Omega OTEC IEWH Series User manual

High Wall Inverter
Service Manual
IEWH/ICHH Series
220-240V/1/50Hz

Service Manual
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CONTENTS
1. SAFETY INSTRUCTIONS
Symbol Description…………………………………………………..……….………..….2
Installation Instruction…………………………………………………..…….……….…. 2
Operating Instruction………………………………………………………….……….…..3
Safety Instruction… …………………………………………………………..……….… 6
2.SERVICE AND MAINTENANCE
Clean the Front Panel and Remote Controller………………………….……………….13
Clean Air Filter…………………..………………………………………….………….……13
No Use for Long Time…………………..…………………………………….…………....14
Recommendations for Energy Saving…………..……………………………….……..…15
3.TROUBLESHOOTING
Air Conditioner is in Error……………………………………………………….………….16
Remote Controller is in Error…………………………………..……………….……….…16
4.NORMAL PHENOMENONS……………………………………….…………………..17

GENERAL SAFETY PRECAUTION
WARNING
SAFETY RULES AND RECOMMENDATIONS FOR INSTALLATION
 The installation must be entrusted by the dealer or an authorized technician as it requires special knowledge and skills.
If you install the unit yourself, there is a risk of fire, electric shock, injury, or water leakage.
 Make sure the base of the outdoor unit is securely fastened.
 Make sure that air cannot enter the refrigerated system and check for refrigerant leakage by moving the unit.
 The fuses installed in the integrated control are 3.15A / 250V for 220V and 3.15A / 125V for 110V.
The user must protect the wall unit with a fuse of sufficient capacity for the maximum power current or other overvoltage
protection device.
 It is necessary to incorporate in the fixed wiring a device for disconnecting the power supply, the distance between the
contacts must be at least 3 mm between each pole.
 The appliance must be installed according to the regional standards in force.
 The device must be installed according to national wiring regulations.
 Make sure that the main voltage corresponds to the one indicated on the identification plate.
 You may be shocked even if you turn off the power.
 Keep the switch or plug clean.
 Insert the plug correctly into the socket, avoiding the risk of electric shock or fire due to insufficient contact.
 You must use an independent electrical outlet to connect the unit. If you use another electrical outlet, a fire may occur.
 Check that the male and female plugs are compatible, if not pls proceed to change them.
 Do not install the appliance at a distance of less than 50 cm from flammable substances (alcohol, etc.) or pressurized
containers (aerosol cans).
 If the unit is used inlocations where ventilation is not available, care must be taken to prevent refrigerant leakage, which
could result in a fire hazard.
 Avoid installing the unit in a location where flammable gas leaks may occur. A fire could start in case of gas leakage or
gas accumulation around the unit.
 Do not install it in an excessively humid place, such as in a bathroom. Deterioration of the insulation may result in
electric shock or fire.
 Before accessing the connection terminals, all power circuits must be disconnected from the power source.
 Grounding must be done by the dealer or an authorized technician. Insufficient or incorrect grounding may cause a fire.
 It is highly recommended to Perform an operation test after installing the air conditioner and save the operation data.
 It is strongly recommended to read the instructions carefully before using your device.
 Use the air conditioner as specified in this guide. These instructions are not intended to cover all conditions and
situations. As with any home appliance products, common sense and caution are recommended for installation, use
and maintenance.
 Packaging materials are recyclable and should be throw in appropriate containers. The air conditioner must also be
throwed in a recycling center when it is condemned.
 The manufacturer declines all responsibility for damage caused by non-observance of the safety instructions in this user
manual.
 Power supply: The electrical installation must comply with local electrical standard, especially for grounding.
We cannot be held responsible for any incident caused by improper electrical installation.
 Electrical installation advices:
- Do not use an extension cord, adapter or power strip
- Make sure the power plug has the ground wire
- The socket must be easily accessible but out of reach of children

