Compressor Control - Fujitsu ABU18RULX Service Instruction

8. COMPRESSOR CONTROL

1. OPERATION FREQUENCY RANGE
The operation frequency of the compressor is different based on the operation mode as
shown in Table 7.
(Table 7 : Compressor Operation Frequency Range)
ABU18RULX
ABU24RULX
ABU36RSLX
2. OPERATION FREQUENCY CONTROL AT START UP
The compressor frequency soon after the start-up is controlled as shown in Figure 10.
(Fig.10 : Compressor Control at Start-up)
Frequency
Frequency
(Frequency)
ABU18RULX
ABU24RULX
ABU36RSLX
(Time)
ABU18RULX
ABU24RULX
ABU36RSLX
Cooling
Min Max
20Hz 63Hz
20Hz 80Hz
20Hz 90Hz
1
Hold
2
Time A Time B Time C
Time E
1 Discharge pipe temp. > 50°F (10°C) (Cooling)
2 Discharge pipe temp. < 50°F (10°C) (Cooling)
Frequency
Frequency
40Hz 56Hz
Time A Time B
180sec 60sec
Heating
Min Max
20Hz 87Hz
20Hz 87Hz
20Hz 95Hz
=
86°F (30°C) (Heating)
86°F (30°C) (Heating)
Time C Time D
120sec 120sec
01-10
Dry
25Hz
30Hz
45Hz
Time D
Time E
720sec