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Service Manual 25
Installation
1. Check that all tubing and wiring have been prop-
erly connected.
2. Check that the gas and liquid side service valves
are fully open.
Prepare remote control
1. Remove the battery cover
by pulling it according to the
arrow direction.
arrow direction.
2. Insert new batteries making
sure that the (+) and (–) of
battery are installed correctly.
battery are installed correctly.
3. Reattach the cover by
pushing it back into position.
• Use 2 AAA(1.5volt) batteries. Do not use
rechargeable batteries.
• Remove the batteries from the remote con-
trol if the system is not going to be used for
a long time.
a long time.
Settlement of outdoor unit
• Anchor the outdoor unit with a bolt and
nut(ø10mm) tightly and horizontally on a concrete
or rigid mount.
or rigid mount.
• When installing on the wall, roof or rooftop, anchor
the mounting base securely with a nail or wire
assuming the influence of wind and earthquake.
assuming the influence of wind and earthquake.
• In the case when the vibration of the unit is conveyed
to the hose, secure the unit with an
anti-vibration rubber.
anti-vibration rubber.
NOTICE
Evaluation of the performance
Operate unit for 15~20 minutes, then check the sys-
tem refrigerant charge:
tem refrigerant charge:
1. Measure the pressure of the gas side service
valve.
2. Measure the temperature of the intake and dis-
charge of air.
If the actual pressure are higher than shown,
the system is most likely over-charged, and
charge should be removed. If the actual
pressure are lower than shown, the system
is most likely undercharged, and charge
should be added.
The air conditioner is now ready for use.
the system is most likely over-charged, and
charge should be removed. If the actual
pressure are lower than shown, the system
is most likely undercharged, and charge
should be added.
The air conditioner is now ready for use.
NOTICE
Bolt
Tubing connection
Outside ambient TEMP The pressure of the gas side service valve
35°C(95°F)
4~5kg/cm
2
G(56.8~71.0 P.S.I.G.)
This is performed when the unit is to be relocated
or the refrigerant circuit is serviced.
Pump Down means collecting all refrigerant in the out-
door unit without loss in refrigerant gas.
or the refrigerant circuit is serviced.
Pump Down means collecting all refrigerant in the out-
door unit without loss in refrigerant gas.
CAUTION:
Be sure to perform Pump Down procedure with the
unit cooling mode.
Be sure to perform Pump Down procedure with the
unit cooling mode.
Pump Down Procedure
1. Connect a low-pressure gauge manifold hose to the
1. Connect a low-pressure gauge manifold hose to the
charge port on the gas side service valve.
2. Open the gas side service valve halfway and purge the
air from the manifold hose using the refrigerant gas.
3. Close the liquid side service valve(all the way in).
4. Turn on the unit's operating switch and start the cool-
4. Turn on the unit's operating switch and start the cool-
ing operation.
5. When the low-pressure gauge reading becomes 1 to
0.5kg/cm
2
G(14.2 to 7.1 P.S.I.G.), fully close the gas
side valve stem and then quickly turn off the unit. At
that time, Pump Down has been completed and all
refrigerant gas will have been collected in the outdoor
unit.
that time, Pump Down has been completed and all
refrigerant gas will have been collected in the outdoor
unit.
PUMP DOWN
3. Ensure the difference between the intake temper-
ature and the discharge is more than 8°C
(Cooling) or reversely (Heating).
(Cooling) or reversely (Heating).
4. For reference; the gas side pressure of optimum
condition is as below.(Cooling)
Discharge
temperature
temperature
Discharge air
Intake temperature
Test Running
26 Room Air Conditioner
Operation
DISPLAY
1) C/O Model (high quality LCD remote controller supplied)
Operation Indicator
• On while in appliance operation, off while in appliance pause
Timer Indicator
• On while in timer mode (on/off) and in sleep timer mode, off when timer mode is completed or canceled.
Comp. Running Indicator
• While in appliance operation, on while in outdoor unit compressor running, off while in compressor off
Plasma Indicator
• On while in plasma mode, off while plasma mode is canceled.
Auto restart Indicator
• On while auto restart mode, off while auto restart mode is canceled.
Auto restart
• In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate
procedures automatically to the previous operating conditions.
If your want to use this operation, press the Auto Restart Button.
If your want to use this operation, press the Auto Restart Button.
Power(Forced Operation)
• Operation starts, when this button is pressed and stops when you press the button again.
2) H/P Model (high quality LCD remote controller supplied)
Operation Indicator
• On while in appliance operation, off while in appliance pause
Timer Indicator
• On while in timer mode (on/off) and in sleep timer mode, off when timer mode is completed or canceled
Defrost Indicator
• Off except when hot start during heating mode operation or while in defrost control.
Plasma Indicator
• On while in plasma mode, off while plasma mode is canceled.
Auto restart Indicator
• On while auto restart mode, off while auto restart mode is canceled.
Auto restart
• In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate
procedures automatically to the previous operating conditions.
If your want to use this operation, press the Auto Restart Button.
If your want to use this operation, press the Auto Restart Button.
