UNIT OPERA
TION
UNIT OPERA
TION
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P25 OF 34
OPERATION OF THE UNIT
A. AUTO MODE
Cool Only Unit
Heat Pump Unit
Mode
Pre-Set Temperature
Mode
Pre-Set Temperature
0
Above 78 F
Cool
Cool
0
77 F
0
77 F
0
From 68-78 F
Dry
Dry
0
(RT-35) F each 3 minutes
0
(RT-35) F each 3 minutes
0
Below 68 F
Heat
0
73 F
Room temperatures(RT)
When started, operation mode will turn into COOL or DRY or HEAT mode upon room temperature as shown in
the following table. Once AUTO operation mode is set, unit will change operation mode as the room temperature
changes. If unit restarts after last operation stops for two hours, it will start in the same mode as set before
operation was stopped. Press SWING button to change air flow direction up/down.
Heat
NA
B. COOL MODE
Pointing remote/line control to the unit, press MODE button until COOL is shown. Press TEMPERATURE
ADJUSTMENT button to change the setting temperature. In this mode, you can press SWING button or
MANUAL SWING button, if available, to change up/down air flow direction. Press FAN SPEED button to change
the fan speed of indoor unit. Once the temperature settled is reached, both indoor and outdoor unit will stop to
run. Outdoor unit will work again as soon as the indoor air temperature sensor feels the room temperature is 1 or
o
2 F higher than set temperature.
Once set temperature is reached, outdoor unit compressor and fan motor will stop working right away, outdoor
reversing valve stays un-energized.
1) If "circulation" function is built in (2008.06 or ealier production), then the indoor fan will keep on rotating to
circulate the air in the room, so that air temperature stratefication will not be caused, and then compressor will
not come on and go off often.
2) If "circulation" function is NOT built in (2008.06 or later production), then the indoor fan will keep on rotating for
60 to 90 seconds to blow out the residual cooling capacity left on cold coil, then shut off.
Once the sensed indoor temperature is 1 or 2 F above set temperature and the 3-mintue compressor restarting
protection time is passed, indoor unit fan motor and outdoor unit compressor and fan motor will resume to work
right away.
C. DRY MODE
Pointing remote/line control to the unit, press MODE button until DRY is shown. In this mode, you can press
SWING button or MANUAL SWING button, if available, to change up/down air flow direction. Press FAN SPEED
button to change the fan speed of indoor unit.
D. FAN MODE
Pointing remote/line control to the unit, press FAN button until DRY is shown. In this mode, you can press
SWING button to change up/down air flow direction. Press FAN SPEED button to change the fan speed of indoor
unit.
F. TIMER
"CANCEL"
Once TIMER "CANCEL" button is pressed, previous TIMER set-up shall be cleared and all TIMER related signs
go off.
NOTICE:
To cancel timer, press CANCEL button of the Timer. If power sets off, time must be reset, otherwise
Timer Operation will not be right.
OPERATION OF THE UNIT
CONFIRM
OFF
ON
TIMER
CANCEL
E. HEAT MODE
Pointing remote/line control to the unit, press MODE button until HEAT is shown.
In this mode, you can press FAN SPEED button to change the fan speed of indoor unit. Press TEMPERATURE
ADJUSTMENT button to change the setting temperature. As heat pump starts indoor unit will not start to blow air
only until the sensed indoor coil copper tube temperature is warm enough (anti-cold blowing). Outdoor fan motor
and compressor will start to work right away. In heat pump mode, larger pipe at outdoor unit should be hot and
smaller pipe should be warm.
NOTES:
4) Heater will start as supplemental heat to heat pump, once the outdoor temperature is low and the difference
between sensed indoor temperature and sensed indoor coil temperature is lower than the designated value.
o
o
5) Suggest set indoor temperature between 68 F and 75 F. Heating efficiency becomes inferior when room
o
temperature is below 35 F.
Once set temperature is reached, outdoor unit compressor and fan motor will stop working right away, outdoor
reversing valve stays energized for 2 minutes, while indoor unit will keep on blowing residual heat for a little while
before it fully stops.
1) If "circulation" function is built in (2008.06 or ealier production), then the indoor fan will keep on rotating to
circulate the air in the room, so that air temperature stratification will not be caused, and then compressor will
not come on and go off often.
2) If "circulation" function is NOT built in (2008.06 or later production), then the indoor fan will keep on rotating for
60 to 90 seconds to blow out the residual heating capacity left on warm/hot coil, then shut off.
Once the sensed indoor temperature is 1 or 2 F below set temperature and the 3-mintue compressor restarting
protection time is passed, outdoor reversing valve will be energized first, then outdoor unit compressor and fan
motor will resume to work. Indoor blower will start to blower warm air once the indoor coil is warm enough
(sensed temperature).
"TIMER ON" AND "TIMER OFF"
Once pressed, TIMER related signs show up and hour sign blinks. If pressing TIMER "ON" or "OFF" button, time
changes at 1hr/press (being held down intermittently) or 1hr/0.5second (being held down continuously); If no
action 5 seconds after pressing TIMER "ON" or "OFF", or "CONFIRM" button is not pressed 5 seconds after time
adjustment is made, TIMER related signs will go off in another 10 seconds.
"CONFIRM"
Once TIMER "CONFIRM" button is pressed, set-up of TIMER "ON" or TIMER "OFF" is actuated.
"TIMER ON" is to set up the hour span from now on when the unit will be turned ON. "TIMER OFF" is to set up
the hour span from now on when the unit will be turned OFF. "TIMER ON" or "TIMER OFF" set-up must be input
by pressing the "TIMER CONFIRM" button.
3) During heat pump mode, outdoor unit may need to defrost to get rid of ice/frost built up in cold weather as
much as possible. In this case indoor fan motor stops, outdoor compressor works, outdoor fan motor cycles
unit defrost cycle quits upon both sensed temp and/or time.
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
