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AIRCONDITIONER
FLOOR STANDING TYPE
SERVICE MANUAL
RS-FS60AB/RU-60AC3
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CONTENTS
1. Safety Precautions ............................................................................................................. 1
1.1 Precaution ............................................................................................................................ 1
1.2 Installation ............................................................................................................................ 1
1.3 Caution ................................................................................................................... ............. 1
1.4 Operational ............................................................................................................... ........... 2
2. Dimension .................................................................................................................. ........ 3
2.1 Indoor Unit ............................................................................................................................ 3
2.2 Outdoor Unit ............................................................................................................ ............. 4
3. Refrigerant cycle diagram ................................................................................................. 4
3.1 Heat pump mode .................................................................................................................. 4
4. Wiring diagram ............................................................................................................. ...... 5
4.1 RS-FS60AB ......................................................................................................................................... 5
5. Installation details .............................................................................................................. 6
5.1 Installation place ...................................................................................................... ............ 6
5.2 Installing .............................................................................................................. ................. 8
5.3 Refrigerant pipe connection ............................................................................................. .. 10
5.4 Drain Pipe of The Indoor Unit ........................................................................................... .. 21
5.5 Wiring .................................................................................................................. ............... 22
5.6 TEST RUN ................................................................................................................. .......... 22
6. External view and display ............................................................................................... 23
6.1 PARTS NAMES ............................................................................................................. ..... 23
6.2 CONT ROL PANEL ........................................................................................................... .. 24
6.3 LED ..................................................................................................................... ............... 25
7. Operation characteristics ................................................................................................ 26
8. Electronic function ........................................................................................................ .. 26
8.1 Main data Introduction .................................................................................................... ... 26
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8.2 Operation Modes and Functions ........................................................................................ 26
8.3 Other Functions ........................................................................................................... ...... 29
9. Characteristic of temperature sensor ............................................................................ 30
10. Trouble shooting .......................................................................................................... .... 30
10.1 Protective Function ............................................................................................................. 30
10.2 Self-diagnosis .................................................................................................................... 32
10.3 LEDs for the indication of outdoor trouble .......................................................................... 32
10.4 Troubles and Solutions ...................................................................................................... 33
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1. Safety Precautions
1.1 Precaution
To prevent injury to the user or other people and property damage, the following instructions
must be followed.
Incorrect operation due to ignoring instruction will cause harm or damage.
Before service unit, be sure to read this service manual at first.
1.2 Installation
For electrical work, contact the dealer, seller, a qualified electrician, or an Authorized service
center.
Do not disassemble or repair the product by yourself.
Sharp edges could cause injury, be especially careful of the case edges and the fins on the
condenser and evaporator.
Be sure the installation area does not deteriorate with age.
Take care to ensure that power cable could not be pulled out or damaged during operation.
Do not place anything on the power cable.
Do not plug or unplug the power supply plug during operation.
Do not store or use flammable gas or combustible near the product.
When flammable gas leaks, turn off the gas and open a window for ventilation before turn the
product on.
If strange sounds, or small or smoke comes from product. Turn the breaker off or disconnect the
power supply cable as soon as possible.
When the product is soaked (flooded or submerged), contact an Authorized service center.
Be caution that water could not enter the product.
Turn the main power off when cleaning or maintaining the product.
When the product is not be used for a long time, disconnect the power supply plug or turn off the
breaker.
1.3 Caution
Always check for gas (refrigerant) leakage after installation or repair of product.
Install the drain hose to ensure that water is drained away properly.
Keep level even when installing the product.
Do not install the product where the noise or hot air from the outdoor unit could damage the
neighborhoods.
Use two or more people to lift and transport the product.
Do not install the product where it will be exposed to sea wind (salt spray) directly.
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1.4 Operational
Do not expose the skin directly to cool air for long periods of time. (Do not sit in the draft).
Do not use the product for special purposes, such as preserving foods, works of art, etc. It is a
consumer air conditioner, not a precision refrigerant system.
Do not block the inlet or outlet of air flow.
Use a soft cloth to clean. Do not use harsh detergents, solvents, etc.
Do not touch the metal parts of the product when removing the air filter. They are very sharp.
Do not step on pr put anything on the product. (outdoor units)
Always insert the filter securely. Clean the filter every two weeks or more often if necessary.
Do not insert hands or other object through air inlet or outlet while the product is operated.
Do not drink the water drained from the product.
Use a firm stool or ladder when cleaning or maintaining the product.