SAFETY RULES AND RECOMMENDATIONS FOR USE
PROHIBITION
 Never switch on or off the circuit breaker or touch the buttons with wet hands. You may be shocked.
 Do not insert your fingers or other objects into the air inlet / outlet grilles.
 Do not insert any object or liquid (metal object, piece of paper, water, etc.) into the air inlet or outlet grille. The internal
blower (which can rotate at high speed) or the high voltage sections can cause injury or electric shock.
 Do not clean the inside of the air conditioner yourself. Ask your dealer to clean the air conditioner internally. Improper
cleaning can result in breakage of resin parts or deterioration of the insulation of electrical components, which may
result in water leakage, electric shock or fire.
 Do not place heavy objects on the power cable, expose it to heat, or pull on it. Otherwise, there is a risk of electric shock
or fire.
 Do not use any other refrigerant than the one specified. Otherwise, abnormally high pressure may occur in the
refrigeration cycle, which can lead to product malfunction, explosion or even personal injury.
 Do not bend, pull or crush the power cord as this may damage it.
 Electric shocks and fires are usually caused by a damaged power cord. Only a qualified technician should replace a
damaged power cord.
 Do not use an extension cord or multiple plug.
 Do not touch the device if parts of your body are humid or wet.
 Do not obstruct the air inlet or outlet of the wall unit or outdoor unit.
 Clogging of these openings could cause a decrease in the efficiency of the air conditioner with the possibility of
subsequent failures.
 Do not alter the characteristics of the device in any way.
 Do not install the unit in an environment that may contain gasoline, oil, or sulfur or near a heat source.
 Do not climb, do not place heavy or hot objects on the top of the unit.
 Do not leave doors or windows open for extended periods while the air conditioner is running.
 Do not direct the air flow onto plants or animals.
 Prolonged direct exposure to the cold air conditioner could have a negative effect on plants or animals.
 Do not put the air conditioner in contact with water. Electrical insulation could be damaged and cause a risk of electric
shock.
 Do not climb or place objects on the outdoor unit.
 Never insert a stick or similar object into the outdoor unit. You could be seriously injured.
WARNING
 The manufacturer declines all responsibilityfor damage caused bynon-observance of thesafetyinstructions inthis user
manual.
 Be careful not to install, repair, open or remove the cabinet. You may be exposed to dangerous voltages. Ask the dealer
or a professional to do so.
 Always use the air conditioner with the air filter in place. Use without the air filter could cause excessive accumulation
of dust and other residues on the internal components resulting in subsequent failures.
 The fins should be down in heating mode and up in cooling mode.
 Selecting the most appropriate temperature may prevent damage to the unit.
 Do not expose your body directly to cold or hot air for a long time.
 In the event of a malfunction (burning smell, etc.), switch off the air conditioner and switch off the circuit breaker.
 Be careful not to disassemble, modify or move the device yourself. You may cause a fire, electric shock, or waterleak.
If the cables are damaged, there is a risk of electric shock or fire. Always contact your dealer to repair or move the unit,
 If a malfunction occurs (especially if there is a burning smell from the unit or the unit is no longer cooling), immediately
stop using the unit and turn off the circuit breaker. If you continue to use the product under these conditions, you may
be subjected to electric shock or fire. Always contact your dealer to repair or have the device inspected,
 Do not connect the ground wire to a gas pipe, water pipe, lightning rod or to the telephone earth line.
 If the drain hose of the indoor unit is exposed due to moving the unit, close the opening.
 Do not touch the internal electrical components as this may result in electric shock or injury.
 If the air conditioner does not cool or heat up, it is possible that refrigerant leakage has occurred. Contact your dealer.
The refrigerant used in the air conditioner is well protected. It will not leak under normal conditions of use. Nevertheless,
if a leak occurs and the fluid comes into contact with a heat source, especially with a radiator or a range, a harmful
reaction can take place.

