Carrier 42NQV009E Service Manual page 27

8-1-4. Prevent-freezing control
The indoor heat exchanger sensor detects refrigerant
vapor temperature in COOL/DRY operation. If the
temperature is below the specified value, compressor
motor speed is reduced so that operation is performed
in temperature below the specified value to prevent-
freezing of indoor heat exchanger.
8-1-5. Louver control
(1) Vertical air flow louvers
Positions of vertical air flow louvers are
automatically controlled according to the operation
status (AUTO, COOL, DRY and HEAT).
Besides, positions of vertical air flow louvers
can be arbitrarily set by pushing the [SWING] button.
OPERATION
MODE
42NQV009E
42NQV012E
Cooling
Dry
Heat
UH
rpm
1300 1250 1200
630
Air flow volume (m /h)
3
rpm
1350
Air flow volume (m /h)
3
650
(2) Swing
If the [SWING] button is pushed for 3 seconds during
running operation, vertical air flow louvers start
swinging. When the [SWING] button is pushed again,
swinging stops.
8-1.6. Indoor fan control
(1) The indoor fan is operated by the stepless speed
change motor.
(2) For air flow level, speed of the indoor fan motor is
controlled in three steps. If AUTO mode isselected,
the fan motor speed is automatically controlled by
the difference between the preset temperature and
the room temperature.
Table 8-1-2
FAN TAP
UH H M
M
H M
1140 1060 1000 880 860
610 570 540
490 460 390 380
1210 1110 1010 930
1290
590 520 460 420 390
620
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FILE NO. SVM-07018
L L- UL SL
L L- UL
L L- UL
810 750 720
310 260
350
880 780 720
810
330 290
350
SL
SL
640
660
260
240
550
660
180
260