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2. Dimension
2.1 Indoor Unit
Dimension
Mode
W
(mm)
D
(mm)
H
(mm)
55K 600 358 1900
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2.2 Outdoor Unit
Dimension
Mode
W
(mm)
D
(mm)
H
(mm)
W1
(mm)
A
(mm)
B
(mm)
55K 940 360 1245 1020 602 380
3. Refrigerant cycle diagram
3.1 Heat pump mode
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4. Wiring diagram
4.1 RS-FS60AB
Indoor Unit
Outdoor Unit
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5. Installation details
5.1 Installation place
5.1.1 Indoor Unit
a.Ensure the spaces indicated by arrows from the wall, ceiling, fence or other obstacles.
b.There should not be any heat source or steam near the unit.
c.There should not be any obstacles blocking the air circulation.
d.A place where air circulation in the room is good.
e.A place where drainage can be easily done.
f.Do not install the unit near the door way.
g.There should not be any direct sunlight. Otherwise, the sun will fade the plastic
cabinet and affect its appearance. If unavoidable, sunlight prevention should be taken into
consideration.
5.1.1.1 Please stand the unit in hard and flat ground;
Please reserve space for installation and maintenance.
5.1.1.2 Please check the elevation difference between the indoor unit and the outdoor
unit, the length of the refrigerant pipe, and the curved places (bend) of the pipe are no
more than the following numbers:
Elevation difference: no more than 15 M (if the elevation difference between indoor
and outdoor unit is more than 15 meters, it is recommended
that the indoor unit be located higher than the outdoor unit.)
Pipe length: no more than 30M
Bends: no more than 3 places.
5.1.2 Outdoor Unit
The outdoor unit should be put in a position that guarantees the minimum space for
sufficient air circulation and to allow maintenance work and the connections of electrical
and refrigerant circuit lines. It may be installed on a floor or flat roof or wall-mounted,
provided its weight isproperly supported and there is no transmission of vibration to the
adjacent rooms.
5.1.2.1 Before installing the outdoor unit, you should:
a).If an awning is built over the unit to prevent direct sunlight or rain, be careful that heat
radiation from the condenser is not obstructed.
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b).Select a place that is easy to connect indoor unit's pipe and electric wires.
c).Avoid a place where combustible gas may leak or stay.
d).Keep it in mind that water may drain out of the outdoor unit while in "Heat" mode.
e).Ensure the space around the back and sides and the front of the unit.
f).Take the air conditioner weight into account and select a place where noise and
vibration are minimum.
5.1.2.2 If the outdoor unit is to be installed on a roof or where no constructions are around,
you should avoid hard wind blows directly to the air outlet, because it may
cause trouble for air-flow shortage.
5.1.2.3 Reserve enough space for installation, maintenance and unit-functioning.
Remove as many obstacles as possible nearby.
Caution:
Installation in the following places may cause trouble. If it is unavoidable to use in such
places,please consult with the dealer.
(1) A place full of machine oil.
(2) A saline place such as coast.
(3) Hot-spring resort.
(4) A place full of sulfide gas.
(5) A place where there are high frequency machines such as wireless installation,
welding machine, medical facility.
(6) A place of special environmental conditions.
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5.2 Installing
5.2.1 Indoor Unit:
1. Anti-falling;
To prevent the indoor unit from falling, you must:
a. Pay full attention to the unit because its long outer shape makes it easy to fall;
b. Firmly fix the unit to the wall or in the ground to avoid accidental falling.
2. Dismounting the air-inlet grid
Please take off the air-inlet grid before connecting the pipes/wires.
Pull down the two knobs marked "PULL" on the grid, take off the two straps,
then the air-inlet grid goes free.
3. Take the Pipe Clip off before connecting the pipes and wiring; fit it when these finished.
Use accessories to connect the pipes/wires on both sides and back side.
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5.2.2 Outdoor Unit:
1. Ship the a/c to the installation place originally packed;
2. Be careful while hanging the unit because the center of gravity of the unit is not
centralized;
3. Do not make the angle of inclination more than 45 degrees while shipping;(Avoid
horizontal storage)
4. Be sure the electric insulation work is well done if installed on metal ceiling / wall.
5. Fix the unit feet with bolts (M10). Be sure the unit is fixed strongly enough to against
blast or earthquake.
