Compressor Control - Fujitsu ASU09RL2 Service Instructions Manual

8. COMPRESSOR CONTROL

1. OPEARTION FREQUENCY RANGE
The operation frequency of the compressor is different based on the operation mode as
shown in the Table 11.
(Table 11 : Compressor frequency range)
AOU09RL2
AOU12RL2
2. OPEARTION FREQUENCY CONTROL AT NORMAL START UP
The compressor frequency soon after the start-up is controlled as shown in the Fig.9.
(Fig.9 : Compressor control at start-up)
Frequency
Frequency
Frequency
Frequency
Frequency
Frequency
(Frequency)
AOU09RL2
AOU12RL2
(Time)
AOU09RL2
AOU12RL2
3. LIMITATION OF COMPRESSOR FREQUENCY BY OUTDOOR TEMPERATURE
The minimum compressor frequency is limited by outdoor temperature as shown in the Table12.
(Table12 : Limitation of Compressor Frequency)
[ Cooling/ Dry ]
AOU09RL2
AOU12RL2
[ Heating ]
AOU09RL2
AOU12RL2
Cooling / Dry
Minimum Maximum
80rps
18rps
96rps
Time Time
Frequency
Frequency
56rps 67rps
56rps 74rps
Time Time
80sec 140sec
60sec 100sec
(50°F) (59°F)
10°C 14°C
Under Over Under
35rps 23rps
45rps 27rps
(26°F) (45°F)
- 3°C 7°C
Under Over Under
34rps 22rps
36rps 27rps
Heating
Minimum Maximum
18rps 120rps
Time Time Time
Frequency Frequency Frequency
75rps 78rps
87rps 97rps
Time Time
200sec 380sec
140sec 200sec
(104°F)
40°C
Over Under Over
------- 30rps
(59°F)
14°C
Over Under Over
27rps
-------
27rps
01-08
Time
6
Frequency
78rps 78rps
108rps 119rps
Time Time
6
440sec 440sec
350sec 410sec
(104°F)
40°C
Under Over
30rps