Electronic Expansion Valve Control; Outdoor Fan Control; Outdoor Fan Speed Steps - Midea V6-i Series Service Manual

5.5 Electronic Expansion Valve Control

EXVA control
The position of electronic expansion valves EXVA is controlled in steps from 0 (fully closed) to 480 (fully open) or 3000
(fully open).
In cooling mode:
 When the outdoor unit is in standby:
 EXVA is at position 352 (steps) or 2112 (steps).
 When the outdoor unit is running:
 EXVA is controlled according to discharge temperature.
In heating mode:
 When the outdoor unit is in standby:
 EXVA is at position 352 (steps) or 2112 (steps).
 When the outdoor unit is running:
 EXVA is controlled according to discharge superheat.
EXVC control
The positions of electronic expansion valves EXVC are controlled in steps from 0 (fully closed) to 480 (fully open).
In cooling / heating mode:
 When the outdoor unit is in standby:
 EXVC is fully closed.
 When the outdoor unit is running:
 EXVC is controlled according to temperature different between plate heat exchanger inlet and outlet.

5.6 Outdoor Fan Control

The speed of the outdoor unit fans is adjusted in steps, as shown in Table 3-5.3.
Table 3-5.3: Outdoor fan speed steps
Fan speed index
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Fan speed (rpm)
8-18HP
FANA / FANB
0
120
150
170
190
210 310 / 0 (150 / 150)
230 350 / 0 (180 / 180)
250 380 / 0 (210 / 210)
270 410 / 0 (240 / 240)
290 280 / 280
310 320 / 320
330 360 / 360
350 400 / 400
370 440 / 440
390 480 / 480
410 520 / 520
430 560 / 560
450 600 / 600
470 640 / 640
490 680 / 680
510 720 / 720
530 760 / 760
560 800 / 800
20-22HP
0 / 0
150 / 0
190 / 0
230 / 0
270 / 0
V6-i VRF 50/60Hz
24-32HP
FANA / FANB
0 / 0
120 / 0
150 / 0
170 / 0
190 / 0
210 / 0
230 / 0
250 / 0 (120 / 120)
270 / 0 ( 150 / 150)
330 / 0 (170 / 170)
370 / 0 (190 / 190)
210 / 210
230 / 230
250 / 250
270 / 270
290 / 290
310 / 310
330 / 330
350 / 350
370 / 370
400 / 400
430 / 430
470 / 470
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