Hitachi RAS-35YH6, RAC-35YH6 User Manual

FOR SERVICE PERSONNEL ONLY

32mm

20mm

330

310

(10)10

500

125

450mm

400mm 316mm

125mm

41mm

45mm

ø65mm

199mm

280mm

65mm

390mm

80mm

530mm 780mm

10mm

45mm

ø65mm

42mm

44mm

125mm

20mm

™

SAFETY PRECAUTION

• Read the safety precautions carefully before operating the unit.

• The contents of this section are vital to ensure safety. Please pay special attention to the following sign.

WARNING .......... Incorrect methods of installation may cause death or serious injury.

CAUTION .......... Improper installation may result in serious consequence.

Make sure to connect earth line.

This sign in the figures indicates prohibition.

Be sure that the unit operates in proper condition after installation. Explain to customer the proper operation and maintenance of the unit as described in the user' s guide. Ask a customer to keep this installation manual together with the instruction manual.

WARNING

• Please request your sales agent or qualified technician to install your unit. Water leakage, short circuit or fire may occur if you do the installation work yourself.

• Please observe the installation stated in the installation manual during the process of installation. Improper installation may cause water leakage, electric shock and fire.

• Make sure that the units are mounted at locations which are able to provide full support to the weight of the units. If not, the units may collapse and impose danger.

• Observe the rules and regulations of the electrical installation and the methods described in the installation manual when dealing with the electrical work. Use cables which are approved official in your country. Be sure to use the specified circuit. A short circuit and fire may occur due to the use of low quality wire or improper work.

• Be sure to use the specified cables for connecting the indoor and outdoor units. Please ensure that the connections are tight after the conductors of the wire are inserted into the terminals to prevent the external force is being applied to the connection section of the terminal base. Improper insertion and loose contact may cause over-heating and fire.

• Please use the specified components for installation work. Otherwise, the unit may collapse or water leakage, electric shock, fire or stronger vibration may occur.

• Be sure to use the specified piping set for R410A. Otherwise, this may result in broken copper pipes or faults.

• When installing or transferring an air conditioner to another location, make sure that air other than the specified refrigerant (R410A) does not enter the refrigeration cycle. If other air should enter, the pressure level of the refrigeration cycle may increase abnormally which could result in a rupture and injury.

• Be sure to ventilate fully if a refrigerant gas leak while at work. If the refrigerant gas comes into contact with fire, a poisonous gas may occur.

• After completion of installation work, check to make sure that there is no refrigeration gas leakage. If the refrigerant gas leaks into the room, coming into contact with fire in the fan-driven heater, space heater, etc., a poisonous gas may occur.

• Unauthorized modifications to the air conditioner may be dangerous. If a breakdown occurs please call a qualified air conditioner technician or electrician. Improper repairs may result in water leakage, electric shock and fire, etc.

• Be sure to connect the earth line from the power supply wire to the outdoor unit and between the outdoor and indoor unit. Do not connect the earth line to the gas tube, water pipe, lighting rod or the earth line of the telephone unit. Improper earthing may cause electric shocks.

• When finishing the refrigerant collection (pumping down), stop the compressor and then remove the coolant pipe. If you remove the refrigerant pipe while the compressor is operating and the service valve is released, air is sucked and a pressure in the freezing cycle system will build up steeply, causing an explosion or injury.

• When installing the unit, be sure to install the refrigerant pipe before starting the compressor. If the refrigerant pipe is not installed and the compressor is operated with the service valve released, air is sucked and the pressure level of the refrigeration cycle may increase abnormally which could result in a rupture and injury.

CAUTION

• A circuit breaker must be installed in the house distribution box for the direct connected power supply cables to the outdoor unit. In case of other installations a main switch with a contact gap or more than 3mm has to be installed. Without a circuit breaker, the danger of electric shock exists.

• Do not install the unit near a location where there is flammable gas. The outdoor unit may catch fire if flammable gas leaks around it.