6. Make a concrete basement to the unit by the above references.
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Dimension
Mode
A
(mm)
B
(mm)
55K 602 380
5.3 Refrigerant pipe connection
5.3.1 Pipe length and the elevation
The correct refrigerant quantity filled in the 5-meter-long pipe of the outdoor unit is marked
on the Product Data Plate. If you have to use longer pipe for every meter plus pipe, the
refrigerant should be added according to the following calculation.
Capacity
Btu/h
Pipe size
Standard
length
(m)
Max.
Elevation
B (m)
Max.
Length
A (m)
Additional
refrigerant
(g/m)
Gas Liquid
60K
3/4’’
(Ф19)
1/2’’
(Ф12.7)
5 15 30 60
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Caution:
Capacity is base on standard length and maximum allowance length is base of reliability.
Oil trap should be installed per 5-7 meters.
5.3.2 Piping connection
5.3.2.1 Connecting Of Refrigerant Pipe
a) Only the correctly installing of indoor and outdoor unit done, can the refrigerant
pipe be connected.
b) The cut-off valves are completely close before ex-work. Before connecting the
refrigerant pipe, be careful to check whether the valves are completely close.
c) The connecting procedure of refrigerant pipe: first, unscrew the two valves on
the outdoor unit and the pipe-jointing nut on the indoor unit(please keep them
care fully). Please connect the refrigerant pipe according to the manual, the
pipe-jointing nut should be screw tightly and no leakage. Note: you need two
wrenches to make balance.
d) When the connecting of refrigerant pipe is finished, before power on the system,
you should vacuum the indoor unit through the maintenance port on the cut-off
valves, or open the high-pressure valve, and exhaust the air through the
maintenance port on the low-pressure valve(closed). It will take about ten
seconds. Then screw tightly the maintenance port. (When supplement the
refrigerant, fill through the maintenance port of the low-pressure valves on the
outdoor unit ).
e) Open all the valves completely before power on the system, or it will be sick for
low efficiency.
f) Gas leak check. Make sure no gas from connections with leak detector or soap
water.
5.3.2.2 Pipe Connecting Procedures
Completely shut the cut-off valves of the outdoor unit (as ex-work status). Unscrew
the nuts on the cut-off valves and immediately connect the reamer joint (in 5 minutes). If it
last too long, dust,vapor and other obstacles may enter the pipe and cause trouble later
on. Before connecting the pipe, the air in the pipe shoul d be removed in advance by
releasing refrigerant R-410A.
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Notes for the bendable pipe
a. The bendable pipe should be used on the indoor side;
b. Bend angel may not exceed 90 degrees;
c. The bend location should be made on the center of the pipe if possible, as for bend
radius, the bigger the better;
d. The bendable pipe may not be bent for more than 3 times.
Bend the thin pipe
a. While bending, expose the pipe by cutting the concave gap on the bending
heat-insulation pipe(roll it with soft band after bent).
b. To avoid pipe deformation, the radius is the bigger the better.
c. Use a pipe-bending device to make the compact bending pipe.
5.3.2.3 Using bronze pipe selling in market
Completely shut the cut-off valves of t he outdoor unit (as ex-work status). After the
refrigerant pipe has been connected with both the indoor and outdoor unit, let the air
exhaust out from the maintenance gap on he low-pressure cut-off valves of the
outdoor unit. Screw the nuts tightly on t he maintenance gap after the air has been
drained.
5.3.2.4 To make the refrigerant pipe unblocked completely
You should keep the cut-off valves of the outdoor unit completely open after you have
finished the above steps (5.3.2.2 or 5.3.2.3)
Note:
1.Before screwing the reamer nut, smear the pipe and the connecting surface with
refrigerant oil;
2.Check and make sure there is no leakage by soap-water or leakage-checker after
connecting;
3.Be sure the connecting joint on the indoor side is insulated.
4.Use two wrenches to connecting the pipes.
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Outside diameter Torque
Additional
tightening
torque
mm inch N.cm N.cm
Ф12.7 1/2 4950 6030
Ф19 3/4 9720 11860
5.3.3 Air purging with vacuum pump
Air and moisture in the refrigerant system have undesirable effects as below:
● Pressure in the system rises.
● Operating current rises.
● Cooling or heating efficiency drops.
● Moisture in the refrigerant circuit may freeze and block capillary tubing.
● Water may lead to corrosion of parts in the refrigerant system.
Therefore, the indoor units and the pipes between indoor and outdoor units must be leak
tested and evacuated to remove gas and moisture from the system.
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Air purging with vacuum pump
1. Completely tighten the flare nuts of the indoor and outdoor units, connect the manifold
valve charge.
