Samsung AM27A1C07 User manual

SERVICE
Manual
CONTENTSAIR CONDITIONER
1. Installation
2. Disassembly and Reassembly
3. Troubleshooting
4. Exploded Views and Parts List
5. Refrigerating Cycle Block Diagrams
6. Wiring Diagrams
7. Schematic Diagrams
ROOM AIR CONDITIONER
INDOOR UNIT
AM27A1C07
AM27A1C13
OUTDOOR UNIT
UM27A1C3
E DB68-31039A(5)
1-31039A(5)-CO 4/17/01 5:35 PM Page 1
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1. Installation
1-1 Refrigerant Refill Procedure
¥ Refill the refrigerant according to the criteria for pipeline lengths of the unit A and B as
shown in the right table at the time of initial installation.
¥ Refill an air-conditioner with refrigerant when refrigerant has been leaked at installing or using.
1. Remove the valve stem cap and service port of 3-way
valve.
3. Operate the unit at the cooling mode.
4. Slowly open the valve of the low pressure side of
Manifold gauge counterclockwise until the low pressure
of manifold gauge indicates 4.8 to 5.5 kg/cm2(68 a
78psi) at the high cool operation (1-unit operation) and
the standard temperature.
It is recommend that refrigerant should be slowly put in.
If the refrigerant is put in too quickly, compressor will be
damaged.
5. Stop operation of the air conditioner.
6. Disconnect the charge hose of manifold gauge.
7. Close the cap of each valve.
2. Connect the charging hose of low pressure side of
Manifold gauge to the packed valve having a charging
port(1/2Ó Packed valve) as shown at the right figure.
¥ Piping length and the height
Additional refrigerant charge
(R22,g)
¥ When length of the pipe is
over 5u by the unit, you
should charge
the refrigerant Formulas
A-UNIT : 10gx(L1-10)/m
B-UNIT : 10gx(L2-10)/m
(L1:the length of A-unitÕs
pipe L2 : the total length of
B & C unitÕs pipe)
INDOOR UNIT
OUTDOOR UNIT
A
B
A-UNIT 15m(49ft 3in)
15m(49ft 3in)
15m(49ft 3in)
3m(9ft 10in)
3m(9ft 10in)
3m(9ft 10in)
Max.piping
length
A
Max
height
BLIQUID GAS
1/4Ó 1/2Ó
1/4Ó 3/8Ó
1/4Ó 3/8Ó
B-UNIT
C-UNIT
Pipe Size
INDOOR
A-UNIT
INDOOR
B-UNIT
INDOOR
C-UNIT
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1-2 ÒPump downÓ Procedure
1. Confirm that both the 2-way and 3-way valves are set to
the open position.
(1) Remove the valve stem caps.
(2) Be sure to use a hexagonal wrench to operate the Gas side
valve stems.
2. Operate the unit for 10 to 15 minutes.
3. Stop operation and wait for 3 minutes, then connect the
charge set to the service port of the 3-way valve.
(1) Connect the charge hose with the push pin to the
service port.
4. Air purging of the charge hose.
(1) Open the low-pressure valve on the charge set
slightly to air purge from the charge hose.
5. Set the liquid side 2-way valve to the closed position.
6. Operate the air conditioner at the cooling cycle and stop
operation immediately after setting the 3-way valve to
the closed position when the gauge indicates 0
kg/cm2G.
If the unit can not be operated at the Cooling
Mode(weather is rather cool), operate the unit at the
Trubo Mode. So that the unit can be operated.
7. Disconnect the charge set, and mount the both 3-way valveÕs
stem nuts and the service port cap.
Relocation of the air conditioner
¥ Refer to this procedure when the unit is relo-
cated.
1. Carry out the pump down procedure
(refer to the details of Ôpump downÕ).
2. Remove the power cord.
3. Disconnect the assembly cable from the
indoor and outdoor units.
4. Remove the flare nut connecting the indoor
unit and the pipe.