• Please ensure smooth flow of water when installing the drain hose. Improper installing may wet your funiture.

• An IEC approved power cord should be used. Power cord type: NYM.

THE CHOICE OF MOUNTING SITE (Please note the following matters and obtain permission from customer before installation.)

WARNING

• The unit should be mounted at stable, non-vibratory location which can provide full support to the unit.

• The Outdoor unit must be mounted at a location which can support heavy weight. Otherwise, noise and vibration will increase.

WARNING

CAUTION

• No nearby heat source and no obstruction near the air outlet is allowed.

• The clearance distances from top, right and left are specified in figure below.

• The location must be convenient for water drainage and pipe connection with the Outdoor unit.

INDOOR UNIT

• To avoid interference from noise, please place the unit and its remote controller at least 1m from the radio and television.

• To avoid any error in signal transmission from the remote controller, please put the controller far away from highfrequency machines and high-power wireless systems.

Names of Indoor Components

No. Item Qty

Hanger

Screw for Hanger

(4.1 x 32)

Holder for Remote Controller

AAA size Battery

The Length of Indoor Unit

Connecting Cord

above

0.9 m

When the power is supplied from the indoor unit, pull the power cable from the cable drawer at the right or left side of the indoor unit.

Cable drawer (right side)

Direction of Piping

Backward piping from left

Screw for holder of Remote Controller

(3.1 x 16)

Holder

Remote Controller

Connection

There are 6 directions allowed, namely, backward piping, backward piping from left,

horizontally piping from right, horizontally piping from left, vertically down from right, vertically down from left.

Dimension of Mounting

Insulation sheet

Stand of the Outdoor unit

(unit : mm)

Bush

Drain Pipe

Switch Cover

Purifying Filter

The components of 9 & 0 are included in the package of the outdoor unit.

above 100mm

above 300mm

above

1.6 m

Mounting Stand

above 50 mm when installed on the ceiling of balcony

• Do not expose the unit under direct sunshine or rain. Besides, ventilation must be good and clear of obstruction.

• The air blown out of the unit should not point directly to animals or plants.

• The clearances of the unit from top, left, right and front are specified in figure below. At least two of the above sides must be open air.

• The installation height should be at least 2,300 mm or more

OUTDOOR UNIT

from the floor.

• Be sure that the hot air blown out of the unit and noise do not disturb the neighbourhood.

• Do not install at a location where there is flammable gas, steam, oil and smoke.

• The location must be convenient for water drainage.

• Place the Outdoor unit and its connecting cord at least 1 m away from the antenna or signal line of television, radio or telephone. This is to avoid noise interference.

Figure showing the Installation of Indoor and Outdoor Unit.

above 50mm

Be sure to completely seal any gap with putty.

about 0.45m

must not bend

about 300mm

Maximum pipe length 20m

above 200mm

CAUTION

Used in horizontal piping

above 50mm

give clearance as wide as possible

above

200mm

above 50mm

2,300 mm or more

Plug (Procure locally)

The indoor piping should be insulated with the enclosed insulation pipe. (If the insulator is insufficient, please use commercial products.)

• The refrigerating machine oil is easily affected by moisture. Use caution to prevent water from entering the cycle.

• The difference in height between the indoor and outdoor unit should be kept below 10m.

• The connecting pipe, no matter big or small, should all be insulated with insulation pipe and then wrapped with vinyl tape. (The insulator will deteriorate if it is not wrapped with tape).

The connection of insulated drain hose. Inner diameter 16mm

Please use insulated drain hose for the indoor piping (commercial product)

1 Installation of Hanger, Wall Penetration and Installation of Protection Pipe

• The draining of the water container inside the Indoor unit can be done from the left. Therefore the hanger must be fixed horizontally or slightly tilted towards the side of drain hose. Otherwise, condensed water may overflow the water container.

Direct Mounting On The Wall

• Please use hidden beams in the wall to hold the hanger.

