7.
OUTLINE OF CONTROL CIRCUIT
94
NO.
ITEM
OUTLINE OF SPECIFICATION
REMARKS
3
Fan speed control
3-1 [AUTO], [HIGH], [MED], [LOW] are available,
3-2 In the auto fan. The fan speed is changed by the
difference between Ta, Ts, as shown below.
Whilst in heating
mode, and the
compressor is turned
off, the fan speed can
be [Ultra Low] or
[Stop] (See note 4).
4
Cold draft prevention
control
Tc is used to
prevent cold
drafts
Tc = Indoor coil
sensor
When performing heating
operation, indoor fan control is
carried out as follows based on
temperature detection of Tc sensor.
C zone:
Depending upon fan
speed setting of the
remote controller
B zone:
Indoor fan at Low
A zone:
Fan stop
+2
+1
Ts
-2
+1
Ts
-1
HEAT Mode
COOL Mode
“H”
“M”
“L”
“UL”
“H”
“M”
“L”
Room Temp (TA)
Room Temp (TA)
+3.5
+2.5
Tsc
Tsh
+0.5
-0.5
-2.5
-3.5
“M”
“H”
“L”
“UL”
“L”
“L”
“M”
“H”
“UL”
AUTO Mode
Room Temp (TA)
30
26
20
10
(
o
C)
C
B
A
Indoor Coil (TC)
5
Freeze preventing
control
(Low temp. release)
Full time
MIN 7 min.
MAX 20 min.
When performing cooling operation,
indoor fan control is carried out as
follows based on temperature
detection of Tc sensor.
1- When starting the operation,
the point P is made +3
˚
C.
2- When [J] zone is detected,
timer counting starts.
3- When [K] zone is detected,
timer count is stopped and
held on.
4- When [I] zone is detected, timer
is cleared and returns back to
ordinary operation.
5- When timer count becomes full time, the Outdoor Unit
stops and the point P is changed to +12
˚
C to be covered
by check display.
When [I] zone is reached (12°C), the temperature is
returned back to +3
˚
C.
Indoor Coil (TC)
P
I
K
J
O
(
°
C)
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