At this time, cover the pipe of the indoor
unit and the other pipe using a cap or vinyl
plug to avoid foreign material entering.
5. Disconnect the pipe connected to the outdoor
unit.
At this time, cover the valve of the outdoor
unit and the other pipe using a cap or vinyl
plug to avoid foreign material entering.
6. Make sure you do not bend the connection
pipes in the middle and store together with
the cables.
7. Move the indoor and outdoor units to a new
location.
8. Remove the mounting plate for the indoor
unit and move it to a new location.
2-Way Valve
3-Way Valve
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2. Disassembly and Reassembly
2-1 Indoor Unit
Stop operation of the airconditioner and remove the power plug from the wall outlet before repairing
the unit
No Parts Procedure Remark
1Front Grille 1) Stop the air conditioner operation and block the
main power.
2) Seperate the tape of front.
Panel upper.
3) Contract the second finger to the left and right
handle and pull to open the inlet grille.
4) Take the left and right filter out.
5) Loosen one of the right fixing screw and seper-
ate the terminal cover.
6) Open the cover screw and loosen three fixing
screws of front grille.
7) Pull the upper left and right of discharge softly
for the outside cover to be 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 and right.
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No Parts Procedure Remark
Filter Frame
Ass'y Tray Drain
Main PCB
1) Loosen the left and right screw of the Holder
Filter, and Separate the Holder Filter.
1) Do , above.
Separate the holder at the rear side of Indoor
unit.
2) Take the display PCB out.
(Center of indoor unit).
3) Loosen three fixing screws of left and right.
4) Pull tray drain out from the back body.
1) Do " ", above
2) Take all the connector of PCB upper side out.
(Inclusion Power cord)
3) Separate the outdoor unit connection wire from
the terminal block.
4) If pulling the Main PCB up, it will be taken out.
(Separate the TRANS hook, it before).
2
1 2
1 2
3
4
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No Parts Procedure Remark
Heat Exchanger
Fan Motor and
Cross Fan
1) Do " ", above.
2) Loosen the left screws of the heat exchanger.
1) Do " ", above.
2) Loosen the fixing two screws and separate the
motor holder.
3) Loosen the fixing screw of motor fan.
(By use of M3 wrench)
Separate the motor from the fan.
Separate the fan motor the left holder bearing.
51 2 3 4
1 2 3 4 5
6
Lifting the heat exchanger up a little to
push the up side for separation from the
indoor unit
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2-2 Outdoor Unit
No Parts Procedure Remark
Cabinet
Fan Motor &
Propeller Fan
1) Turn off the unit and remove the power cable
2) Remove the top cover.
3) Remove the control box cover.
4) Unplug the ass'y cable.
5) Remove the cabi-side.
6) Remove the cabi-front.
* When you assemble the parts, check if the
each parts and electric connectors are fixed
firmly.
1) Do Procedure above.
2) Remove the nut flange.
(Turn to the right to remove as it is a left turned
screw)
3) Disassemble the propeller fan.
1
1
2
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3. Troubleshooting
3-1 Items to be checked first
1) The input voltage should be rating Voltage ±10% range.
The air conditioner may not operate properly if the voltage is out of this range.
2) The indoor unit and the outdoor unit shall be linked by 4 cables.
Check the terminals if the indoor unit and outdoor unit are properly linked by the same num-
ber of cables. Otherwise the air conditioner may not operate properly.
3) If a problem occurs as described in the table below, it is a symptom not related to the mal-
function of the air conditioner.
4) Indoor unit observes operation condition of the air conditioner, and displays self diagnosis details
on the display panel.
NO Operation of air conditioner
The operation indication LED (Green) blinks when a power
plug of the indoor unit is plugged in for the first time.
¥ In a COOL operation mode, the compressor does not operate
at a room temperature than the setting temperature that the
compressor should operate.
Fan speed setting is not allowed in AUTO or DRY mode.
Compressor stops operation intermittently in DRY mode.
Timer LED only of the indoor unit lights up and the air condi-
tioner does not operate.