Visible outline of the outdoor unit

Drain Hose

Procedures of Installation and Precautions

• Procedures to fix the hanger.

1.Drill holes on wall. (As shown below)

Wall

INDOOR UNIT

• Procedures to fix the holder of remote control.

1.Drill holes on wall. (As shown below)

Wall

Wall Penetration and Installation of Protection Pipe

• Drill a ø65mm hole on wall which is slightly tilted towards the outdoor side. Drill the wall at a small angle.

• Cut the protection pipe according to the wall thickness.

• Empty gap in the sleeve of protection pipe should be completely sealed with putty to avoid dripping of rain water into the room.

• Please ensure smooth flow of water when installing the drain hose. Improper installing may wet your funiture.

• An IEC approved power cord should be used. Power cord type: NYM.

06K108_RAS-35_YH6_English.p65 11/13/06, 3:02 PM1

ø4.8mm

ø4.4mm

Line

Level

Weight

CAUTION

2 Screw for Hanger

Hanger

Wall hole

2.Push plug into the holes. (As shown below)

1 Hanger

2 Screw

Wall

2.Push plug into the holes. (As shown below)

3 Remote

Control Holder

Indoor

Seal with putty

Protection pipe

Wall hole

Drain Hose

Screw the hanger at the positions possibly near the upper and lower hooks where the indoor unit is hung. Use 4 or more screws to fix the hanger.

3.Fix the hanger on wall with

Plug (Procure locally)

above 50mm

5 Screw

Plug (Procure locally)

Outdoor

Seal with putty

WALL

Sleeve of protection pipe

4.1 x 32 screw. (As shown in figure below)

Ceiling

4.1 x 32 screw

WARNING

2-5mm

Be sure that the wire is not in contact with any metal in the wall. Please use the protection pipe as wire passing through the hollow part of the wall so as to prevent the possibility of damaged by mouse. Unless it seals completely, any air with high humidity flows from outdoor and any dew may drop.

2 Installation Of The Indoor Unit

INSTALLATION AFTER CONNECTION OF REFRIGERATING PIPES

• The refrigerating pipe should be adjusted to fit into

Cutting Low Cover bush

• While installing the pipe from the right, left or bottom side, use a knife to cut openings as

• The terminals of 2 connected pipes must be covered shown in figure. Then smoothen the edges of openings with a file.

• Connect the connecting cord after removing low

• After adjustment, fit the connecting cord and pipes

PIPING FROM THE RIGHT SIDE (BACKWARD, DOWNWARD, HORIZONTAL)

Openings

Preparation

• Connect connecting cord.

• Holder can be attached at the either of 2 places.

• Pull out the pipe, connecting cord and drain hose.

Installation

• Insert the pipe through the wall hole. ¡ The upper part of the Indoor unit is hanged on the

hanger.

™ The projection at the lower part of the Indoor unit is

hooked onto the hanger.

Hanger

Refrigerating Pipe

Protection Pipe

™

PIPING FROM THE LEFT SIDE (BACKWARD, DOWNWARD, HORIZONTAL)

Drain Hose

Connecting Cord

Lift the body of the unit upwards and then force it downwards.

Hanger

Projection

Preparation

Connecting cords, pipe and drain hose must be laid together with Vinyl tape.

Wall hole

Pipe

Cable

Drain layout of backward piping

Drain hose

THE CONNECTION OF REFRIGERATING PIPE DURING THE INSTALLATION OF INDOOR UNIT

Preparation To Install Refrigerating Pipes

• The refrigerating pipes and connecting cord

Installation

Hang the indoor unit onto the hanger. Use the temporary stand at the back of the Indoor unit to push its lower part 15cm forwards.

• Place the drain hose through the hole on the wall.

• Wrap the refrigerating pipes with insulation pipe after

• Connect the connecting cord after removing low cover.

Changed of Drain Hose and Installation Procedures.

•

Exchange the location of drain hose and drain cap while installing the pipe from the left side as

• After adjustment, the connecting cord and refrigerating pipes shown in below. Be sure to plug in the drain hose until the insulating material folds upon itself.

