Service manual
-
I
FEEL MONITOR lamp on
the
indoor unit
-
When
I
FEEL CONTROL button is pressed,
I
FEEL MONITOR lamp on the indoor unit pulsates with
beeps
and
shows
the temp.
control condition.
I
FEEL MONITOR lamp
\I
\/
,I
Shows difference between Set temp. and Room temp. is more than 3 deg. ('F)
During this condition,
I
FEEL button is not available.
Wait for about 15 min.
D?@
Shows dierence between Set temp. and Room temp. is 2 deg.
-
3 deg. ('F)
The buttons are available.
DD~
Shows Room temp. is almost Set temp. The difference is less than 2 deg. ('F)
The buttons are available.
NOTE
0
During
"I
FEEL CONTROL" operation, thermostat (SET TEMP.) is not available.
Use
"I
FEEL CONTROL"
buttons to set temp.
*Once the set temp. is set, the microprocessor memorizes the temp. and the system restarts at the same
set
temp.
*The set temp. range is 61
-
88°F in COOL DRY HEAT mode of
"I
FEEL CONTROL".
0
When the main power is turned off, the settings are canceled. Set temp. will
be
initial set temp. again. See
page 20.
-
COOL mode
of
"I
FEEL CONTROL"
-
Compressor
&
OFF
j
Outdoor fan motor
I
OFF
I
ON
Runs all the
time
in cooling
mode
Indoor fan motor
NOTE Coil frost prevention during COOL mode of
"I
FEEL CONTROL"
.When the indoor coil thermistor RT12 is below 47'F for MS-09, 37'F for MSH-09, 27'F for MSH-12/15
for 5 min. the coil frost prevention mode starts. The compressor stops for
5
min. and the indoor fan runs
at set speed. The coil frost prevention mode may continues past
5
min. untill the indoor coil thermistor RT12
exceeds 47'F for MS-09, 37'F for MSH-09, 27°F for MSH-12/15.
The first
5
minutes, termination of Coil Frost Prevention is controlled by time regardless of the termination
temperature. After that the termination is controlled by the temperature regardless of
time.
Therefore, Coil Frost Prevention continues at least
5
minutes even
if
the temperature reaches termination
point within
5
minutes. After
5
minutes, Coil Frost Prevention terminates if the temperature reaches to
termination point, or the mode
will
be
prolonged untill the temperature reaches to the termination point.
Indoor fan operates at the set speed by FAN CONTROL switch.
Followings are the fan speed in AUTO.
Room temp. minus Set temp.
:
more than 4
-
7 deg. ('F)
.-
HI
Room temp. minus Set temp.
:
4
deg. ('F) to 7 deg. ("F)
MED
Room temp. minus Set temp.
:
less than 2
--
3
deg. (OF)
...---
LO
-
DRY
mode of
"I
FEEL CONTROL"
-
The system uses the same refrigerant circuit as the cooling circuit for dry operation.
The compressor and the indoor fan are controlled by temp. and by the microprocessor.
By such controls, indoor Row amounts will
be
reduced in order to lower humidity without much room temp. decrease.
The operation of the comp. and indoor fan is as follows on the next page.