 Observe the (+) and (-) polarities when inserting the batteries.
 Do not recharge the batteries.
 Do not use batteries whose recommended period of use has expired.
 Be sure to remove used batteries from the remote control.
 Do not use batteries of different types at the same time and do not use new batteries with used batteries.
 Do not solder the batteries.
 Be careful not to short-circuit, disassemble, heat, or burn batteries. If the batteries are discarded incorrectly, they may
explode or leak, possibly resulting in burns or injury.
 If yourskin comes into contact with thebatteryfluid, rinse immediatelywith plenty of water. If liquidis flowing on devices,
wipe it to prevent direct contact.
 Keep batteries out of reach of young children. If a child swallows a battery, consult a doctor immediately.
 In case of unusual noises, stop using the device immediately and switch off the circuit breaker. If you continue to use
the product under these conditions, it may cause a fire or electric shock. Contact your dealer for service.
 Be careful not to damage or modify the power cable. Be sure to connect the cable correctly and do not use a multi-plug
where other devices are connected. Otherwise, a fire may occur.
 This device is not intended to be used by persons (including children) with reduced physical or mental abilities.
 Children must be supervised so that they do not play with the device.
 Check that the circuit breaker is correctly installed. Failure to install the circuit breaker properly may result in electric
shock. To check the installation method, contact your dealer or the authorized service technician who installed the unit.
 If you use the appliance in a closed room or with other combustion appliances, ventilate the room regularly by opening
a window. Insufficient ventilation may result in asphyxiation due to a lack of oxygen.
 Avoid using the device for a long time in an excessively humid environment (where the humidity is above 80%),
especially when windows and doors are left open. Condensation may be formed in the indoor unit and water may flow
on your furniture, which may damage the unit.
 In case of prolonged disuse, turn off the switch or disconnect the main circuit breaker.
 It is recommended to entrust the maintenance of the device to a specialist in case of prolonged use.
 At least once a year, check if the mounting table of the outdoor unit is damaged. If you do not perform this check and
the table is damaged, the unit may fall and injure someone.
 Use a stable and sturdy ladder to install / remove the front panel / air filter. Otherwise, you risk to fall and injure yourself.
 Do not hang on the outdoor unit and do not place any object on it. This may indeed tip over or fall, and you could hurt
yourself. Damage to the unit may cause electric shock or fire.
 Do not usecombustion equipmentdirectlyinthe airflowof the air conditioner. Poor combustion canlead to asphyxiation.
 Check that the water is properly drained. If the exhaust system is clogged, leakage may occur and water may damage
your furniture. To verify that the installation method used is correct, contact your dealer or the authorized service
technician who installed the unit.
 Do not place any containers filled with liquids, such as vases, on the apparatus. Otherwise, the liquid in the container
may get inside the unit and damage the electrical insulator, which may cause an electric shock.
 Do not place any other electrical appliance or furniture under the unit. Drops of water could fall on them, which could
damage the furniture or the appliance.
 Be careful not to place animals or plants directly in the airflow of the air conditioner. This can affect the health of the
animals or plants.
 Do not place objects near the outdoor unit and regularly clean dead leaves that fall around. Dead leaves attract small
animals, which can come into contact with the electrical components of the appliance, which may cause a malfunction
or fire.
 Do not use the appliance for other purposes than the one designed, such as for storing food or animals, or as a support
for plants, precision appliances or art works. Do not use the unit in a boat or other vehicle as this may cause the unit to
malfunction or damage the vehicle. When you clean it, you must turn off the power and turn off the breaker. Since the
internal blower can turn at high speed, you could hurt yourself.
Do not clean the main unit with water as this may cause an electric shock.
 After cleaning the front panel or air filter, carefully wipe off any splashing water and let it dry. The presence of water
may cause an electric shock.
 After removing the front panel, do not touch the metal parts of the unit. You could hurt yourself.
 Do not touch the air intake section or aluminum fins of the unit. You could hurt yourself.
If thunder rumbles and lightning announces a thunderstorm, stop using the device and turn off the breaker.
Lightning may cause a malfunction.
BATTERY REMOTE CONTROL