2. Connect the charge hose connection to the vacuum pump.
3. Fully open the handle Lo of the manifold valve.
4. Operate the vacuum pump to evacuate. After starting evacuation, slightly loose the flare
nut of the Lo valve on the gas pipe side and check the air is entering. (Operation noise of
the vacuum pump changes and a compound meter indicates 0 stead of minutes)
5. After the evacuation is complete, fully close the handle Lo valve of the manifold valve
and stop the operation of the vacuum pump. Make evacuation for 15 minutes or more and
check the compound meter indicates -76cmHg(-1x10
5
Pa).
6. Turn the stem of the Hi valve about 45°counterclockwise for 6 or 7seconds after the gas
coming out, then tighten the flare nut again. Make sure the pressure display in the
pressure indicator is a little higher than the atmosphere pressure.
7. Remove the charge hose from the Lo pressure charge hose.
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8. Fully open the Hi and Lo packed valve.
9. Securely tighten the cap of the packed valve.
Gas leak check
Soap water method
Apply soap water or a liquid neutral detergent on the indoor unit connections or outdoor
unit connections by a soft brush to check for leakage of the connecting points of the piping.
If bubbles come out, the pipes have leakage.
5.3.4 Pumping down (Re-installation)
Procedure
1. Confirm that both the 2-way and 3-way valves are set to the opened position.
Remove the valve stem caps and confirm that the valve stems are in the opened
position.
Be sure to use a hexagonal wrench to operate the valve stems.
2. Operate the unit for 10 to 15 minutes.
3. Stop operation and wait for 3 minutes, then connect the charge set to the service
port of the 3-way valve.
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Connect the charge hose with the push pin to the gas service port.
5. Air purging of the charge hose.
Open the low-pressure valve on the charge set slightly to purge air from the charge
hose.
6. Set the 2-way valve to the close position.
7. Operate the air conditioner at the cooling cycle and stop it when the gauge
indicates 0.1MPa.
8. Immediately set the 3-way valve to the closed position.
Do this quickly so that the gauge ends up indicating 0.3 to 0.5Mpa.
Disconnect the charge set, and amount the 2-way and 3-way valve’s stem nuts and
service port caps.
Use a torque wrench to tighten the service port cap to a torque of 1.8 kgf.m.
Be sure to check for gas leakage.
5.3.5 Re-air purging (Re-installation)
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Procedure:
1. Confirm that both the 2-way and 3-way valves are set to the closed position.
2. Connect the charge set and a charging cylinder to the service port of the 3-way
valve.
Leave the valve on the charging cylinder closed.
3. Air purging.
Open the valves on the charging cylinder and the charge set. Purge the air by
loosening the flare nut on the 2-way valve approximately 45’ for 3 seconds then closing
it for 1 minute; repeat 3 times.
After purging the air, use a torque wrench to tighten the flare nut to on the 2-way
valve.
4. Check the gas leakage.
Check the flare connections for gas leakage.
5. Discharge the refrigerant.
Close the valve on the charging cylinder and discharge the refrigerant until the gauge
indicates 0.3 to 0.5 Mpa.
6. Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way
valves to the open position.
Be sure to use a hexagonal wrench to operate the valve stems.
7. Mount the valve stems nuts and the service port cap.
Be sure to use a torque wrench to tighten the service port cap to a torque 18N.m.
Be sure to check the gas leakage.
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5.3.6 Balance refrigerant of the 2-way, 3-way valves
Procedure:
1. Confirm that both the 2-way and 3-way valves are set to the open position.
2. Connect the charge set to the 3-way valve’s service port.
Leave the valve on the charge set closed.
Connect the charge hose with the push pin to the service port.
3. Open the valves (Low side) on the charge set and discharge the refrigerant until
the gauge indicates 0.05 to 0.1Mpa.
If there is no air in the refrigeration cycle [the pressure when the air conditioner is not
running is higher than 0.1Mpa, discharge the refrigerant until the gauge indicates 0.05 to
0.1 Mpa. If this is the case, it will not be necessary to apply an evacuation.
Discharge the refrigeration gradually; if it is discharged too suddenly, the refrigeration oil
sill be discharged.
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5.3.7 Evacuation
Procedure:
1. Connect the vacuum pump to the charge set’s centre hose.
2. Evacuation for approximately one hour.
Confirm that the gauge needle has moved toward -0.1 Mpa (-76 cmHg) [vacuum of 4
mmHg or less].
