34
328 080000 01
Specifications subject to change without notice.
BRIEF DESCRIPTION OF MODES AND
FUNCTIONS
INDOOR UNIT
Basic System Functions
Cooling Mode
1. Under this mode, the fan and swing operate at the setting status.
The temperature setting range is 60.8~86.0
_
F.
2. During a malfunction of the outdoor unit or if the unit stops
because of protection, the indoor unit keeps the original
operation status.
Drying Mode
1. Under this mode, the fan operates at a low speed and the swing
function operates at the setting status. The temperature setting
range is 60.8~86.0
_
F.
2. During a outdoor unit malfunction or if the unit’s protection
mode stops the outdoor unit, the indoor unit retains the original
operation status.
3. The protection status is the same as that under the Cooling
mode.
4. The Sleep function is not available in the Drying mode.
Heating Mode
1. Under the Heating mode, the temperature setting range is
60.8~86.0
_
F.
2. The working condition and process for the heating mode: When
the unit is turned on under the Heating mode, the indoor unit
enters the cold air prevention status. When the unit is stopped or
in the OFF status, and the indoor unit has been started up
recently, the unit enters the residual heat−blowing status.
Working method for AUTO mode
1. Working condition and process for AUTO mode:
a. Under the AUTO mode, the standard heating Tpreset = 68.0
_
F
and the standard cooling Tpreset = 77.0
_
F. The unit switches
modes automatically according to the ambient temperature.
2. Protection function
a. During the cooling operation, the protection function is the same
as that under the Cooling mode.
b. During the heating operation, the protection function is the same
as that under the Heating mode.
3. Display: Set temperature is the set value under each condition.
Ambient temperature is (Tamb.−Tcompensation) for the heat
pump unit and Tamb. for the cooling only unit.
4. If the unit is equipped with the I FEEL function,
Tcompensation is 0 and the others are the same as follows.
5. Fan mode − Under this mode, the indoor fan operates at the set
fan speed. The compressor, outdoor fan, 4−way valve and the
electric heating tube stop operating. The user can select the
indoor fan to operate at either the high, medium, low or auto fan
speeds. The temperature setting range is 60.8~86.0
_
F.
Other Controls
1. Buzzer − Upon energization, before operating the unit or remote
controller, the buzzer emits a beep.
2. AUTO − If the user presses AUTO when turning off the unit,
the entire unit operates in the AUTO mode. The indoor fan
operates at the auto fan speed and the Swing function turns on.
Press AUTO during the ON status to turn off the unit.
3. Auto fan − (Heating mode) During the Auto Heating mode or the
normal Heating mode, the auto fan speed adjusts the fan speed
automatically according to the ambient temperature and the set
temperature.
4. Sleep − After setting the sleep function for a period of time, the
system adjusts the set temperature automatically.
5. Timer function − The general timer and clock timer functions are
compatible by equipping the remote controller with different
functions.
6. Memory function (memorize compensation temperature,
off−peak energization value) − (Memory content) mode, up and
down swing, light, set temperature, set fan speed, general timer
(clock timer cannot be memorized). After a power recovery, the
unit turns on automatically according to the memory content.
7. Health function − During the indoor fan operation, set the
Health function with the remote controller. Turning off the unit
also turns off the Health function. Turn on the unit by setting
the Auto and the Health function defaults to ON.
SEQUENCE OF OPERATION
Interface
A wireless remote control, supplied with the unit, is the interface
between the fan coil and the user. The wireless remote control has the
following characteristics:
S
Capable of displaying
_
C and
_
F with
_
F acting as the default setting.
To change the default setting, refer to the Owner’s Manual.
S
The remote control set point range is from 62
_
F (17
_
C) to 86
_
F
(30
_
C) in increments of 1
_
F (1
_
C).
S
The wireless remote control has an operating range of 25 ft. (7.62 m).
S
The same remote control can be used to control more than one unit.
S
If the remote control is lost, damaged, or the batteries are exhausted,
the system can be operated by using MANUAL (forced Auto)
located under the front panel.
Manual Button
AUTO/COOL
Fig. 58
-
Manual (Location on Unit)
Vacuum Pumping and Leak Detection
Use Vacuum Pump
1. Remove the valve caps on the liquid valve and the gas valve and
the nut of the refrigerant charging vent.
2. Connect the charging hose of the manifold to the refrigerant
charging vent of the gas valve and then connect the other
charging hose to the vacuum pump.
3. Open the manifold completely and operate for 10−15 min. to
check if the pressure of the piezometer remains in 500 microns.
4. Close the vacuum pump and maintain this status for 1−2 min. to
check if the pressure of the piezometer remains in 500 microns.
If the pressure decreases, there may be a leak.
5. Remove the manifold, open the valve of the liquid valve and the
gas valve completely.
6. Tighten the valves screw caps and the refrigerant charging vent
(see Fig. 59).