SAFETY PRECAUTIONS
WARNING: Following these basic precautions will reduce the
risk of fire, electrical shock, injury or death when using your
air conditioner.
1. Air conditioner must be connected to proper electrical outlet or breaker with the correct
electrical supply. And only the specified power can be used.
2. Proper grounding must be ensured to reduce the risk of shock and fire
DO NOT CUT OR REMOVE THE GROUNDING PRONG. If you do not have a
three-prong electric receptacle outlet or breaker in the wall, have a certified electrician
install the proper receptacle or breaker. The wall receptacle or breaker MUST be properly
grounded.
3. DO NOT use if power cord is frayed or otherwise damaged. Also avoid using it if there
are cracks or abrasion damage along the length, plug or connector.
4. DO NOT USE AN ADAPTER ORAN EXTENSION CORD.
5. DO NOT block airflow inside or outside the air conditioner with blinds, drapes, protective
covers, shrubs or blusher.
6. Be careful of sharp edges on the front and rear fins of the unit that could cut and cause
serious injury.
7. Be careful when lifting the air conditioner to install or remove the unit. Always use two or
more people for this.
8. Always cut off the power of air conditioner before servicing it or moving it.
9.In some type of units, there is no appropriate plug corresponding to its power cord
because of power, Under this condition, an appropriate power breaker should be
linked to its power cord, therefore, the instruction part associated with plug using is not
available for these types.
10. An all-pole disconnection switch having a contact separation of at least 3mm in all
poles should be connected in fixed wiring.
11. The appliance shall be installed in accordance with national wiring regulations.
12. This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge, unless
they have been given supervision or instruction concerning use of the appliance by a
person responsible for their safety. Children should be supervised to ensure that they
do not play with the appliance.

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SAFETY INSTRUCTIONS
〖Symbol Description〗
Asymbol indicating operation which may cause personnel
casualties or serious damages.
Warning:
Caution: Asymbol indicating operation which may cause personnel
casualties or property damages.
〖Installation Instruction〗
Improper connection may decrease the
efficiency or cause air conditioner stop
running. Water or refrigerant leakage may
be resulted as well.
Proper connection o
f
wires and piping
Make sure that the capacity of socket o
r
breaker and power cable is sufficient, the
voltage is correct and the socket o
r
breaker is grounded. There may be hazard
of fire or electric shock otherwise.
Power specifications
Installation environments
Do not install air conditioner at the place
where there is flammable or corrosive air.
Please confirm the following before installation
Operating instruction
Please operate air conditioner in
accordance to this manual.
Caution

Never install by yourself.
Split type air conditioner will work for you for a long period of time if it is correctly installed.
Improper installation could cause problems such as leakage of water or refrigerant, electric
shock or fire.
Warning
If the power cable to the unit is disconnected, burnt, chipped, or detached from the terminal , to
make reparations, please contact the nearest service center, or repaired by people who have the
same
q
ualifications or ex
p
erience to avoid electrical hazards.

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〖Operating Instruction〗
Electrical safety
Grounding: This room air conditioner must be grounded.
Grounding reduces the risk of electric shock by providing an escape wire for the
electric current.
If the power cord has a grounding plug with a grounding wire, plug it into an outlet
that is properly installed and grounded.
If the power cord has not a grounding plug with a grounding wire ,the grounding wire
must connect the breaker that is properly installed and grounded.
Warning: Improper use of the grounding plug or breaker can result in a risk of electric shock.
Call a qualified electrician if you don’t understand the grounding instructions or if you
are not sure if the air conditioner is properly grounded. If the wall outlet or breaker
is not grounded, please contact an electrician to have it replaced with a properly
grounded outlet or breaker.
Do not, under any circumstances, cut or remove the third (ground) prong from
the power cord.
Adapter plug: We strongly advise against using an adapter plug or breaker.
Operating conditions
1. Temperature:T1 instance: -7℃~45℃(16℃~45℃in cooling-only type)
T3instance:-7℃~52℃(16℃~52℃in cooling-only type)
If the unit runs beyond the temperature for a long time, it may cause cooling capacity to
decrease or protector to work.
2. Relative humidity: <80%
If the unit runs beyond the humidity range, condensate may be formed near blade and outlet of
air conditioner. It’ s normal.
WARNINGS
Following the safety messages is very important. These messages can save
you from being injured or killed. Warning symbols alert you to be careful and
means danger. Always follow instructions to be safe and reduce chances of
injury or death. Warning and danger signs will precede safety messages.

