FILE NO. SVM-05027
– 29 –
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
(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
+
, MED, MED
+
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
+
=
LOW+MED
2
MED+HIGH
2
air flow louvers can be arbitrarily set by pushing the
[FIX] button.
Table 8-1-2
Operation
Fan
mode
mode
Remote
Speed
Air flow
Speed
Air flow
Control
(rpm)
(m
3
/h)
(rpm)
(m
3
/h)
H
HIGH
1210
590
1560
760
M+
1130
530
1430
700
MED+
1110
520
1440
710
Cooling and
M
MED
1010
460
1330
640
Fan only
LOW+
910
410
1230
600
L+
880
390
1230
600
L
LOW
810
350
1130
530
L-
780
330
1030
470
L+
880
390
1230
600
L
810
350
1130
530
Dry
L-
780
330
1030
470
UL
720
290
920
410
SUL
660
260
860
380
H
HIGH
1290
620
1600
780
M+
1290
620
1560
760
MED+
1200
570
1510
740
M
MED
1110
520
1430
700
Heating
LOW+
1020
470
1330
640
L+
1010
460
1330
640
L
LOW
930
420
1230
600
L-
880
390
1230
600
UL
780
330
1030
470
SUL
550
180
750
310
13NKV 16NKV
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