FILE NO. SVM-02007
– 25 –
8-2. Description of Operation Circuit
(1) When turning on the breaker, the operation lamp
blinks. This means that the power is on (or the
power supply is cut off.)
(2) When pressing [START/STOP] button on the
remote control, receiving beep sounds from the
indoor unit, and the next operation is performed
together with opening the vertical air flow louver.
(3) Once the operation mode is set, it is memorized in
the microcomputer so that the previous operation
can effected thereafter simply by pressing
[START/STOP] button.
8-2-1. Fan only operation
([MODE] button on the remote control is set to the
Fan only ( ) operation.)
(1) When [FAN] button is set to AUTO, the indoor fan
motor operates as shown in Fig. 8-2-1. When
[FAN] button is set to LOW, LOW
+
, MED, MED
+
or
HIGH, the motor operates with a constant air flow.
NOTE :
*1: The values marked with *1 are calculated and
controlled by the difference in motor speed
between M
+
and L–.
Fig. 8-2-1 Setting of air flow [FAN:AUTO]
(2) Hi POWER operation cannot be set.
8-2-2. Cooling operation
([MODE] button on the remote control is set to the
Cool ( ) operation.)
•
Once the setting is made, the operation mode is
memorized in the microcomputer so that the same
operation can be effected thereafter simply by
pushing [START/STOP] button.
•
A cooling operation signal is transmitted to outdoor
unit.
•
The outdoor unit controls the outdoor fan relay R01,
R02 and R03, and the compressor motor speed
according to the operation command signal sent
from the indoor unit.
•
When [FAN] button is set to AUTO, the indoor fan
motor operates as shown in Fig. 8-2-2. When [FAN]
button is set to LOW , LOW
+
, MED
,
MED
+
, HIGH
, the motor oper-
ates with a constant air flow.
NOTE :
*1: The values marked with *1 are calculated and
controlled by the difference in motor speed
between M
+
and L–.
Fig. 8-2-2 Setting of air flow [FAN:AUTO]
(1) Cooling capacity control
•
The cooling capacity and room temperature are
controller by changing the compressor motor
speed according to both the difference between
the temperature detected by the room tempera-
ture sensor and the temperature set by tempera-
ture (
) button and also any change in room
temperature.
•
When compressor has been activated or reacti-
vated, it operates with Max.33 rps for 2 minutes,
with Max.57 rps from 2 minutes to 3 minutes,
and with Max.64 rps after 3 minutes passed.
•
When room temperature is lower than set
temperature, indoor fan motor is operated at fan
speed L as shown in Fig. 8-2-1 while the outdoor
unit stops.
(2) Prevent-freezing control
If temperature of indoor heat exchanger detected
by the indoor heat exchanger sensor is 5°C lower,
compressor motor speed is gradually lower to
prevent freezing of the indoor heat exchanger. If
temperature is 7°C or higher, return the operation
to the above item (1).
+2
+2.5
+3
+1.5
+1
+0.5
0
M+
*1
*1
*1
L
(Room temp.)
– (Preset temp.)
Preset
temp.
*1
*1
*1
L
+3
+2.5
+2
+1.5
+1
+0.5
-0.5
0
M+
(Room temp.)
– (Preset temp.)
Preset
temp.
