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HOW TO REPLACE THE MAIN PARTS

In document Indoor Unit Outdoor Unit (сторінка 97-116)

WARNING

• Since high voltages pass through the electrical parts, turn off the power without fail before proceeding with the repairs.

Electric shocks may occur if the power plug is not disconnected.

• After the repairs have been completed (after the front panel and cabinet have been installed), perform a test run, and check for smoking, unusual sounds and other abnormalities.

If this check is omitted, a fire and/or electric shocks may occur.

Before proceeding with the test run, install the front panel and cabinet.

• Ensure that the following steps are taken when doing repairs on the refrigerating cycle.

1. Do not allow any naked flames in the surrounding area.

If a gas stove or other appliance is being used, extinguish the flames before proceeding.

If the flames are not extinguished, they may ignite any oil mixed with the refrigerant gas.

2. Do not use welding equipment in an airtight room.

Carbon monoxide poisoning may result if the room is not properly ventilated.

3. Do not bring welding equipment near flammable objects.

Flames from the equipment may cause the flammable objects to catch fire.

If keeping the power on is absolutely unavoidable while doing a job such as inspecting the cir- cuitry, wear rubber gloves to avoid contact with the live parts.

Electric shocks may be received if the live parts are touched.

High-voltage circuits are contained inside this unit.

Proceed very carefully when conducting checks since directly touching the parts on the control circuit board may result in electric shocks.

12-1. Indoor Unit

No.



Part name Front panel

Procedures

1) Stop operation of the air conditioner and turn off its main power supply.

2) Open the air inlet grille, push the arm toward the outside, and remove the grille.

3) Remove the left and right air filters.

Remove the plasma air purifier. (for

Remarks

model RAS-10,13,16SKVR-E only)

– 97 – No.



Part name Front panel

Procedures

4) Press "PUSH" part under the front panel and remove hooks of the front panel from the installation plate.

Remarks

Press Front panel

Installation plate

5) Remove the front panel fixing screws.

(2 pcs.)

6) Take off three hooks of panel from rear side.

<How to assemble the front panel>

1) Press three center positions and two lower center positions of the air outlet, and then hang the hanging hooks (3 pcs.) at the top side of the front panel to the rear plate.

2) Insert the plasma air purifier (for model RAS-10,13,16SKVR-E).

Press in the plasma air parifier until the protrusions on both sides are completely inserted into the holders.

If installation is incomplete, the FILTER indicator (orange) may light.

3) Tighten two screws.

• Incomplete hanging or incomplete pressing may cause a dewdrops or generation of a fluttering sound.

2 Screws

Three hooks

Holder Plasma air purifier

Protrusion

Holder

Protrusion Plasma air purifier

No.

‚

Part name High voltage generator

Procedures

1) Follow to the procedure in the item



.

2) To remove the air ionizer from the back body, pull it toward you.

Remarks

2) Secure it using the fixing screws. (2 pcs) (only in model

RAS-10,13,16 SKVR-E)

3) Connect the connectors of the high-voltage generat

4) Attach the air ionizer to the back body.

<How to assemble the high voltage generator>

1) Insert the high voltage generator straight into the evaporator

voltage generator from the evaporator.

Check whether it is completed inserted.

3) Disconnect the connectors of the high voltage generator.

4) Remove the fixing screws (2 pcs) and remove the high voltage generator from the evaporator.

Connector 2 Screws

– 99 – No.

ƒ

Part name Electric parts box assembly

Procedures

1) Follow the procedure up to 3) in

‚

above.

2) Remove screw of earth lead attached to the end plate of the evaporator.

3) Remove the lead wire cover, and remove connector for the fan motor and connec- tor for the louver motor from the electric parts box assembly.

4) Pull out TC sensor from sensor holder of the evaporator.

Remarks

<How to assemble the electric parts box>

1) Hook the top part of the electric parts box assembly onto the claws on the back body, and secure it using the fixing screw.

Now attach the display unit. Connect the connectors for the fan motor and louver motor.

2) Secure the grounding wire using the fixing screw. Insert the TC sensor into the sensor holder.