3. Close the valve (Low side) on the charge set, turn off the vacuum pump, and
confirm that the gauge needle does not move (approximately 5 minutes after turning off
the vacuum pump).
4. Disconnect the charge hose from the vacuum pump.
Vacuum pump oil, if the vacuum pump oil becomes dirty or depleted, replenish as
needle.
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5.3.8 Gas charging
Procedure:
1. Connect the charge hose to the charging cylinder.
Connect the charge hose which you disconnected from the vacuum pump to the
valve at the bottom of the cylinder.If the refrigerant is R410A, make the cylinder bottom up
to ensure liquid charge.
2. Purge the air from the charge hose.
Open the valve at the bottom of the cylinder and press the check valve on the charge
set to purge the air (be careful of the liquid refrigerant).
3. Open the valves (Low side) on the charge set and charge the system with liquid
refrigerant.
If the system cannot be charge with the specified amount of refrigerant, if can be
charged with a little at a time (approximately 150g each time0 while operating the air
conditioner in the cooling cycle; however, one time is not sufficient, wait approximately 1
minute and then repeat the procedure.(pumping down-pin).
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4. Immediately disconnect the charge hose from the 3-way valve’s service port.
Stopping partway will allow the refrigerant to be discharged.
If the system has been charged with liquid refrigerant while operating the air
conditioner, turn off the air conditioner before disconnecting the hose.
5. Mounted the valve stem caps and the service port
Use torque wrench to tighten the service port cap to a torque of 18N.m.
Be sure to check for gas leakage.
5.4 Drain Pipe of The Indoor Unit
1.Make sure the drain pipe is connected to the outdoor side downward;
2.The hard polyvinyl chloride(PVC)plastic pipe (external diameter 26 mm) sold is the
market is suitable for the attached soft drain pipe;
3.Please connect the Soft Drain Pipe with the Drain Pipe, then fix it with band;
4.If you have to connect the Drain Pipe indoors, to avoid condensing caused by air intake,
you must cover the pipe with heat-insulation material (polyethylene with Specific Gravity
of 0.03, at least 9 mm in thickness), and use Glue Band to fix it.
5.After the Drain Pipe has been connected, please check if the water drains out of the
pipe efficiently and has no leakage.
6.Refrigerant pipe and Drainpipe should be heat-insulated to avoid condensing and
water-dropping later on.
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5.5 Wiring
Please refer to the Wiring Diagram.
Note: The power supply of the air conditioner is different according to the models. Please
refer to the WIRING DIAGRAM pasted on the indoor and outdoor units before wire
connection.
5.6 TEST RUN
1. Make sure the resistance between the sock et of the electric system and the
grounded line,when detected by a 500 V million-ohmmeter, is at least 2 million ohms. If
the resistance is less than the number, please do not use the air conditioner;
2. Check again if the air conditioner is properly installed, especially for the anti-falling
device;
3. When accomplished all the above procedures, service people should explain and
test the air conditioner for the customer according to the "User's Manual".
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6. External view and display
6.1 PARTS NAMES
This unit consists of indoor unit and outdoor unit.
Note:
All the pictures in this manual are for explanation purpose only. They may be slightly
different from the air conditioner you purchased(depend on model). The actual shape
shall prevail.
Air Outlet Let the conditioned air go out from it.
Control Panel (inserted) Cons ists of indicators and control buttons.
Air Inlet Where a filter is settled, absorbing the air in the room and
clean it.
Drain Pipe From which the condensed water is drained.
Refrigerant Pipe In whic h the refrigerant passes through, connects the
outdoor unit with the indoor unit.
Outdoor(condensing)Unit Consists of compressor, fan motor, heat-exchanger and
other electric parts.
Decorative LED Displays green or red lights according to running mode.
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6.2 CONTROL PANEL
On/Off button: Power-on and power-off the A/C(Air conditioner)
LED indicator :Lights when unit runs normally ,flashes one time per second when the unit
is waiting for orders ,flashes two times per second when the unit is sick.
Mode select button : Use this button to select among the following 5 modes :
Auto :automatically adjust the temperature (17~30℃)
Cool :normal cooling operation(17~30 ℃)
Heat :(for cooling and he ating only)normal heating operation(17~30℃)
Dry :dehumidify the room air and keep the indoor temperature(17~30℃)
Fan :fan only ,no cooling
Temp .adjusting buttons :
warm ▲ :push this button to raise the setting temperature
cool ▼ :push this button to lower the setting temperature.
