Fujitsu ABYG18KRTA, Service Manual

Page: 157 / 196

3. Fan control
Tr: Room temperature
Ts: Setting temperature
3-1. Indoor fan control
¢
Fan speed
Indoor fan speed is defined as below.
Operation
mode
Fan mode
Speed (rpm)
18 22 24 30 36 45
Heating
HIGH 950 1,020 970 1,090 1,090 1,120
MED+ 900 940 890 1,000 1,020 1,030
MED 880 880 810 900 920 940
LOW- 800 800 720 800 830 870
QUIET 750 750 620 680 700 740
Cool air
prevention
500 500 500 500 500 500
S-LOW 300 300 300 300 300 300
Cooling/Fan
HIGH 950 1,020 970 1,090 1,120 1,140
MED 880 880 810 900 920 940
LOW 800 800 720 800 830 870
QUIET 750 750 620 680 700 740
Soft quiet
500*
1
500*
1
500*
1
500*
1
500*
1
500*
1
S-LOW
300*
2
300*
2
300*
2
300*
2
300*
2
300*
2
Dry
X zone: 750
J zone: 750
X zone: 750
J zone: 750
X zone: 620
J zone: 620
X zone: 680
J zone: 680
X zone: 700
J zone: 700
X zone: 740
J zone: 740
*1: Fan mode only
*2: Cooling mode only
¢
Fan operation
Airflow can be switched in 5 steps such as AUTO, QUIET, LOW, MED, HIGH while indoor unit fan
only runs.
When fan mode is set at AUTO, it operates on MED fan speed.
¢
Cooling operation
Switch the airflow AUTO, and indoor fan motor will run according to room temperature, as below.
On the other hand, if switched in HIGH—QUIET, indoor motor will run at a constant airflow of COOL
operation modes QUIET, LOW, MED, HIGH as shown in “Fan speed” above.
Airflow change over (Cooling: Auto)
When room
temperature rises
When room
temperature drops
Tr - Ts ≥ 2 °C
HIGH mode
MED mode
LOW mode
2 °C > Tr - Ts ≥ 1 °C
1 °C > Tr - Ts
Tr - Ts ≥ 2.5 °C
2.5 °C > Tr - Ts ≥ 1.5 °C
1.5 °C > Tr - Ts
3-1. Indoor fan control
- (04-15) -
3. Fan control
CONTROL AND FUNCTIONS CONTROL AND FUNCTIONS