• The projection of Indoor unit must hook to the hanger.

• Please use pliers to pull out the drain cap. (This is an easier way to remove the drain cap).

CAUTION

Insufficient insert may result in water leakage.

Rib at the Indoor unit

Pipe

Cable

Drain layout of backward piping from left

• The connected terminals should be completed sealed

Drain cap

Drain Hose

•

Remove low cover

•

Insert drain cap up to the location securely till the cap stops.

CAUTION

Insulating section of the

•

Push the pipe deeply until the insulating section of the drain hose end gets over the rib at the indoor unit side.

drain hose end

• Do not tie the terminals with the tape too tight.

• Please tie the pipe and power line together with vinyl

• To enhance the heat insulation and to prevent water

• Completely seal any gap with putty.

• The rubber strap used for fixing the insulator should not be tied with great force. Otherwise, this will damage heat insulation and causes water condensation.

• Please pull the lower part of the Indoor unit

Pipe

Rubber strap tied with great force

4 Installation of Drain Hose

outwards to check if the unit is hooked onto the hanger. Improper installation may cause vibration and noise.

• Transform the piping while holding down the lower portion of pipe-support by hand.

Pipe support

Transform after bending downward.

the hole on the wall and then ready for further connection.

with insulator used for terminal connection. Then the pipes are wrapped with insulation pipe.

cover. (Refer to "CONNECTION OF POWER CORD")

into the space available under the unit. Use holder to hold them tight.

Please select the easier position.

transform and are attached.

Please bend at a small radius to form an arc

connecting refrigerating pipe.

(Refer to "Connection of Power Cord")

are placed into the space available under the Indoor unit.

Wall hole

Drain hose

Connecting cord

Refrigerating pipe

Heat insulation pipe

Pull this to the front during the connection of refrigerating pipe to ease task.

3 Heat Insulation and Finish of the Piping

with heat insulator and then tied up with rubber strap.

If any clearance or over-tightening may cause condensation.

tape as shown in the figure showing the installation of Indoor and Outdoor units.

condensation, please cover the outdoor part of the drain hose and pipe with insulation pipe.

Bending upwards

CAUTION

Ditch

Condensed water pond

You are free to choose the side (left or right) for the installation of drain hose. Please ensure the smooth flow of condensed water of the Indoor unit during installation. (Careless may result in water leakage.)

Condensed water pond

Drain hose

Connecting cord

Pipe

Insulation pipe (must be wrapped with vinyl tape at every 120 mm)

The end of the refrigerating pipes are at locations marked with “▼▼” symbol.

0.85m

Projection

Protection pipe

Drain hose

Connecting cord

Insulation material for pipe connection

Sleeve of protection pipe

Putty

Holder

below 5mm

about 15cm

Holder

Hook

Connected section

Putty

CAUTION

Be sure that the drain hose is not loosely connected bend or proper condition like left figure.

• Please mount the Outdoor unit of stable ground to prevent vibration and increase

30mm

10mm

70mm

30mm

10mm

30mm

10mm

30mm

10mm

30mm

10mm

70mm

10mm

50mm

10mm

50mm

D C B A

of noise level.

• Decide the location for piping after sorting out the different types of pipe available.

• When removing side cover, please pull the handle after undoing the hook by pulling it downward. Reinstall the side cover in the reverse order of the removal.

Please face this side (suction side) of the unit to the wall.

Please remove side cover when connecting the piping and connecting cord.

Pull downward

CAUTION

• Do not touch the suction port, bottom surface, or aluminum fin of the outdoor unit. Failure to do so may cause an injury.

CONDENSED WATER DISPOSAL OF OUTDOOR UNIT

• There is holes on the base of Outdoor unit for condensed water to exhaust.

• In order to flow condensed water to the drain, the unit is installed on a stand or a block so that the unit is 100mm above the ground as shown figure. Join the drain pipe to one hole.

