Carrier 38VMA Series, Service Manual, Page: 29 / 112

Table 15 - EXV A, EXV B (38VMA144HDS)
Capacity 1—15 16—30 31—48
Initial pulse step 120P 250P 380P
Normal control
Table 16 - EXV C
Electronic Expansion Valve EXV C
Normal control 0P
NOTE:
Completely open position of electronic expansion valve (EXV) is 480P.
When the compressor ramps up, EXV will be at initial pulse step for 4 minutes, and then the EXV will be adjusted according to
the maximum discharge temperature.
The system will check the maximum discharge temperature every 2 minutes.
4. Fan Control
Table 17 - Fan Steps
Fan Steps
Rotating Speed
38VMA072, 096HDS 38VMA120HDS 38VMA144HDS
0 0 / 0 0 / 0 0 / 0
1 250 / 0 250 / 0 250 / 0
2 330 / 0 330 / 0 330 / 0
3 250 / 250 250 / 250 250 / 250
4 330 / 330 330 / 330 330 / 330
5 410 / 410 410 / 410 410 / 410
6 460 / 460 460 / 460 460 / 460
7 530 / 530 530 / 530 530 / 530
8 580 / 580 580 / 580 580 / 580
9 660 / 660 660 / 660 660 / 660
10 710 / 710 710 / 710 710 / 710
11 760 / 760 800 / 800 800 / 800
12 (standard 0pa) 800 / 800 850 / 850 980 / 890
13 (20pa) 870 / 870 870 / 870 980 / 890
14 (40pa) 980 / 890 980 / 890 980 / 890
15 (60pa) 1010 / 930 1010 / 930 1010 / 930
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