Carrier 42UQV050M - Indoor Fan Motor Control (Cooling)

– 28 –
Item
2. Indoor fan
motor control
Operation flow and applicable data, etc.
<In cooling operation>
(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)
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.
(Fig. 1)
(Fig. 2)
(Table 1) Indoor fan air flow rate
+2.5
Ta
[
C
]
+2.0
+1.5
+1.0
+0.5
Tsc
a
b
c
d
e
M+(WB)
*3
*4
*5
L(W6)
Air volume AUTO
L
L+
M
M+
H
W6
(L + M) / 2
W9
(M + H) / 2
WC
Indication
Fan speed
Fan speed setup
COOL ON
AUTO
MANUAL
*3 : Fan speed = [(M+)–L] x 3/4 + L
*4 : Fan speed = [(M+)–L] x 2/4 + L
*5 : Fan speed = [(M+)–L] x 1/4 + L
(Linear approximation
from M+ and L)
42UQV050M
42UQV060M
Fan speed Air flow rate Fan speed Air flow rate
(rpm) (m3/h) (rpm) (m3/h)
WF UH 1100 991 1200 1101
WE H 1100 991 1200 1101
WD M+ 1090 980 1200 1101
WC H 1070 957 1180 1079
WB M+ 980 858 1080 968
WA 940 813
W9 M L+ 890 758 980 858
W8 L 780 636 850 713
W7 L+ L- L+ 750 603 810 669
W6 L L 740 591 800 658
W5 L- UL L- 700 547 760 614
W4 UL UL 700 547 700 547
W3 SUL SUL 650 492 650 492
W2 SUL 500 325 500 325
W1 500 325 500
325
M
COOL
HEAT
DRY
Fan speed
level
1020 902
FILE NO. SVM-13035