Heating Operation - Fujitsu AUXB04GALH Service Manual

2-3-2 Heating Operation

Fan step
AJ*072LELAH AJ*090LELAH AJ*108LELAH
13
12
680
11
680
660
10
660
590
9
510
520
8
400
440
7
330
380
6
300
300
5
300
450
4
300
3
Intermittent 1
2
Intermittent 2
1
0
Switching conditions of step
The initial speed of the first boot outdoor unit is detected by outdoor air temperature sensor value (TAOUT).
Outside air temperature
sensor detected value
TAOUT 0°C
0°C TAOUT 5°C
5°C TAOUT
Thereafter, the high-pressure is monitoring at a set time interval and the fan speed is changed by the following conditions.
(Condition which lowers the fan speed)
Low-pressure 0.85MPa and heat sink temperature
(Condition which raises the fan speed)
Low-pressure saturation
Fan speed (rpm)
-
-
-
-
-
-
-
-
780
740
660
660
590
510
520
400
440
330
380
300
300
300
450
0 0
300
0 0
Intermittent 1 Intermittent 1
0 0
Intermittent 2 Intermittent 2
0
0
0
0
0 0
Fan step
8HP&10HP: 11 / 12HP: 13
6
0
0.74MPa or heat sink temperature
960
Upper FAN
Step
880
Lower FAN
870
790
790
710
Intermittent 1 : 14 sec. ON (300rpm), 17 sec. OFF
700
620 Intermittent 2 : 19 sec. ON (300rpm), 17 sec. OFF
590
510
520
400
440
330
380
300
300
300
450
0
300
0
0
0
0
0
55° C: 8&10HP
60° C: 12HP
60° C: 8&10HP
65° C: 12HP
02-05