• Cover the drain hole with a bush. To install the bush, put it on the drain hole as shown in the figure and press the both sides of the bush to fit into the hole.

OUTDOOR UNIT

After installation, check whether the drain pipe and bush cling to the base firmly.

BASE

DRAIN HOLE

Push Push

9 BUSH

Outer diameter: 16 mm or more

• Install the outdoor unit horizontally and make sure that condensate drains away.

• In case of using in chilly area Especially, in case that there are many snows by very cold in chilly area, condensed water freezes on the base and may result not to drain. In this case, please remove the bush and the drain pipe at the bottom of unit. (Left and center near discharge portion of air, each 1 place). It becomes smooth drain. Ensure that the distance from the drain hole to the ground is 250 mm or more.

above 100mm

9 BUSH

DRAIN HOLE

0 DRAIN PIPE

1 Preparation of Pipe

• Use a pipe cutter to cut the copper pipe and remove burr.

Trimming tool

Copper pipe

CAUTION

• Remove burr and jagged edge will cause leakage.

• Point the side to be trimmed downwards during trimming to prevent copper chips from entering the pipe.

• Before flaring, please put on the flare nut.

Die

Outer A (mm) Rigid Flaring Tool Diameter (Ø) For R410A tool For R22 tool

6.35 (1/4") 0 - 0.5 1.0

9.52 (3/8") 0 - 0.5 1.0

2 Pipe Connection

• In case of removing flare nut of a indoor unit, first remove a nut of small diameter side, or a seal cap of big diameter side will fly out. Free from water into the piping when

CAUTION

• Please be careful when bending the copper pipe.

• Screw in manually while adjusting the center. After that, use a torque wrench to tighten the connection.

Wrench

INSTALLATION OF REFRIGERATING PIPES AND AIR REMOVAL

working.

• Be sure to tighten the flare nut to the specified torque with a torque wrench. If the flare nut is overtightened, the nut may be split after a long period has passed, and may cause a refrigerant leak.

Flare nut

Small diameter side 6.35 (1/4") 13.7 – 18.6 (140 – 190) Large diameter side 9.52 (3/8") 34.3 – 44.1 (350 – 450)

Small diameter side

Valve

head cap

Torque wrench

Large diameter side

Valve core cap 12.3– 15.7 (125 – 160)

Die

• Please use exclusive tool for

Copper pipe

Outer diameter

of pipe (ø)

refrigerant R410.

Torque N·m

(kgf·cm)

6.35 (1/4") 19.6 – 24.5 (200 – 250)

9.52 (3/8") 19.6 – 24.5 (200 – 250)

3 Remove of Air From The Pipe And Gas Leakage Inspection

Procedures of using Vacuum Pump for Air Removal

As shown in right figure, remove the cap of valve core. Then, connect the charge hose. Remove the cap of valve head.

Connect the vacuum pump adapter to the vacuum pump and connect the charge hose to the adapter.

Fully tighter the "Hi" shuttle of the manifold valve and completely unscrew the "Lo" shuttle. Run the vacuum pump for about 10-15 minutes, then completely tighten the "Lo" shuttle and switch off the vacuum pump.

• Loosen the spindle of the service valve with small diameter by 1/4 turn and tighten the spindle immediately after 5 to 6 seconds.

• Remove the charging hose from the service valve.

When the meter reaches - 101KPa (-76cmHg) during pumping fully tighten the shuttle.

Charge hose

Valve

When pumping starts, slightly loosen the flare nut to check of air sucked in. Then tighten the flare nut.

The body of service valve

AIR REMOVAL

Completely unscrew the spindle of the service valve (at 2 places) in anticlockwise

direction to allow the flow of refrigerant (using Hexagonal Wrench key).

Tighten the cap of valve head. Check the cap's periphery if there is any gas leakage.

The task is then completed.

Gas leakage inspection

Please use gas leakage detector to check if leakage occurs at connection of Flare nut as shown on the right.