* Be absolutely sure to loop the grounding wire and TC sensor leads once at the bottom.

5) Disengage the display unit by simply pushing at the top of the display unit.

6) Remove the fixing screw that secures the electric parts box assembly, and remove the

Electric part box cover

assembly.

connector

AC fan motor connector (For RAS-10, Louver motor

Fixing screw Earth Screw

TC sensor

connecto

13 models only) Fan motor

No.

„

Part name Horizontal louver

Procedures

1) Remove shaft of the horizontal louver from the back body.

(First remove the left shaft, and then remove other shafts while sliding the horizontal louver leftward.)

…

Evaporator

(Heat exchanger)

1) Follow to the procedure in the item

ƒ

.

2) Remove the pipe holder from the rear side of the main unit.

3) Remove two fixing screws at the left side of the end plate of the heat exchanger.

Remarks

4) Remove one fixing screw on the heat exchage fixing holder to separate the heat exchage from the back body.

5) Remove right side of the end plate from two fixing rib while sliding slightly the heat exchanger rightward.

2 screws

Heat exchanger fixing holder

Screw

Rib on the right side of the end plate

– 101 – No.

†

Part name Bearing

Procedures

1) Follow to the procedure in the item . 2) Remove the two screws used to secure the

bearing base.

3) Remove the bearing base.

<Caution at assembling>

• If the bearing is out from the housing, push it into the specified position and then incorporate it in the main body.

Remarks

Two screws

Bearing

Bearing base

No.

‡

Part name Fan motor

Procedures 1) Follow to the procedure till item .

2) Loosen the set screw of the cross flow fan.

3) Remove two fixing screws of the motor cover and them remove the motor cover.

4) Remove two more fixing screws of the motor band and remove the motor band.

Remarks

5) Pull the fan motor outward.

Set screw

Motor cover

Two Screws

Two screws on motor band

– 103 – No.

ˆ

Part name Cross flow fan

Procedures

<Caution at reassembling>

1) To incorporate the fan motor, remove the fan motor rubber (at shaft core side), incorporate the motor into the position in the following figure, and then install the fan motor.

Remarks

U groove

• Install the cross flow fan so that the right end of the 1st joint from the right of the cross flow fan is set keeping 70.5 mm from wall of rear plate of the main unit.

• Holding the set screw, install the cross flow fan so that U-groove of the fan motor comes to the mounting hole of the set screw.

• Perform positioning of the fan motor as follows:

• When assembling the fan motor, the fan motor must be installed in such a way that the fan motor leads will be taken out is positioned at the bottom front.

• After assembling the two hooking claws of the motor band (right) into the main body, position the fan motor, insert it, and then secure the motor band (right) using the two fixing screws.

5 mm

No.



Part name Common procedure

Procedure

1) Turn the power supply off to stop the operation of air-conditioner.

2) Remove the front panel.

• Remove the 2 fixing screws.

3) Remove the electrical part base.

Remarks Replace terminal block, microcomputer ass’y and the P.C. board ass’y.

12-2. Microcomputer

<P.C. board layout>

CN31 CN33 R01 R02

C01

FUSE

L01

C02

C03

CN51

T01

IC12

C121 C133

( RAS-10, 13 Series )

– 105 –

R05 L01 C01 CN23 FUSE R04 R01 CN10

J04 IC03 C20 IC01

T01 C03 DB01

( RAS-16 Series )

12-3. Outdoor Unit

No.



Part name Common procedure

Procedure 1. Detachment

NOTE Wear gloves for this job.

Otherwise, you may injure your hands on the parts, etc.

1) Stop operation of the air conditioner, and turn off the main switch of the breaker for air conditioner.

2) Remove the valve cover.

(ST1TØ4 × 10L 2 pcs.)

• After removing screw, remove the valve cover pulling it downward.

3) Remove cord clamp (ST2TØ4 × 14L 3 pcs.), and then remove connecting cable.

4) Remove the upper cabinet.

(ST1TØ4 × 10L 5 pcs.)

• After removing screws, remove the upper cabinet pulling it upward.

2. Attachment

1) Attach the water-proof cover.