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3. In heating operation, strange smell may come from the unit. It is Normal phenomenon.
4. The performance parameters refer to name plate.
5. The waterproof level of indoor unit is IPX0. Do not use it in the laundry or bathroom.
6. The outdoor unit can’ t be installed in a closed area.
Tips
Install the unit on the north side, as normally that is the shaded side. This will
enhance the operation of your unit.
Use correct electric voltage and proper ampere for the unit to run effectively.
Only let a certified electrician do any modifications to your electrical outlet or
breaker.
Use a dedicated line for the operation of your air conditioner to avoid the
possibility of an electrical surge.
If the supply cord is damaged, it must be replaced by the manufacturer or its
service agent or a similarly qualified person in order to avoid a hazard.
The dimensions of the space necessary for correct installation of the appliance
including the minimum permissible distances to adjacent structures.
The appliance shall be installed in accordance with national wiring regulations.
Disconnect the power supply before cleaning and maintenance.
If the appliance is not connected by plug，an all-pole disconnection device which
has at least 3mm separation distance in all pole and a residual current
device(RCD)with the rating of above 10mA shall be incorporated in the fixed
wiring according to the national rule.
If the appliance is connected by plug，it must be positioned so that the plug is
accessible.
Energy Saving Guide
When installing your air conditioner make sure to seal all areas where there is a
possibility of air leakage.
Airflow should not be blocked inside either by curtains, drapes or furniture or
outside by shrubs or bushes.
Do not needlessly use an electrical light or other appliances that produce heat.
Keep the blinds and the drapes drawn on all the other window.
While cooking use an exhaust fan in the kitchen to remove the excess heat
produced.

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〖Operating Instruction〗
Only single-phase a.c. power can be used.
please refer to nameplate for details.
Use the specified power cord; do not
change it.
Do not put fingers or sticks into the inlet or
outlet of air conditioner; the running fan may
cause injuries.
Do not put anything on the outdoor unit.
Do not switch on or off the unit by plugging or
pulling off the plug, or by switching on or off
the breaker .
Keep indoor ventilated, especially when
there is operating gas equipment.
Do not substitute fuse with lead wire or other
materials. Pull off power plug or switch off breaker if
the air conditioner is not used for a long
time.

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〖Safety Instruction〗
Don not connect the earth line to gas pipe,
water pipe. Improper grounding may cause
electric shock.
Do not pull off the power plug or switch off
the breaker when it is in operation.
Switch off the unit; cut off the power source
and contact service agent if there is abnormal
phenomenon (e.g. burning smell comes out).
Do not install air conditioner at the place
where flammable gas may leak.
Do not place plants or animals directly in the
path of the air conditioner’ s airflow. Doing so
could harm them.
Please contact service agents for service.
Improper service may cause accident.
Switch off the unit, cut off the power source
and make sure the fan stops before cleaning
the unit.
For removal and installation of air
conditioner, please refer to professionals
or contact service agents.
Warning:
The appliance is not intend for use by young children or infirm
persons without supervision.
Young children should be supervised to ensure that they do not play
with the appliance.
If the supply cord is damaged, it must be replaced by the manufacturer
or its service agent or a similarly qualified person in order to avoid a
hazard.