Fan Speed button :
Auto :automatically adjust the fan speed
Low :Low fan speed.
Med :Medium fan speed
High :High fan speed
Swing /fresh button :push this button to make the air-flow blow left or right and anion
producer open.
Time/clock Alter button (Short form :ALT button):use this button to alter the modes
between ‘time’ and ‘clock’.
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Time adjusting button:
‘Hour’: set the hour of current time
‘Minute’: set the minute of current time
Confirm/Cancel button :Push this button to confirm or cancel the timer setting
Test Running button :Push this button to make the unit run for an hour of test ,this function
is specially designed for maintenance technicians.
6.3 LED
A. Operation modes
B. Timer setting clock or trouble display
C. Timer display
D. Types of clock
E. Room temperature setting display
F. Fan speed of the indoor unit display
G. Status display
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7. Operation characteristics
Mode
Temperature
Cooling
operation
Heating operation
Drying
operation
Room temperature
17℃~32℃ 17℃~30℃ 17℃~32℃
Outdoor temperature
18℃~43℃ -7℃~24℃ 18℃~ 43℃
CAUTION:
1. If air conditioner is used outside of the above conditions, certain safety protection
features may come into operation and cause the unit to function abnormally.
2. Room relative humidity less than 80%. If the air conditioner operates in excess of
this figure, the surface of the air conditioner may attract condensation. Please sets the
vertical air flow louver to its maximum angle (vertically to the floor), and set HIGH fan
mode.
3. Optimum performance will be achieved within this operating temperature.
8. Electronic function
8.1 Main data Introduction
Ts : Set temperature,
T1 : Room temperature
T2: Evaporator pipe temperature
T3: Condenser pipe temperature
T4: Outdoor ambient temperature
8.2 Operation Modes and Functions
8.2.1 Manual Operation
8.2.2 Heating Mode
8.2.2.1 Four-way valve opens at once and anti-cold air function opens at the same time,
electric heaters starts or stops according to 8.2.2.5.
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8.2.2.2 Condition for the compressor and outdoor fan action: (Ts=set temperature,
T1=room temperature)
8.2.2.3 Indoor Fan Action
Auto fan in heating mode
8.2.2.4 Anti-cold air:
Switchover between fan speed and fine tune can be set according to temperature of
evaporator pipe (T2).
8.2.2.5 Electric heaters (only available to some modes)
Electric heaters only opens in heating mode
8.2.3 Defrost (only available to heating mode)
8.2.3.1 Defrosting Conditions
Starting Of Defrosting Condition (meet one of the following is ok):
(1) Under evaporator high temperature protection, the accumulated time when
outdoor fan motor is off and compressor is on reaches up to over 90 minutes. ( IF
compressor shuts down , calculate time again).
(2) Accumulated compressor operating time when temperature of outdoor heat
exchanger coil T3 is below -2°C reaches up to over 40 minutes. ( IF compressor shuts
down , calculate time again).
Condition Compressor and outdoor fan( High)
Ts-T1 ≥ 1°C and compressor is off
reaches up to over 4 minutes
On
T1-Ts>2°C Off
Condition Fan speed
Ts-T1 ≥4°C
High
2°C≤Ts-T1 < 4°C
Med
Ts-T1 < 2°C Low
Condition Fan speed
Room temperature up T2<25°C Off
25°C <T2<32°C Breeze
T2>32°C Set fan speed
Room temperature down T2>30°C Set fan speed
30°C >T2>20°C Breeze
T2<20°C Off
Condition Electric heaters
Ts-T1 > 6°C and indoor fan opens,T2 < 50 °C On
T1≥Ts or indoor fan closes or T2 > 52 °C
Off
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8.2.3.2 Defrosting Action
Four-way valve, indoor fan, outdoor fan are shut down. Compressor keeps on.
8.2.3.3 Ending Of Defrosting Condition (meet one of the following is ok):
(1)Time of defrosting lasts 10 minutes.
(2) Temperature of outdoor coil T3 is up to 20°C.
(3) High temperature protection opens(When compressor shuts down), defroste will end,
calculate time again.
8.2.4 Cooling Mode
8.2.4.1 Conditions for the compressor and outdoor fan action (Ts = set temperature)
8.2.4.2 Action of Indoor Fan
HIGH/ MED /LOW/AUTO fan can be switched over by your comfort.
Auto fan under cooling mode.