NOTE

The water-proof cover must be attached without fail in order to prevent rain water, etc. from entering inside the indoor unit.

2) Attach the upper cabinet.

(ST1TØ4 × 10L 5 pcs.)

3) Perform cabling of connecting cable, and attach the cord clamp.

• Fix the cord clamp by tightening the screws (ST2T∅4 x 14L 3 pcs.), fitting 2 concave parts of the cord clamp to each connecting cables.

4) Attach the valve cover.

(ST1T∅4 x 10L 2 pcs.)

Insert the upper part into the square hole of the side cabinet, set hook claws of the valve cover to square holes (at three positions) of the main unit, and attach it pushing upward,

Remarks

How to mount the water-proof cover Upper cabinet

Waterproof cover

Valve cover

These 2 bending parts shall be put inside of a unit by bending these 2 ports.

This part shall be put on

the side cabinet.

Fit the corner of the water proof cover to the corner of the front cabinet.

This line shall be pavallel to the front cabinet

This part shall cover the gap between the inverter box and the front cabinet.

– 107 – No.

‚

Part name Front cabinet

Procedure 1. Detachment

1) Perform step 1 in



.

2) Remove the fixing screws (ST1TØ4 × 10L 2 pcs.) used to secure the front cabinet and inverter cover, the screws (ST1TØ4

× 10L 4 pcs.) used to secure the front cabinet at the bottom, and the fixing screws (ST1TØ4 × 10L 2 pcs.) used to secure the motor base.

• The front cabinet is fitted into the side cabinet (left) at the front left side so pull up the top of the front cabinet to remove it.

2. Attachment

1) Insert the claw on the front left side into the side cabinet (left).

2) Hook the bottom part of the front right side onto the concave section of the bottom plate. Insert the claw of the side cabinet (right) into the square hole in the front cabinet.

3) Return the screws that were removed above to their original positions and attach them.

Remarks

Front cabinet

Concave section Claw

Square hole

Revised-1

No.

ƒ

Part name Inverter assembly

Procedure Remarks 1) Perform work of item 1 in



.

2) Remove screw (ST1TØ4 × 10L 2 pcs.) of the upper part of the front cabinet.

• If removing the inverter cover in this condition, P.C. board can be checked.

• If there is no space above the unit, perform work of 1 in

‚

.

Be careful to check the inverter because high-voltage circuit is incorporated in it.

3) Perform discharging by connecting , polarity by discharging resistance (approx.

100Ω40W) or plug of soldering iron to , terminals a of the C14 (printed “CAUTION HIGH VOLTAGE” is attached.) electrolytic capacitor (760µF or 500µF) on P.C. board.

Be careful to discharge the capacitor because the electrolytic capacitor cannot naturally discharge and voltage remains according to trouble type in some cases.

NOTE

This capacitor is one with mass capacity.

Therefore, it is dangerous that a large spark generates if short-circuiting between ,

Requirement

As each connector has a lock mecha- nism, avoid to remove the connector by holding the lead wire, but by holding the connector.

Discharging position (Discharging period 10 seconds or more)

Plug of soldering iron

The connector is one with lock, so remove it while pushing the part indicated by an arrow.

Be sure to remove the connector by holding the connector, not by pulling the lead wire.

4) Remove screw (ST1T∅4 x 10L 4pcs.) fixing the terminal part of inverter box to the main body.

5) Remove the front cabinet by performing step 1 in , and remove the fixing screws (ST1T∅4 x 10L) for securing the main body and inverter box.

6) Remove various lead wires from the holder at upper part of the inverter box.

7) Pull the inverter box upward.

8) Disconnect connectors of various lead wires.

Inverter cover

P.C. board (Soldered surface)

k

– 109 – No.

„

Part name Control board assembly

Procedure

1. Disconnect the leads and connectors connected to the other parts from the control board assembly.

1) Leads

• 3 leads (black, white, orange) connected to terminal block.

• Lead connected to compressor : Disconnect the connector (3P).

• Lead connected to reactor :

Disconnect the two connectors (2P).

