Indoor Fan Motor Control - Carrier 42UQV050M Service Manual

Item
2. Indoor fan <In cooling operation>
motor control
(This operation controls the fan speed at indoor unit side.)
The indoor fan (cross flow fan) is operated by the phase-
control induction motor. The fan rotates in 5 stages in
MANUAL mode, and in 5 stages in AUTO mode, respec-
tively. (Table 1)
COOL ON
Fan speed setup
AUTO
Ta
[ C ]
+2.5
a
+2.0
b
+1.5
c
+1.0
d
+0.5
e
Tsc
(Table 1) Indoor fan air flow rate
Fan speed
COOL HEAT DRY
level
WF UH
WE H
WD M+
WC H
WB M+ M
WA
W9 M L+
W8 L
W7 L+ L- L+
W6 L L
W5 L- UL L-
W4 UL UL
W3 SUL SUL
W2 SUL
W1
Operation flow and applicable data, etc.
MANUAL
Indication
L
L+
M
M+
H
Air volume AUTO
M+(WB)
*3 *3 : Fan speed = [(M+)–L] x 3/4 + L
*4 *4 : Fan speed = [(M+)–L] x 2/4 + L
*5 *5 : Fan speed = [(M+)–L] x 1/4 + L
(Linear approximation
L(W6)
from M+ and L)
42UQV050M
Fan speed Air flow r ate Fan speed
(rpm) (m3/h )
1100 991
1100 991
1090 980
1070 957
980 858
940 813
890 758
780 636
750 603
740 591
700 547
700 547
650 492
500 325
500 325
(Fig. 1)
Fan speed
W6
(L + M) / 2
W9
(M + H) / 2
WC
(Fig. 2)
42UQV060M
Air flow rate
(rpm) (m3/h)
1200 1101
1200 1101
1200 1101
1180 1079
1080 968
1020 902
980 858
850 713
810 669
800 658
760 614
700 547
650 492
500 325
325
500
– 28 –
FILE NO. SVM-13035
Description
* Symbols
UH : Ultra High
H : High
M+ : Medium+
M : Medium
L+ : Low+
L : Low
L- : Low–
UL : Ultra Low
SUL : Super Ultra Low
* The fan speed broadly varies due
to position of the louver, etc.
The described value indicates one
under condition of inclining
downward blowing.
1) When setting the fan speed to L,
L+, M, M+ or H on the remote
controller, the operation is
performed with the constant
speed shown in Fig. 1.
2) When setting the fan speed to
AUTO on the remote controller,
revolution of the fan motor is
controlled to the fan speed level
shown in Fig. 2 and Table 1
according to the setup tempera-
ture, room temperature, and heat
exchanger temperature.