8.2.5 Dehumidifying Mode
8.2.5.1 Indoor fan speed is low.
8.2.6 Auto Mode
8.2.6.1. Under auto mode, the indoor fan is set to be auto.
8.2.6.2 When entering auto mode, the heating, fan only or cooling operation will be
automatically chosen according to the room temperature T1 and the set temperature Ts.
Condition Mode
3°C≤T1-Ts
Cooling
-3°C≤ T1-Ts≤3°C
Fan
T1-Ts<-3°C Heating(fan for cooling only type)
8.2.6.3. After one mode is chosen, the operation mode will be re-chosen according to the
T1 and Ts.
Condition Mode
3°C≤T1-Ts
Cooling
-3°C≤ T1-Ts≤3°C
Former mode
T1-Ts<-3°C Heating(fan for cooling only type)
Condition Compressor and outdoor fan
T1-Ts≥ 1°C and compressor is off
reaches up to over 3 minutes
On
Ts-T1>1°C Off
Condition Fan speed
T1-Ts≥4°C
High
2°C≤ T1-Ts < 4°C
Med
T1-Ts < 2°C Low
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8.2.7 Fan Only Mode
8.2.7.1 Under this mode, four-way valve, compressor and outdoor fan are shut down,
indoor fan keeps on.
8.2.7.2 High/Med/Low/Auto fan can be switched over through manual control.
8.2.7.3 Under auto mode, the indoor fan is set to be Med.
8.3 Other Functions
8.3.1 LCD display
Mode, Set temp.,fan speed, time, timer, etc.
8.3.2 Timer
The machine should be provided with max. Interval of 24h.
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9. Characteristic of temperature sensor
10. Trouble shooting
10.1 Protective Function
10.1.1 3-minute delay for the compressor start-up
At the beginning of energizing the compressor starts at once, after the stop of the
compressor in any modes, 3-minute(cooling) or 4-minute(heating) delay will be needed to
start the compressor.
When switching over between cooling/heating mode, the compressor stops automatically
While Defrosting the compressor keeps on.
10.1.2 Evaporator protection against high temperature
10.1.2.1 Only avail able under heating mode.
Temp.℃Resistance KΩ Temp.℃Resistance KΩ Temp.℃Resistance KΩ
-10 62.2756 17 14.6181 44 4.3874
-9 58.7079 18 13.918 45 4.2126
-8 56.3694 19 13.2631 46 4.0459
-7 52.2438 20 12.6431 47 3.8867
-6 49.3161 21 12.0561 48 3.7348
-5 46.5725 22 11.5 49 3.5896
-4 44 23 10.9731 50 3.451
-3 41.5878 24 10.4736 51 3.3185
-2 39.8239 25 10 52 3.1918
-1 37.1988 26 9.5507 53 3.0707
0 35.2024 27 9.1245 54 2.959
1 33.3269 28 8.7198 55 2.8442
2 31.5635 29 8.3357 56 2.7382
3 29.9058 30 7.9708 57 2.6368
4 28.3459 31 7.6241 58 2.5397
5 26.8778 32 7.2946 59 2.4468
6 25.4954 33 6.9814 60 2.3577
7 24.1932 34 6.6835 61 2.2725
8 22.5662 35 6.4002 62 2.1907
9 21.8094 36 6.1306 63 2.1124
10 20.7184 37 5.8736 64 2.0373
11 19.6891 38 5.6296 65 1.9653
12 18.7177 39 5.3969 66 1.8963
13 17.8005 40 5.1752 67 1.83
14 16.9341 41 4.9639 68 1.7665
15 16.1156 42 4.7625 69 1.7055
16 15.3418 43 4.5705 70 1.6469
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10.1.2.2 The operation princi ple is as follows: (T2 = evaporator temperature)
Condition Outdoor fan Compressor
Room temperature up T2>56°C Off On
T2>60°C Off Off
Room temperature down T2>54°C Off Off
T2<54°C On On
10.1.2.3 The restart of the compressor shall execute the delay protection.
10.1.3 Evaporator Protection against low temperature
10.1.3.1 Only available under cooling and dehumidifying status.
10.1.3.2 Protection principle:
Condition Outdoor
fan
Compressor
Room temperature down T2≤-1°C Off Off
Room temperature up T2≥10°C On On
10.1.3.3 The restart of the compressor shall execute the delay protection.
10.1.4 Condenser high temperature protection
10.1.4.1 Only available to cooling and dehumidifying mode.
10.1.4.2 Action condition
Condition Compressor
Room temperature up Condenser temp.≥65°C Off
Room temperature down Condenser temp.<60°C On
10.1.5 Outdoor protection
When outdoor protection signal is high level, outdoor unit will perform protection: the
whole machine will be shut down while the indoor unit will indicate the corresponding
protection signal.
