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26
OUTDOOR FAN CONTROL
There are eight step levels (W1 to W8); however, OFF = 0 rpm is not displayed as a step level.
Table 26 —Eight Steps of Outdoor Fan Control
Fan Control in Cooling Mode
Table 27 —Fan Control by Outdoor Temperature (T4) and Compressor Frequency
SEQUENCE:
1. Outdoor fan will come on (W7) for 20 seconds before compressor starts.
2. Outdoor fan continues to run (W7) for another 20 seconds after compressor starts.
3. Based on outdoor temperature (T4), outdoor fan will follow step level for another 40 seconds as shown in table above.
4. 60 seconds after the compressor starts, outdoor fan step level is determined based on T4, T5, and Tc.
A210260A210266
Fig. 32 —Fan Control by Condensing Temperature (Tc)
Method B shows the T4 < 23°F operation as mentioned in the above table.
A210267
Fig. 33 —Fan Control Correction by Compressor Discharge Temperature (T5)
FAN
OFF
W1
W2
W3
W4
W5
W6
W7
RPM
Up
0
300
330
400
460
520
630
780
Down
0
0
300
380
440
500
610
760
38VMB036~060HDS3-1
Frequency < 34
34 ≤ Frequency < 48
Frequency ≥ 50
Minimum
Maximum
Minimum
Maximum
Minimum
Maximum
T4 ≥ 84.2°F
W2
W7
W4
W7
W6
W7
62.6°F ≤ T4 < 84.2°F
W1
W4
W2
W6
W4
W6
41°F ≤ T4 < 62.6°F
OFF
W2
W1
W4
W3
W6
32°F ≤ T4 < 41°F
OFF
W1
W1
W2
W1
W4
23°F ≤ T4 < 32°F
OFF
W1
W1
W2
W1
W2
T4 < 23°F
OFF
OFF
OFF
OFF
OFF
OFF
L*: Outdoor fan runs at maximum speed according to fan control by T4 and frequency
table. Under the condition that the maximum speed is OFF, use W1 instead.