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SERVICE AND MAINTENANCE
Careful maintenance and overhaul in advance can prolong the air conditioner’ s service life and save
electricity charges.
Caution:
1. Stop air conditioner by remote controller and pull off the plug before
service and maintenance.
2. Do not stand on unstable objects when you clean or service air
conditioner, or it may cause personnel injury.
3. Do not touch the metal part of the body when you remove the front
panel, or it may cause personnel injury.
〖Clean the Front Panel and Remote Controller〗
If the dirt can’ t be removed, please clean it with warm damp cloth (soaked with warm water below 40℃)
Caution:
1. Do not clean the unit with water, or it may cause electric shock.
2. Do not clean the remote controller with water.
3. Do not clean with alcohol, gasoline, banana oil, or polishing.
4. Do not clean the unit violently, or it may cause the front panel
falling down.
5. Do not clean the front panel or remote controller with metal
brush; it may damage the surface.
〖Clean Air Filter〗
1. Open the front panel.（Fig.4）
2. Lift the protruding part, then pull it downward,
remove the air filter.
3. Clean it with vacuum cleaner or water. If air filter is
very dirt, please clean it with warm soapy water
or mild detergent. Then dry it in the shadow.
4. Insert air filter into the previous position, and close
the front panel.
Note:
1. Air filter should be cleaned at least once every two weeks, or heating or cooling capacity will be reduced.
2. Do not clean the air filter with metal brush; it may be damaged.
Fig. 4

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〖No Use for Long Time〗
1. Swing 3-4 hours to dry the internal 2. Stop operation by remote controller, then
air conditioner. cut off the power source of air conditioner.
3.Maintainairfilternet. 4.Takeoutbatteriesfromremotecontroller.

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〖Recommendations for Energy Saving 〗
Appropriate Temp Setting
It is harmful to health if the room is too cold.
Avoid Direct Sunlight
When it is cooling, please use curtain or
blind to obstruct direct sunlight.
Avoid Heat Sources
When it is cooling, using other heat sources
may affect cooling effect.
Close Doors and Windows
Incoming outdoor air will affect the cooling
or heating efficiency.
Keep Air Filter Clean
Keeping air filter clean ensures high
efficiency operation.
Good Ventilation
Do not put objects in front of the inlet and
outlet of outdoor unit.

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TROUBLE SHOOTING
〖Air Conditioner is in Error〗
Checking before service.
Phenomenon Checking Items
Air Conditioner Does
Not Operate At All
1. Check whether the power is disconnected.
2. Check whether the breaker is switched on or the fuse is burnt.
3. Check the remote controller batteries.
4. Check whether radio equipment is used within 1m around the unit.
Poor Cooling or
Heating Performance
1. Check whether the air inlet or outlet is blocked.
2. Check whether dust is blocking the filter.
3. There may be too many people indoors.
4. Check whether doors or windows are closed.
5. Check whether fan speed or set temperature is improper.
〖Remote Controller is in Error〗
The following “trouble shooting” is normal phenomenon
Phenomenon Checking Items
Fan stops or fan
speed can not be
controlled.
1. When air conditioner is in DRY mode or SLEEP mode, fan speed can’
t be controlled sometimes.
2. When air conditioner is in COOLAIRFLOW PROOF or DEFROSTING
operation (in HEAT mode), fan motor will stop.
3. When air conditioner is in COOL or DRY mode, if air conditioner
enters freeze-prevention operation, then fan speed can not be
controlled.
4. When air conditioner is in HEAT mode, if air conditioner enters
heating overload prevention operation, then fan speed can not be
controlled.

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NORMAL PHENOMENONS
When it is heating or cooling, plastic
substance may give out a sound because of
the temperature change.
If the indoor humidity is too high, water
drops may form on the front grill of indoor
unit. This is a normal phenomenon.
There may be gentle “rustle” sound when the
unit starts or stops. It is the normal sound of
flowing refrigerant.
Walls, carpet, furniture or clothes indoors
may disseminate peculiar smell.
In order to protect the unit, when the compressor
stops, there will be a 3-minute delay before
restarting.
In the first several minutes of heating
operation, wind may not come out from the
indoor unit.
Water may flow out from the outdoor unit during
heating operation. In heating operation, steam may come out
when it is defrosting.

OMEGA IEWH(CHH) - High Wall Inverter Service Manual
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IEWH(CHH)I3A-SM1C0622
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