Toshiba RAS-13NKV-E Service Manual page 30

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. P.M.V. (Pulse Modulating Valve)
Using P.M.V., refrigerant flow of refrigeration cycle is
varied for the optimum temperature.
After the power has been turned on, when a serial
operation signal is received from indoor at the first
time, or when PMV alarm is detected and the equip-
ment is reactivated, move the valve once until it hits on
the stopper for positioning of the valve. In this case,
ticktack sound may be heard.
8-1-6. Louver control
(1) Vertical air flow louvers
Positions of vertical air flow louvers are
automatically controlled according to the operation
status (AUTO (A), COOL ( ), DRY ( ), HEAT( )
and FAN ONLY ( ). Besides, positions of vertical
air flow louvers can be arbitrarily set by pushing the
[FIX] button.
Operation
mode
Cooling and
Fan only
Dry
Heating
Table 8-1-2
Fan
mode Remote Speed
Control (rpm)
H HIGH 1210
M+ 1130
MED+ 1110
M MED 1010
LOW+ 910
L+ 880
L LOW 810
L- 780
L+ 880
L 810
L- 780
UL 720
SUL 660
H HIGH 1290
M+ 1290
MED+ 1200
M MED 1110
LOW+ 1020
L+ 1010
L LOW 930
L- 880
UL 780
SUL 550
- 29 -
(2) Swing
If the [SWING] button is pressed during running
operation, vertical air flow louvers start swinging.
When the [SWING] button is pushed, swinging stops.
8-1.7. 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 five steps (LOW, LOW
and HIGH). If AUTO mode is selected, the fan
motor speed is automatically controlled by the
difference between the preset temperature and
the room temperature.
LOW
MED
13NKV
Air flow Speed
3
(m /h)
(rpm)
590 1560
530 1430
520 1440
460 1330
410 1230
390 1230
350 1130
330 1030
390 1230
350 1130
330 1030
290 920
260 860
620 1600
620 1560
570 1510
520 1430
470 1330
460 1330
420 1230
390 1230
330 1030
180 750
FILE NO. SVM-05027
+ , MED, MED
LOW+MED
+
=
2
MED+HIGH
+ =
2
16NKV
Air flow
3
(m /h)
760
700
710
640
600
600
530
470
600
530
470
410
380
780
760
740
700
640
640
600
600
470
310
+