Power(Forced Operation)
• Operation starts, when this button is pressed and stops when you press the button again.
■ Cooling Mode Operation
• When the intake air temperature reaches 0.5°C below the setting temp, the compressor and the outdoor fan stop.
• When it reaches 0.5°C above the setting temp, they start to operate again.
Compressor ON Temp=> Setting Temp+0.5°C
Compressor OFF Temp => Setting Temp-0.5°C
• While in compressor running, operating with the airflow speed set by the remote controller. While in compressor
not running, operating with the low airflow speed regardless of the setting.
Function of Controls
Operation
Service Manual 27
Operation
■ Healthy Dehumidification Mode
• When the dehumidification operation input by the remote controller is received, the intake air temperature is
detected and the setting temp is automatically set according to the intake air temperature.
26°C
≤ Intake Air Temp => 25°C
24°C
≤ Intake Air Temp < 26°C => Intake Air Temp-1°C
18°C
≤ Intake Air Temp < 24°C => Intake Air Temp-0.5°C
Intake Air Temp < 18°C => 18°C
• While in compressor off, the indoor fan repeats low airflow speed and pause.
• While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidification
operation and 4-min compressor off repeat
Compressor ON Temp. => Setting Temp+0.5°C
Compressor OFF Temp. => Setting Temp-0.5°C
• In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.
■ Heating Mode Operation
• When the intake air temp reaches +3°Cabove the setting temp, the compressor is turned off. When below the
setting temp, the compressor is turned on.
Compressor ON Temp. => Setting Temp.
Compressor OFF Temp. => Setting Temp.+3°C
• While in compressor on, the indoor fan is off when the indoor pipe temp. is below 26®¨C , when above 28°C , it
operates with the low or setting airflow speed (while in sleep mode, with the medium airflow speed).
• While in compressor off, the indoor fan is off when the indoor pipe temp is below 33°C , when above 35°C , it
operates with the low airflow speed.
• If overloaded while in heating mode operation, in order to prevent the compressor from OLP operation, the out-
door fan is turned on/off according to the indoor pipe temp.
• While in defrost control, both of the indoor and outdoor fans are turned off.
■ Defrost Control
• While in heating mode operation in order to protect the evaporator pipe of outdoor unit from freezing, reversed
to cooling cycle to defrost the evaporator pipe of the outdoor unit.
• Defrost control is available 30 minutes later since heating mode operation started, and it will not polong over 6
minutes.
• Deicing starts only when the outdoor pipe temperature falls below -6°C after 30 minutes passed from starting of
heating operating and more than 10 minutes operation of compressor.
• Deicing ends after 6 minutes passed from starting of deice operation or when the outdoor pipe temperature rises
over 12°C even if before 6 minutes.
■ Fuzzy Operation (C/O Model)
• According to the temperature set by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting
temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on.
Compressor ON Temp => Setting Temp+0.5°C
Compressor OFF Temp => Setting Temp+0.5°C
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the
intake air temp at that time.
28 Room Air Conditioner
Operation
26°C
≤ Intake Air Temp => 25°C
24°C
≤ Intake Air Temp<26°C => Intake Air Temp+1°C
22°C
≤ Intake Air Temp<24°C => Intake Air Temp+0.5°C
18°C
≤ Intake Air Temp<22°C => Intake Air Temp
Intake Air Temp<18°C => 18°C
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature
automatically according to the Fuzzy rule.
automatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temper-
ature
■ Fuzzy Operation (H/P Model)
• When any of operation mode is not selected like the moment of the power on or when 3 hrs has passed since
the operation off, the operation mode is selected.
• When determining the operation mode, the compressor, the outdoor fan, and the 4 way valve are off and only
the indoor fan is operated for 15 seconds. Then an operation mode is selected according to the intake air
temp at that moment as follows.
temp at that moment as follows.
24°C
≤ Inatake Air Temp => Fuzzy Operation for Cooling
21°C
≤ Inatake Air Temp<24°C => Fuzzy Operation for Dehumidification
Inatake Air Temp<21°C => Fuzzy Operation for Heating
• If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10
sec or longer before Fuzzy operation, the mode before Fuzzy operation is operated.
1) Fuzzy Operation for Cooling
• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below
the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is
turned on.
turned on.
Compressor ON Temp => Setting Temp+0.5°C
Compressor OFF Temp => Setting Temp+0.5°C
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the
intake air temp at that time.
26°C
≤ Intake Air Temp => 25°C
24°C
≤ Intake Air Temp<26°C => Intake Air Temp+1°C
22°C
≤ Intake Air Temp<24°C => Intake Air Temp+0.5°C
18°C
≤ Intake Air Temp<22°C => Intake Air Temp
Intake Air Temp < 18°C => 18°C
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature
automatically according to the Fuzzy rule.
automatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature.
2) Fuzzy Operation for Dehumidification
• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below
the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is
turned on.
turned on.
Compressor ON Temp => Setting Temp+0.5°C
Compressor OFF Temp => Setting Temp+0.5°C
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