Carrier 38VMA Series, Service Manual, Page: 26 / 112

c. Compressor Control
Compressor Operating Priority
Each compressor operates in the following order of priority.
38VMA072, 096, 120HDS 38VMA144HDS
INV: Inverter compressor
Table 10 - Cooling Compressor Control (38VMA072, 096, 120HDS)
Capacity QCr
Frequency
Capacity QCr
Frequency
38VMA072 38VMA096 38VMA120 38VMA072 38VMA096 38VMA120
1 20Hz 20Hz 20Hz 21 56Hz 56Hz 56Hz
2 20Hz 20Hz 20Hz 22 58Hz 58Hz 58Hz
3 20Hz 20Hz 20Hz 23 60Hz 60Hz 60Hz
4 20Hz 20Hz 20Hz 24 62Hz 62Hz 62Hz
5 20Hz 20Hz 20Hz 25 64Hz 64Hz 64Hz
6 20Hz 20Hz 20Hz 26 68Hz 68Hz 68Hz
7 20Hz 20Hz 20Hz 27 70Hz 70Hz 70Hz
8 22Hz 22Hz 22Hz 28 72Hz 72Hz
9 24Hz 24Hz 24Hz 29 74Hz 74Hz
10 26Hz 26Hz 26Hz 30 76Hz 76Hz
11 28Hz 28Hz 28Hz 31 78Hz 78Hz
12 32Hz 32Hz 32Hz 32 80Hz 80Hz
13 36Hz 36Hz 36Hz 33 82Hz 82Hz
14 39Hz 39Hz 39Hz 34 84Hz
15 42Hz 42Hz 42Hz 35 84Hz
16 44Hz 44Hz 44Hz 36 86Hz
17 46Hz 46Hz 46Hz 37 86Hz
18 48Hz 48Hz 48Hz 38 86Hz
19 52Hz 52Hz 52Hz 39 86Hz
20 54Hz 54Hz 54Hz
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