If gas leakage occurs, further tighten the connection to stop leakage.

Cap of valve core

Hexagonal wrench Key

Meter showing pressure

Closed

R410A Manifold valve

Valve

Vacuum pump adapter

Cap of valve head

Vacuum pump

• THIS APPLIANCE MUST BE

WARNING

EARTHED.

Procedures of Wiring

When power supplies to Indoor Unit

Line cord

Indoor Unit

Connecting Cord

ø1.6 or ø2.0

Outdoor Unit

ø2.0

When power supplies to Outdoor Unit

Indoor Unit Outdoor Unit

ø1.6 or

ø2.0

Connecting Cord

Detail of cutting the connecting cord

Indoor Unit

Green + Yellow

Outdoor Unit

Green + Yellow

Detail of cutting the connecting cord

Indoor Unit

Green + Yellow

Outdoor Unit

Green + Yellow

WARNING

• The naked part of the wire core should be 10mm fix it to the terminal tightly. Then try to pull the individual wire to check if the contact is tight. Improper insertion may burn the terminal.

• Be sure to use only wire specified for the use of air-conditioner.

CONNECTION OF POWER CORD

• Please refer to the manual for wire connection and the wiring technique should meet the standard of the electrical installation.

• There is an AC voltage drop between the LN terminal if the power is on. Therefore, be sure to remove the plug from its socket.

WARNING

• Leave some space in the connecting cord for maintenance purpose and be sure to secure it with the cord band.

• Secure the connecting cord along the coated part of the wire using the cord band. Do not exert pressure on the wire as this may cause overheating or fire.

Strip wires

Green + Yellow

Strip wires

Wiring of The Indoor Unit

• For wire connection of the Indoor unit, you need to remove the front cover, the low cover under the body of the unit and terminal cover.

When power supplied to outdoor unit

• Power cannot be turned off using power switch. Always keep the switch "off" and put the switch cover on the power switch so that the power cannot be turned on.

• Power cord is not necessary, store it in the lower-side space on the rear side of indoor unit. When storing, warp the power plug with the vinyl bag for the parts, etc. and seal with adhesive tape to prevent dust or dirt.

• Terminal A and B of indoor unit do not need to be connected.

• When power supplied to outdoor unit, power is not turned off by switching

the power of indoor unit to "off". In that case, please cut the breaker.

• Remove the cover from the terminal base and screw the cable.

Connecting cord

Earth

After remove the screw and terminal cover, and put the connecting cords and fix the terminal cover with screw.

Terminal cover

Screw

• Wiring for the horizontal piping from the right side.

Not to interfere with the drain hose, fold the cable at the drain hose side of the electric box as shown in the left figure, and pass the cable just over the electric box and

Cable

Power cord

Electric box

Form the cable properly so that the low cover won’ t touch the cable in installation.

pull it out.

Piping and drain hose layout

Pipe

Drain hose

Securely screw in the power cord and connecting cord so that it will not get loose or disconnect. Tightening torque reference value:

1.2 to 1.6 N·m (12 to 16 kgf·cm) Excessive tightening may damage the interior of the cord requiring replacement.

When putting two connecting cords through the band.

Screw

Insulating plate

Cord band

Connecting cord

WARNING

After wiring the indoor unit, make sure to reattach the terminal cover.

Cable

Pipe

Drain

Power cord

Method to remove the low cover

• Pull at the ¡ and ™ in the directions as shown by

arrows to remove the cover.

Wiring of the Outdoor Unit

• Please remove the side cover for wire connection.

• If you cannot attach the side plate due to the connection cord, please

press the connecting cord in the direction to the front panel to fix it.

• Be sure that the hooks of the side cover fixed in certainly. Otherwise water

WARNING

leakage may occur and this causes short circuit or faults.

• The connecting cord should not touch to service valve and pipes. (it becomes high temperature in heating operation.)

