Compressor Control - Fujitsu ASU18RMLQ Service Instruction

6. COMPRESSOR CONTROL

(1). OPERATION FREQUENCY RANGE
The operation frequency of the compressor is different based on the operation mode as
shown in the table 4.
(Table 4 : Compressor Operation Frequency Range)
AOU24RML
AOU36RML
(2). OPERATION FREQUENCY CONTROL AT START UP
The compressor frequency soon after the start-up is controlled as shown in the figure 6.
(Fig.6 : Compressor Control at Start-up)
56rps
40rps
46 134
1) Compressor operates for 180 seconds by 40 rotations.
2) In the case of lower than 40 rotations, it operates at these rotations.
3) Compressor operates for 60 to 720 seconds.
When discharge temperature exceeds 30 degrees in the meantime, it shifts to 56 rotations.
4) Compressor operates at target rotations after 120 second operation.
Cooling
Min Max
15Hz 90Hz
15Hz 90Hz
60~720 120
01-10
Heating
Min Max
20Hz 95Hz
20Hz 95Hz
(Sec)