Samsung AQ09A5(6)MAF, AQ12AA(B)MCF, UQ09A5(6)MAF, UQ12AA(B)MCF Service Manual

Manual

SERVICE

SPLIT TYPE AIR CONDITIONER

Indoor Unit

AQ09A5(6)MAF AQ12AA(B)MCF

Outdoor Unit

UQ09A5(6)MAF UQ12AA(B)MCF

E DB98-15777A(1)

Safety Precautions

The following safety precautions must be taken when using your air conditioner.

WARNING

DURING OPERATION

Risk of electric shock. • Can cause injury or death. • Disconnect all remote electric power supplies before servicing, installing or cleaning. • This must be done by the manufacturer or its service agent or a similar qualified person in order to avoid a hazard.

◆ Users of this product are cautioned not to attempt repair of this product at their own discretion. Instead, they are requested to directly contact a designated service center or the outlet at which the product was purchased.

◆ Never spill any kind of liquid into the unit. Should this happen, unplug or main switch off the unit and contact an authorized service center.

◆ Do not insert anything between the air outlet blades because the inner fan may be damaged and could cause injury. Keep children away from

the unit.

◆ Do not place any obstacles in front of the unit.

◆ Do not spray liquid of any kind into the indoor unit. Should this happen,

switch off the breaker used for your air conditioner and contact your

installation specialist.

◆ Make sure that the unit is correctly ventilated at all times: Do not place clothing or other materials over it.

◆ If the wireless remote control will not be used for a long time, remove the batteries. (If applicable)

◆ When using a wireless remote control, the distance should not be more than 23ft(7m) from the air conditioner. (If applicable)

ISPOSING OF THE UNIT

OTHERS

◆ Before throwing out the device, it is necessary to pull back the battery cells and get rid of them safely for recycling reasons.

◆ When you need to dispose of the unit, consult your dealer. If pipes are removed incorrectly, refrigerant may blow out and come into contact with your skin, causing injury. Releasing refrigerant into the atmosphere also damages the environments.

◆ Please recycle or dispose of the packaging material for this product in an environmentally responsible manner.

◆ Never store or ship the air conditioner upside down or sideways to avoid damage to the compressor.

◆ The appliance is not intended 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.

◆ Max current is measured according to IEC standard for safety and current is measured according to ISO standard for energy efficiency.

Contents

DISASSEMBLE AND REASSEMBLE

1. Indoor unit

2. Outdoor unit

ΙΙ

SET UP THE OPTION CODE

ΙΙΙ

TROUBLESHOOTING

1. Items to be checked first

2. Abnormal diagnosis by symptom

ΙΛ

ASSEMBLY DRAWING AND PART’S LIST

1. Indoor unit

2. Outdoor unit

3. Assembly control in

4. Assembly control out

REFRIGERATING CYCLE BLOCK DIAGRAM

ERFORMANCE CURVE

ΛΙΙ

WIRING DIAGRAM

1. Indoor unit

2. Outdoor unit

ΛΙΙΙ

SCHEMATIC DIAGRAM

1. Indoor unit

2. Outdoor unit

SPLIT TYPE

AIR CONDITIONER

Disassemble and reassemble

Stop operation of the air conditioner and remove the power cable before repairing the unit.

1 Indoor unit

If you disassemble the heat exchanger, you must pump down at first.

No. Part Procedure Remark

Front Panel

1) Stop the operation of the air conditioner and block the main power.

2) Separate the tape from the front panel.

3) Contract the second finger to the left, and right handle. And pull the inlet grille to open.

4) Take the left and right filter out.

*Taking off the deodorizing filter.

5) Loosen one of the right screw and separate the terminal cover.

6) Loosen three screws of front panel.

7) Pull the upper left, center and right of discharge softly so that the outside cover is pulled out.

8) Pull softly the lower part of discharge and push it up.

Caution

Assemble the front panel and fix the hooks of left, center and right.

No.

Part

Procedure Remark

Electrical

Parts

(Main PCB)

Assembly Tray

Drain

Heat

Exchanger

1) Take all the connector of PCB on the upper part. (Included Power cord)

2) Separate the outdoor unit connection wire from the terminal block.

3) If you pull out the main PCB up, it will be taken out.

1) Separate the drain hose from the extension drain hose.

2) Pull tray drain out from the back body.

1) Loosen two ground screws at the right side.

2) Separate the connection pipe.

3) Separate the holder pipe at the rear side.

4) Loosen three screws at the right and left side.

5) Lift the heat exchanger up a little to push the upper side to separate it from the indoor unit.

Fan Motor and

Cross Fan

1) Loosen two screws and separate the motor holder.

2) Loosen the screw of fan motor.

(By use of M3 wrench)

3) Separate the fan motor from the fan.

4) Separate the fan from the left holder

bearing.

Disassemble and reassemble (cont’d)

2 Outdoor unit

■ UQ09A5(6)MAF

No. Part Procedure Remark

Common Work

1) Loosen screws and separate the cover E-part.

2) Separate the connection wire from the terminal block.

3) Loosen five screws and separate the upper cabinet.

4) Loosen a screw of the control box.