2) Connectors (×8)

CN300 : Outdoor fan motor (3P: white)*

(* : See Note)

CN701 : 4-way valve (2P: yellow)*

CN600 : TE sensor (2P: white)*

CN700 : PMV (6P: white) CN603 : TS sensor (3P: white)*

CN601 :TD sensor (3P: white)*

CN602 : TO sensor (2P: white) NOTE

These connectors have a disconnect prevention mechanism: as such, the lock on their housing must be released before they are disconnected.

2. Remove the control board assembly from the P.C.

board base. (Remove the heat sink and control board assembly while keeping them screwed together.)

NOTE

Disengage the four claws of the P.C. board base, hold the heat sink, and lift to remove it.

3. Remove the two fixing screws used to secure the heat sink and control board assembly.

4. Mount the new control board assembly.

NOTE

When mounting the new control board assembly, ensure that the P.C. board is inserted properly into the P.C. board support groove.

Remarks

CN300, CN701, CN600 and CN603 are connectors with locking mechanisms: as such, to disconnect them, they must be pressed in the direction of the arrow while pulling them out.

P.C. board base P.C. board

CN700 CN602 CN300 CN701 CN603

CN601 CN600

Revised-1

No.

…

Part name Side cabinet

Procedure 1. Side cabinet (right)

1) Perform step 1 in

‚

and all the steps in

ƒ

.

2) Remove the fixing screw (ST1TØ4 × 10L 4 pcs.) used for securing the side cabinet to the bottom plate and valve fixing panel.

2. Side cabinet (left) 1) Perform step 1 in

‚

.

2) Remove the fixing screw (ST1TØ4 × 10L 1 pc.) used to secure the side cabinet (left) onto the heat exchanger.

3) Remove the fixing screw (ST1TØ4 × 10L 2 pcs.) used for securing the side cabinet to the bottom plate and heat exchanger.

Remarks

Detail A Detail B Detail C

1) Perform work of item 1 of



and

‚

.

2) Remove the flange nut fixing the fan motor and the propeller.

• Flange nut is loosened by turning clock- wise. (To tighten the flange nut, turn counterclockwise.)

3) Remove the propeller fan.

4) Disconnect the connector for fan motor from the inverter.

5) Remove the fixing screws (4 pcs.) holding by hands so that the fan motor does not fall.

* Precautions when assembling the fan motor

Tighten the flange nut using a tightening torque of 4.9 N•m.

†

Fan motor

Hook the claw noto the bottom plate

The back body section hooked onto the bottom plate here.

Propeller fan

Fan motor

Flange nut

– 111 – No.

‡

Part name Compressor

Procedure

1) Perform work of item 1 of



and

‚

,

ƒ

,

„

,

…

.

2) Extract refrigerant gas.

3) Remove the partition board.

(ST1TØ4 × 10L 3 pcs.)

4) Remove the sound-insulation material.

5) Remove terminal cover of the compressor, and disconnect lead wire of the compressor from the terminal.

6) Remove pipe connected to the compressor with a burner.

• Take care to keep the 4-way valve away from naked flames. (Otherwise, it may malfunction.)

7) Remove the fixing screw of the bottom plate and heat exchanger. (ST1TØ4 × 10L 1 pc.) 8) Remove the fixing screw of the bottom plate

and valve fixing plate.

(ST1TØ4 × 10L 1 pc.)

9) Pull upward the refrigeration cycle.

10) Remove BOLT (3 pcs.) fixing the compres- sor to the bottom plate.

* Precautions when assembling the com- pressor.

Tighten the compressor bolts using a tightening torque of 4.9 N•m.

Remarks

ˆ

Reactor 1) Perform work of item 1 of

‚

, and

ƒ

.

2) Remove screws fixing the reactors.

(ST1TØ4 × 10L 4 pcs.) Reactor

Partition

Compressor

Valve board

fixing plate

Revised-1

No.

‰

Part name Electronic expansion valve coil

Procedure 1. Detachment

1) Perform step 1 in

‚

, all the steps in

ƒ

and 1 in

…

.

2) Remove the coil by rotating it at 90° toward either direction.

2. Attachment

1) Insert a valve coil in a volve body to the bottom, and fix it by rotating at 90° toword either direction. And confirm to fix it surely.

