Outdoor Fan Motor Control - Carrier 42UQV050M Service Manual

Item
The blowing air volume at the outdoor unit side is controlled.
3. Outdoor fan
motor control Receiving the operation command from the controller of
indoor unit, the controller of outdoor unit controls fan speed.
* For the fan motor, a DC motor with non-stage variable
speed system is used. However, it is limited to 8 stages for
reasons of controlling.
Air conditioner ON
(Remote controller)
Indoor unit controller
1) Outdoor unit
operation command
(Outdoor fan control)
2) Fan speed ≥ 400
when the motor stopped.
Fan motor ON
3) Fan lock
4) Motor operates as shown in the table below.
In cooling operation
Compressor speed
(rps) MIN MAX MIN MAX MIN MAX
To≥38°C f6
≥
f5
To 28°C
≥
f3
To 15°C
To
≥
To 5.5°C
≥
To 0°C
≥
To -5°C
≥
To 38°C
During
≥
To 28°C
ECO and
≥
To 15°C
QUIET
and ≥
To 5.5°C
comfort
≥
To 0°C
sleep
≥
To -5°C
To is abnormal
Outdoor fan speed (rpm)
Tap
38UYV050M
f 0 0
f 1
230
f 2
300
f 3
350
f 4 410
f 5 480
f 6
500
f 7
530
Operation flow and applicable data, etc.
YES
fan motor continues.
NO
YES
Air conditioner
ir
NO
50.3 ≤
< 22.1 < 50.3
f9 f8 fB fA
f9 f7 fB f9
f7 f5 f9 f7
f1 f3 f1 f7 f3
f1 f3 f1 f5 f3
f0 f1 f0 f3 f1
f6 f9 f8 fB fA
f5 f9 f7 fB f9
f3 f7 f5 f9 f7
f1 f3 f1 f7 f3
f1 f3 f1 f5 f3
f0 f1 f0 f3 f1
f1 fF f1 fF f1
Tap
38UYV060M 38UYV050M
0 f 8 560
230 f 9 640
300 f A 670
350 f B 700
410 f C 800
480 f D 800
500 f E
900
530 f F
900
OFF status of
Alarm
OFF
OFF display
Compressor speed (rps)
≥
To
fE
≥
To
To
fE
≥
To -5°C
fB
To < -5°C
f9 ≥
To
f7 ≥
To
During
f4 ≥
ECO mode
To
fB
To < -5°C
fB
When To is abnormal
fB
f9
f7
f4
fF
38UYV060M
560
640
670
750
920
920
1000
1000
– 30 –
FILE NO. SVM-13035
Description
1) The operation command sent
from the remote controller is
processed by the indoor unit
controller and transferred to the
controller of the outdoor unit.
2) When strong wind blows at
outdoor side, the operation of air
conditioner continues with the
fan motor stopped.
3) Whether the fan is locked or not
is detected, and the operation of
air conditioner stops and an
alarm is displayed if the fan is
locked.
4) According to each operation
mode, by the conditions of
outdoor temperature (To) and
compressor revolution, the speed
of the outdoor fan shown in the
table is selected.
In Heating operation
< 30.5 < 55.1
10°C f6 f8
f8 fA
5.5°C
fA fB
fA fB
10°C f5 f7
5.5°C f7 f9
f9 fA
-5°C
f9 fA
fD fD
55.1 ≤
f9
fC
fD
fD
f9
fB
fB
fB
fD