5) Loosen nine screws and separate the

side cabinet.

Fan Motor

1) Loosen four screws and separate Guard Fan from the front cabinet.

No. Part Procedure Remark

2) Remove the nut flange (Turn to the clockwise).

3) Separate the fan.

4) Loosen four screws to separate the motor.

Heat

Exchanger

Compressor

1) Release the refrigerant.

2) Loosen two screws of left and right side.

3) Disassemble the inlet and outlet pipe by welding.

4) Separate the heat exchanger.

1) Release the refrigerant.

2) Loosen the nut on the terminal cover and open the terminal cover.

3) Separate the OLP and the compressor wire.

4) Disassemble the inlet and outlet pipe of compressor by welding.

5) Disassemble the inlet and outlet pipe of condenser by welding

6) Loosen three bolts of the lower part.

7) Separate the compressor.

Disassemble and reassemble (cont’d)

■ UQ12AA(B)MCF

No. Part Procedure Remark

Common Work

1) Loosen a screw and separate the cover E-part.

2) Separate the connection wire from the terminal block.

3) Loosen thirteen screws and separate the front cabinet.

4) Loosen a screw of the control box.

5) Loosen four screws and separate the side cabinet.

No. Part Procedure Remark

Fan and Motor

Heat Exchanger

1) Remove the nut flange (Turn to the clockwise).

2) Separate the fan.

3) Loosen four screws to separate the motor.

1) Release the refrigerant.

2) Loosen screws of left and right side.

3) Disassemble the inlet and outlet pipe by welding.

4) Separate the heat exchanger.

Compressor

1) Release the refrigerant.

2) Open the terminal cover of compressor and unscrew the connection terminal.

3) Separate the OLP and the compressor wire.

4) Disassemble the inlet and outlet pipe of compressor by welding.

5) Loosen three bolts of the lower part.

6) Separate the compressor.

ΙΙ

Set up the option code

The method for setting up the model option with the remote control

◆ It is necessary to set up option codes after replacing the main PCB with service parts.

Make sure that you can set up option codes of the remote control after replacing the main PBA. Otherwise, the unit won’t be working properly and all LED lamps on display will be flickering.

Step 1

Step 2

NNNNoooottttee

Preparing for the remote control to the main PCB option set.

1. Remove the battery from the remote control.

2. Press the temperature button simultaneously and insert the battery again.

3. Make sure the remote control display shown as .

Preparing for the remote control option set.

In case that the wrong letter has been selected; continue to press the button until the correct letter appears.

1. If the number “ ”appears on the display, proceed to the second stage.

2. Every time you press the 1) and 7) button, “ ” and “ ” continue to appear.

3. Every time you press the 2), 3), 4), 5), 6), 8), 9), 10), 11), 12) button, the number increases from ~ ( , , , , , , , , , ) and , , , , , in order.

1) If the first number is , it is correct. Otherwise, press the button until appears.

2) When pressing the button ~ on the display, select one of them.

3) When pressing the button ~ on the display, select one of them.

4) When pressing the button ~ on the display, select one of them.

5) When pressing the button ~ on the display, select one of them.

6) When pressing the button ~ on the display, select one of them.

7) If the first number is , it is correct. Otherwise, press the button

until appears.

8) When pressing the button ~ on the display, select one of them.

9) When pressing the button ~ on the display, select one of them.

10) When pressing the button ~ on the display, select one of them.

11) When pressing the button ~ on the display, select one of them.

12) When pressing the button ~ on the display, select one of them.

Step 3

Step 4

Step 5

NNNNoooottttee

Reconfirming the option set after completing

Example : 014A25-1700b7

Press the button for the “ ” mode and the display will be shown as . Press the button for the “ ” mode and the display will be shown as .

Pressing the (On/Off)button

When pressing the (On/Off)button in the direction of the remote control for unit, it sounds beep or ringing and the first LED lamp on the left side is flickering at the same time, then the input option is completed. If it doesn’t sound ringing, try again by pressing the (On/Off)button.

Testing the unit

1 Remove the battery from the remote control.

2. Insert the battery into the remote control.

3. Press the (On/Off)button in the direction of the remote control for set.

Error mode

1. If all lamps of the indoor units are flickering, plug out and in again and press the (On/Off)button again.

2. If the unit doesn’t work properly or all lamps are continuously flickering after setting the option

code, check that the option code is set properly for its own model.

ΙΙ

Set up the option code(cont’d)

Table of the option code

Model

AQ09A5MAF

AQ09A6MAF

AQ12AAMCF

AQ12ABMCF

Option code

016A25-1700Fb

006A25-1700Fb

017227-170340

007227-170340

ΙΙΙ

Troubleshooting

1 Items to be checked first

1) The input voltage should be voltage rating within ±10% range. The air conditioner may not operate properly if the voltage is out of this range.

2) Is the connection cable linking the indoor unit and the outdoor unit properly? The indoor unit and the outdoor unit shall be linked by six cables. Check the terminals if the indoor unit and outdoor unit are properly linked by the same number of cables. Otherwise the air conditioner may not operate properly.

