Outdoor Fan Motor Control - Carrier 42cvur018-703 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
≥
To 28
≥
To 15
To
≥
To 5
≥
To 0.5
≥
To 0.5
≥
To 38
During
≥
To 28
ECO and
≥
To 15
QUIET
and ≥
To 5
comfort
≥
To 0.5
sleep
≥
To 0.5
To is abnormal
38CVUR018-703
Tap
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
ir Air conditioner
NO
50.3 ≤
< 22.1 < 50.3
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
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
38CVUR018-703
Tap
f 8 560
f 9 640
f A 670
f B 700
f C 800
f D 800
f E 850
f F 850
OFF status of
Alarm
OFF
OFF display
fE
fE
fB
f9
f7
f4
fB
fB
fB
f9
f7
f4
fF
– –
28
FILE NO. SVM-12052
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.