Checking for the electric source and the voltage range

• Before installation, the power source must be checked and necessary wiring work must be completed. To make the wiring capacity proper, use the wire gauge list below for the wiring from house distribution fuse box to the outdoor unit in consideration of the blocked rotor current.

IMPORTANT

Wire length Wire gauge

up to 6m 1.6mm

up to 15m 2.5mm

up to 20m 4.0mm

• Investigate the power supply capacity and other electrical conditions at the installing location. Depending on the model of room air conditioner to be installed, request the customer to make arrangements for the necessary electrical work etc. The electrical work includes the wiring work up the outdoor unit. In localities where electrical conditions are poor, use of a voltage regulation is recommended.

• Install outdoor for the room air conditioner within the reaching range of the line cord.

IMPORTANT

cover

Earth terminal

Fuse Capacity

16A time delay fuse

1 Power Source And Operation Test 2 Installation of Remote Controller

Power Source

WARNING

• Never remodel the power plug nor extend the long-distance cord.

• Keep additional length for the power cord and do not render the plug under external force as this may cause poor contact.

• Do not fix the power cord with U-shape nail.

• The power cable easily generates heat. Do not bring the cable together with a wire or vinyl tie.

• The remote controller can be placed in its holder which is fixed on wall or beam.

• To operate the remote controller at its holder, please ensure that the unit can receive signal transmitted from the controller at the place where the holder is to be fixed. The unit will beep when signal is received from the remote controller. The signal transmission is weaken by the fluorescent light. Therefore, during the installation of the remote control holder, please switch on the light, even during day time, to determine the mounting location of the holder.

The controller must be hooked onto the hook at the lower part of the holder. Push in the remote controller in the direction as shown in figure below.

How to remove the front cover How to Attach the Front Cover

¡ Remove the front panel

• Please remove and attach the front panel by both hands.

¡ Check that the drain pan is securely attached. ™ After installing the front cover onto the unit, hook three claws

at upper side of the cover securely. Then, push the center of the front cover to lock the claws.

£ Tighten the two screws.

• After opening the front panel by both hands.

1 Undo the right arm while pushing it inside. 2 Slide the front panel to right as shown in figure. Then remove

while pulling it to front.

Operation test

Screw (2 pieces)

• Please ensure that the air conditioner is in normal operating condition during the operation test.

• Explain to your customer the proper operation procedures as described in the user' s manual.

• If the indoor unit won't operate, check the cable for correct connection.

• Turn on the lamp in the room where the indoor unit is installed and check the remote controller for normal operation.

Remote controller

Force-cooling operation

• When the service switch

Holder for Remote Controller

Screw

of the indoor unit is

After completing the service switch operation, be sure to keep the switch pressed for one or more

06K108_RAS-35_YH6_English.p65 11/9/06, 10:58 AM2

FINAL STAGE OF INSTALLATION

< S735 : A >

seconds and stop the force-cooling operation.

pressed for 1 or more seconds, the forcecooling operation starts. Use this mode when performing the failure diagnosis or collecting refrigerant into the outdoor unit.

•

CAUTION

Cover

Service switch (If the switch is pressed for one or more seconds, the force-cooling operation starts. If the switch is pressed for additional one or more seconds, the operation stops.)

Do not operate the unit for more than 5 minutes while the spindle of the service valve is closed.

™ Remove the filters. £ After removing two screws, pull the center of the front cover

towards you and release the claws.

¢ Pull the side faces (lower sections) of the front cover towards

you as shown in the figure and remove the cover.

HOW TO REMOVE INDOOR UNIT

• Push up the [PUSH] sections at the bottom of the indoor unit and pull the bottom plate towards you. Then the claws are released from the stationary plate. (The [PUSH] sections are indicated by 2 arrows in the right figure)

¢ Install the filter. ∞ Slide the shafts of the right and left arms on the front panel

along the steps to insert the shafts into the holes till they stop. After checking that the shafts are securely inserted, close the panel.

Hole

[PUSH] mark positions

Shaft

Step