3) When a problem occurs due to the contents illustrated in the table below it is a symptom not related to the malfunction of the air conditioner.

No.

The STD operation indicator, LED blinks when a

power plug of the indoor unit is plugged in at first.

In the Cool mode, the compressor does not operate at a room temperature higher than the setting temperature while the indoor fan operates.

In the Heat mode, the compressor does not operate at a room temperature lower than the setting temperature that the indoor fan should operate.

The Fan speed is not allowed in the Auto or

Dry mode.

Compressor stops operating intermittently

in the Dry mode.

Compressor of the outdoor unit is operating although it is turned off in a Heat mode.

Only timer LED of the indoor unit lights up and the

air conditioner does not operate.

The compressor and indoor fan stop intermittently in the Heat mode.

Indoor fan and outdoor fan stop operating intermittently in the Heat mode.

The compressor stops intermittently in the Cool mode or Dry mode and the fan speed of the indoor

unit decreases.

Operation of air conditioner

Explanation

It indicates power is on. The LED stops blinking if the operation On/Off button on the remote control is pushed.

It happens after three minutes when the compressor is reoperated. The same phenomenon occurs when a power is on. As a phenomenon that the compressor is reoperated after three minutes, the indoor fan is adjusted automatically with reference to a temperature of the air.

The speed of the indoor fan is set to LL in the Dry mode. The Fan speed is five steps are selected automatically in the Auto mode.

Compressor operation is controlled automatically in the Dry mode depending on the room temperature and humidity.

When the unit is turned off while de-ice is activated, the compressor continues operating for up to 9 minutes (maximum) until the deice is completed.

The Timer is being activated and the unit is in the ready mode. The unit operates normally if the timer operation is cancelled.

The compressor and indoor fan stop intermittently if room temperature exceeds a setting temperature in order to protect the compressor from overheated air in a HEAT mode.

The compressor operates in a reverse cycle to remove exterior ice in the Heat mode, and indoor fan and outdoor fan do not operate intermittently for within 20% of the total heater operation

The compressor stops intermittently or the fan speed of the indoor unit decreases to prevent inside/outside air from freezing depending on the inside/outside air temperature.

4) Indoor unit observes operation condition of the air conditioner, and displays self diagnosis details on the display panel.

No.

STD LED blinking (1Hz)

TIMER LED blinking (1Hz)

STD and TIMER LED blinking (1Hz)

NATURE LED blinking (1Hz)

ALL LED blinking (1Hz)

Display

Self Diagnosis

Restore from power failure (input initial power)

Indoor unit Room sensor Error (open or short)

Indoor unit heat exchanger temperature sensor Error (open or short)

Indoor fan malfunctioning (for speed is below 450rpm)

Option Error

ΙΙΙ

Troubleshooting (cont’d)

2 Abnormal diagnosis by symptom

■ AQ09A5(6)MAF

1. No Powerr--

1. No Powe

Initial diagnosis

1) Checklist :

(1) Is input voltage normal? (2) Is AC power linked correctly? (3) Is output voltage of DC regulator IC KA78L05 (IC02) normal? (4.5VDC-5.5VDC)

2) Troubleshooting procedure

YES

Replace PCB

display

Is DC voltage of PCB

display normal?

Is voltage rating within ±10%

range applied to the primary

side(~,~) of the “BD71”?

Check linkage between

a power cord and

a terminal tap

Check fuse

Does 325VDC appear in

the secondary side (+, -)

of “BD71”?

Replace

SMPS PARTS

Replace resonator (X301)

Is operation normal?

YES

Remove the power cord and plug in

again in approx. five seconds

YESNO

Does the lamp blink?

Does it start operating when

you push the On/Off button

on the remote control?

Is transmission display of the

remote control unit blinking?

Does the ‘beep’ sound from the

Is DC voltage of the PCB module

Are voltages of #33 (IC04 : compressor), #36 (IC04 : 4-way valve) and #34 (IC04 :

outdoor fan) of Micom normal? 5VDC Is voltage of #32 (IC04 : indoor fan) of

DC5V

Is voltage of #10 (IC04) terminal of Micom normal?

Is voltage of #9 (IC04) terminal of Micom normal?

Is voltage of #3 (IC04) terminal of

Are voltages of #12 (IC04) and

#11 (IC04) of Micom normal?

YES

main unit?

YES

normal?

YES

Micom normal?

10ms

YES

Micom normal?

10ms

YES

Replace

Micom

0VDC

5VDC

250ns

YES

Refer to remote control

unit abnormal diagnosis

Are voltages of RY71(Compressor)

normal? DC12V

Is voltage of SS71(indoor fan)?

Check connections

of compressor and indoor fan

Is output voltage of ICO2 normal?

Check PCB pattern

Replace the main PCB

Normal

Replace PCB

module

YES

Replace

RY71 and

SS71

YES

Replace ICO2

Is voltage output terminal of

PC814A (PC02) normal?

YES

Replace PC814A(PC02)

+ 30 hidden pages

Samsung AQ09A5(6)MAF, AQ12AA(B)MCF, UQ09A5(6)MAF, UQ12AA(B)MCF Service Manual

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