Carrier 38MBRC Series Service Manual page 11

38MBRC: Service Manual
COOLING Mode
Outdoor Fan Running Rules
A A
28 (82.4°F)
26 (78.8°F)
B B
25 (77°F)
23 (73.4°F)
C C
22 (71.6°F)
20 (69°F)
D D
19 (66.2°F)
17 (62.6°F)
E E
Fig. 11 — Outdoor Fan Running Rules
In the COOLING mode, the indoor fan runs all the time and the speed
can be selected as high, medium, low and auto. The indoor fan is
controlled as shown in Fig. 12.
Setting
T1-Td °F (°C)
Fan Speed
4.5(40.1)
A
3.0(37.4)
H
B
1.5(34.7)
C
4.5(40.1)
D
M
3.0(37.4)
E
1.5(34.7)
F
4.5(40.1)
G
L 3.0(37.4)
H
1.5(34.7)
I
Fig. 12 — Indoor Fan Table
The AUTO Fan function under the COOLING mode acts (see Fig. 13).
T1-Td
6.0°C(13°F)
a
5.0°C(11.0°F)
4.0°C(8°F)
2.5°C(5°F)
1.0°C(2°F)
Fig. 13 —AUTO Fan function under the COOLING Mode
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
DC_FAN_HI_SPD_ADD ADD D DD D D D D D D D D D D
DC_FAN_MID_SPD_ADD _A A A A D D D D D D D D D D D
DC_FAN_MIN_SPD_ADD _ADD DD DD D D D D D D D D
DC_FAN_SLOW_SPD_ADD PD_A A A A D D D D D D D D D D D D
DC_FAN_SSLOW_SPD_ADD SPD_A A A A A A A A A DD DD DD DD DD DD DD DD DD DD DD
Actual
Fan Speed
H+(H+=H+G)
H（=H）
H-（H-=H-G)
M+(M+=M+Z)
M(M=M)
M-(M-=M-Z)
L+(L+=L+D)
L(L=L)
L-(L-=L-D)
H
(H-L)*0.75+L
(H-L)*0.5+L
b
(H-L)*0.25+L
c
L
d
e
HEATING Mode
Outdoor Fan Running Rules
T4
69.8°F(21°C)
66.2°F(19°C)
64.4°F(18°C)
60.8°F(16°C)
59°F(15°C)
55.4°F(13°C)
53.6°F(12°C)
50°F(10°C)
Fig. 14 — Outdoor Fan Running Rules
Indoor Fan Running Rules
When the compressor is on, the indoor fan can be set to high/med/low/
auto. And the anti-cold wind function has the priority. The indoor fan is
controlled as shown in Fig. 15.
Setting Fan
T1-Td+34.7°F(1.5°C)
Speed
-3°F(-1.5°C)
H
-6°F(-3.0°C)
-10°F(-4.5°C)
-3°F(-1.5°C)
M
-6°F(-3.0°C)
-10°F(-4.5°C)
-3°F(-1.5°C)
L -6°F(-3.0°C)
-10°F(-4.5°C)
Fig. 15 — Indoor Fan Running Rules
AUTO Fan action in HEATING mode
T1-Td+3°F(1.5°C)
0°F(0.0°C)
-2°F(-1°C)
-4°F(-2°C)
-6°F(-3°C)
-8°F(-4°C)
-11.0°F(-5°C)
-13°F(-6°C)
-15°F(-6.5°C)
Fig. 16 — AUTO Fan action in HEATING mode
11
E DC_FAN_SSLOW_SPD_ADD
D DC_FAN_SLOW_SPD_ADD
C DC_FAN_MIN_SPD_ADD
B DC_FAN_MID_SPD_ADD
A DC_FAN_HI_SPD_ADD
Actual Fan
Speed
H-（H-=H-G)
H（=H）
H+(H+=H+G)
M-(M-=M-Z)
M(M=M)
M+(M+=M+Z)
L-(L-=L-D)
L(L=L)
L+(L+=L+D)
L
(H+-L)*0.2+L
(H+-L)*0.4+L
(H+-L)*0.6+L
(H+-L)*0.8+L
H+