The A/C will recover if outdoor protection signal is low level.
10.1.6 Air outlet of indoor unit high temperature protection
When the temperature of air outlet of indoor unit is up to 70°C, protection signal is high
level, then the unit will perform protection : electric heaters will be shut down at once,
indoor fan speed will be high and four-way valve, compressor and outdoor fan are shut
down.
The A/C will recover if the temperature of air outlet of indoor unit is down to 55°C.
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10.2 Self-diagnosis
Codes Contents
E01 The temp. sensor is off, or short-circuit.
E02 Compressor is over current
E04 Outdoor unit protection
P02 Compressor is over load
P03 The temperature of evaporator coil of indoor unit is too low (when cooling)
P04 The temperature of evap ionrdaotoorr uconiilt oisf too high (when heating)
P05 The temperature of air outlet of indoor unit is too high (when heating)
10.3 LEDs for the indication of outdoor trouble
In normal operation, LEDs emit no light and they will flash at a frequency of 2Hz when
trouble occurs. Their codes are listed in the following table:
Type Contents LED1 LED2 LED3 Indication
Trouble Phase sequence or Lack of phase(A ,B) Flash Off Off E04
Trouble Lack of phase(C) Off Off Off E04
Trouble Protection of low pressure Flash Flash Off E04
Trouble Overload of current Off Off Flash E04
Trouble Communication failure Flash Off Flash E04
Trouble Open-circuit or short-circuit trouble of T3 Off Flash Flash E04
Trouble Open-circuit or short-circuit trouble of T4 Off Flash Off E04
Trouble Condenser high temperature protection Flash Flash Flash E04
Note: When the machine stands by ,LED1- LED3 flashs in low speed.
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10.4 Troubles and Solutions
Before calling for service, please review the following list of common problems and
solutions.
Problem Possible Cause Solutions
Unit Idleness No electric power supply Wait for power recovery
Power Switch turned off Turn on the switch
Fuse blew Replace the fuse
Air flow but poor
cooling (heating)
Improper temperature setting Readjust the temp. to a
lower degree. See
‘OPERATIONS’ for details
The air -filter blocked Clean the air- filter
Air inlet/outlet blocked Clear the air inlet/outlet
Windows/door are open Close windows/door
Air flow but no
cooling (heating)
The air inlet/outlet of indoor/outdoor
unit are blocked up by something
Remove the obstacles
which blocks the air
inlet/outlet
Too much dust or dirt on the air-
filter
Clean the air-filter
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The display board may show some types of the unit’ s failures when it happened.
Number Display
code
Problems What to do
1 E01 The temp. sensor is off, or short-circuit. Contact service people
2 E02 Compressor is over current Turn off the unit, wait for a
moment and then restart. If
many times of this operation do
not work, please contact service
people.
3 E04 Outdoor unit protection Turn off the unit, wait for a
moment and then restart. If
many times of this operation do
not work, please contact service
people.
4 P02 Compressor is over load Turn off the unit, wait for a
moment and then restart. If
many times of this operation do
not work, please contact service
people.
5 P03 The temperature of evaporator coil of
indoor unit is too low (when cooling)
Turn off the unit, remove the
obstacles in the air-inlet and
clean the air filter, then restart
the unit. If many times of this
operation do not work, please
contact service people.
6 P04 The temperature of evaporator coil of
indoor unit is too high (when heating)
Turn off the unit, remove the
obstacles in the air-inlet and
clean the air filter, then restart
the unit. If many times of this
operation do not work, please
contact service people.
7 P05 The temperature of air outlet of indoor
unit is too high (when heating)
Turn off the unit, remove the
obstacles in the air-inlet and
clean the air filter, then restart
the unit. If many times of this
operation do not work, please
contact service people.
If the above procedures still do not work, please contact our local dealers or after sales
service people, inform them your air conditioner model and trouble details, they will help
you solve the problem. Please do not repair the air conditioner by yourself.
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NOTE:
It is not a failure if :
1. The air smells because of feculent room air.
2. The refrigerant running noise is heard when the unit starts to run;
3. A ‘Pee-pa’ voice is heard when the unit starts or stops running.
4. There is maybe drop of water on the surface of the indoor unit when air humidity is
over 85%.
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