Fan Control; Auto" Position; Low" "Med" And "High" Position - Fujitsu AB12 Service Manual

6.2 FAN CONTROL

6-2-1 "AUTO" POSITION

1) COOLING OPERATION
Air flow mode is set automatically in accordance with the
condition "(Room temp. - Set temp.)" as shown at the right.
2) HEATING OPERATION
(1) When the indoor heat exchanger temperature reaches 47 C or more, the fan mode switches to the next higher posi-
tion ("LOW" → "MED", "MED" → "HIGH").
(2) When the indoor heat exchanger temperature drops below 41 C while the compressor operates, the fan mode switch-
es to the next lower position ("HIGH" → "MED", "MED" → "LOW").
(3) After switching the fan mode, it does not switch again within 2 minutes.
(4) When "FAN CONTROL" is switched to "AUTO" while the unit is operated at the "FAN CONTROL" position of "HIGH",
"MED" or "LOW", the unit operation is performed in the "MED" fan mode.
An example for heat operation
• Indoor heat
exchanger
temperature (T C)
R
• Indoor fan speed
mode
3) DRY OPERATION
"Indoor fan motor" operates with "Lo" fan speed despite of "FAN CONTROL" mode.
OPEN
• Expansion
CLOSE
• valve
ON
• Indoor fan
OFF
motor
(1) The indoor fan motor starts operation after 5 seconds when the air condition starts operation or the refrigerant circulation
is activating when the operation mode is changed from other OPERATION MODE to "DRY".
(2) The indoor fan motor stops after 30 seconds from the refrigerant circulation stops.
(3) During the indoor unit operation, the indoor fan motor will be operated for 120 seconds when the refrigerant circulation
continuously stops over 3 minutes.
4) FAN OPERATION
The fan operates continuously with Lo mode.
6-2-2 "LOW", "MED" AND "HIGH" POSITION
The indoor fan operates at the air flow set in the FAN CONTROL
mode.
47 C
(2)
41 C
HI
MED
LOW
OFF
ON ON
ON
ON
30s
30s
5s
Fan speed zone
2 C or more
Less than 2 C
1 C or more
Less than 1 C
When the room
temperature lowers
T
(1)
n
(3)
2min
2min
2min
ON
ON
120s 3min
3min
– 64 –
3 C or more
Hi zone
Less than 3 C
2 C or more
Med zone
Less than 2 C
Low zone
When the room
temperature rises
TIME →
C
2min
ON
ON
TIME →
5s
NON STOP CLOCK
C
TIMER SET TIME TEMP./DAY FAN
MODE CONTROL
CONTROL
CLOCK ADJUST
ZONE ENERGY SAVE START/STOP
SET DAY OFF
AUTO
MASTER