the next lower position ("HIGH" --> "MED", "MED" --> "LOW").
(3) After switching the fan speed, it does not switch again within 2 minutes.
(4) When "FAN CONTROL" is switched from a set fan speed to "AUTO" after the cold air prevention is released , the fan of
indoor unit will start at "MED" speed for T
HE
or at "LOW" speed for T
HE .
41 41
5-1 FAN CONTROL
5-1-2 "AUTO" Position
AUTO
HIGH MED LOW
Press the FAN CONTROL button to set the fan speed.
Fan speed setting
5-1-1 Fan Speed Setting