Remarks

Hooking claw Minus screwdriver

Š

Fan guard 1. Detachment

1) Perform work of item 1 of

‚

.

2) Remove the front cabinet, and put it down so that fan guard side directs downward.

Perform work on a corrugated cardboard, cloth, etc. to prevent flaw to the product.

3) Remove the hooking claws by pushing minus screwdriver according to the arrow mark in the right figure, and remove the fan guard.

2. Attachment

1) Insert claws of the fan guard in the holes of the front cabinet. Push the hooking claws (9 positions) by hands and fix the claws.

Check that all the hooking claws are fixed to the specified positions.

Lead

connecting part Notch

Coil inserting position

Fixing hole for coil

Coil fixing position

Rotate 90°

– 113 – No.

11

Part name Procedure Remarks

TE sensor (outdoor heat exchanging temperature sensor)

• Attachment

Install the sensor onto the straight pipe part of the condenser output pipe.

CAUTION

During the installation work (and on its completion), take care not to damage the coverings of the sensor leads on the edges of the metal plates or other parts. It is dangerous for these coverings to be damaged since damage may cause electric shocks and/or a fire.

CAUTION

After replacing the parts, check whether the positions where the sensors were installed are the proper positions as instructed. The product will not be controlled properly and trouble will result if the sensors have not been installed in their proper positions.

• Shown in the above figure is the model 13SAVR-E and 16SAV-E.

• The sensor mounting positions in the model 10SAVR-E, Detail C for RAS-13-16SAVR-E,

Detail C for RAS-10SAVR-E,

TS sensor (Suction pipe temperature sensor)

• Attachment

Install the senser onto the straight pipe part of the suction pipe. Be careful for the lead direction of the sensor.

TD sensor (Discharge pipe temperature sensor)

• Attachment

With its leads pointed upward, install the sensor onto the vertical straight pipe part of the discharge pipe.

TO sensor (Outside air temperature sensor)

• Attachment

Insert the outdoor air temperature sensor into the holder, and install the holder onto the heat exchanger.

Detail A TS sensor

Detail B TD sensor

Arrow D TO sensor 12

13

14

16SAV-E 13SAV-E

Arrow D

Detail C Detail A

Detail B

13SAV-E and 16SAVR-E are all the same witth the sole excep- tion of the TE sensor. Refer to the figure shown on the left.

TO sensor holder

No.

15

Part name Replacement of temperature sensor for servicing only Common service parts of sensor TO, TS, TE, TD

Procedure

1) Cut the sensor 100 mm longer than old one.

2) Cut the protective tube after pulling out it (200 mm).

3) Move the protective tube toward the thermal sensor side and tear the tip of lead wire in two then strip the covering part.

4) Pass the stripped part through the thermal constringent tube.

5) Cut the old sensor 100 mm length on the connector side, and recycle that connector.

6) Tear the lead wire in two on the con- nector side and strip the covering part.

7) Twist the leads on the connector and sensor sides, and solder them.

8) Move the thermal constringent tubes toward the soldered parts and heat them with the dryer and constring them.

9) Wind the attached color tape round the both terminals of the protective tube when colored protective tube is used.

10) Fix the sensor again.

Remarks

1 2 3 4 5 6

Parts name Sensor

Sensor Spring (A) Sensor Spring (B)

Thermal constringent tube Color tape

Terminal

Q'ty 1 1 1 3 1 3

Cutting here

Cutting here

Cutting here

Soldered part

Dryer

Winding the color tape 100

200

Connector Thermal

sensor part

Thermal constringent tube

70 15

100

70 15

NOTE

1) Store the joint part of the sensor and the connector in the electric parts box.

2) Never joint them near the thermal sensor part. Otherwise it would cause insulation inferiority because of dew drops.

3) When replacing the sensor using the colored protective tube, wind the color tape matching the color of that tube.

These are parts for servicing sensors.

Please check that the accessories shown in the right table are packed.

Remarks Length : 3m For spare For spare

Including one spare 9 colors

In document Indoor Unit Outdoor Unit (сторінка 97-116)