The compressor stops intermittently in a COOL mode or DRY
mode, and fan speed of the indoor unit decreases.
1
2
3
4
5
6
It indicates power is on. The LED stops blinking if the operation
ON/OFF button on the remote control unit is pushed.
¥Inhappensafteradelayof 3minuteswhen thecompressorisreop-
erated. The same phenomenon occurs when a power is on.
¥ As a phenomenon that the compressor is reoperated after a delay
of 3 minutes, the indoor fan is adjusted automatically with refer-
ence to a temperature of the air blew
¥ The speed of the indoor is changed automatically in DRY mode.
¥ Fan speed is 4 steps is selected automatically in AUTO mode.
Compressor operation is controlled automatically in DRY mode
depending on the room temperature.
Timer is being activated and the unit is in ready mode.
The unit operates normally if the timer operation is cancelled.
The compressor stops intermittently or the fan speed of the indoor
unit decreases to prevent inside/outside air frozen depending on
Explanation
NO Display
1 OPERATING LED (GREEN) blinking (1Hz)
2 TIMER LED (YELLOW) blinking (5Hz)
3 OPERATING (GREEN), TIMER LED (YELLOW) blinking (5Hz)
4 FAN (GREEN) LED blinking (5Hz)
Restore from power failure (input initial power)
Temperature sensor defective (open, short)
Indoor heat exchanger sensor defective (open, short)
Indoor fan malfunction (inoperative within 15 sec -
less than 600rpm)
Self Diagnosis
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3-2 Fault Diagnosis by Symptom
3-2-1 No Power(completely dead)-Initial diagnosis
1) Checklist :
(1) Is input voltage normal?
(2) Is AC power linked correctly?
(3) Are connections between primary side, secondary side of the power transformer
and PCB good.
(4) Is output voltage of DC regulator IC KA7812(IC01) normal? (11.5VDC-12.5VDC)
(5) Is output voltage of DC regulator IC KA7805(IC02) normal? (4.5VDC-5.5VDC)
2) Troubleshooting procedure
Y
N
Y
Y
N
N
N
N
Y
N
Y
Y
Remove power cord and plug in again in approx. 5 seconds.
Is operating lamp lights on for
three minutes, and then goes off?
Check whether the fuse is normal? (F701)
Check whether the output voltage of the trans
is normal? (AC 15V±3V)
Check whether the DC 12V is normal?
(DC12±0.5V between "G" and "O" of the IC01)
Check whether the DC 5V is normal?
(DC 5V±0.5V between "G" and "O" of the IC02)
Check whether the display PCB is normal?
(Check the DC 5V, DC12V, wire, etc.)
Replace the assembly main PCB.
Normal
Replace the fuse (250V, 3.15A)
Replace the trans.
Replace the IC01.
Replace the IC02.
Replace the assembly display PCB
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3-2-2 When the Indoor Unit Fan Does Not Operate. (Initial Diagnosis)
1) Checklist :
(1) Is input voltage normal?
(2) Is the indoor unit fan properly connected(CN73)(CN43)?
(3) Is the starting codenser CR 71 properly soldered?
(4) Is HALL IC in indoor fan motor properly connected(CN43)?
(5) When in operation mode, does the indoor unit fan operate?
2) Troubleshooting procedure
Y
N
Y
N
Y
N
Y
Y
N
N
Y
Y
N
Remove power cord and plug in again in approx. 5 seconds.
Is operating lamp lights on for
three minutes, and then goes off?
Check whether the indoor fan turns with the operation
lamp being turned on when the start/stop button of the
remote control is pressed?
¥Is a voltage of above rating voltage ± 10%applied to
both ends of theindoor fan connector (CN73)?
¥Is pin #3 of the CN43 a square wave?
Check the indoor fan motor or fan motor capacitor.
Check the Q401 (KSC945Y).
Replace the IC07.
Replace the SS71 (G3MB202PL).
Go to the item of "No power
parts" (Refer to page 8.)
No problem (Normal)
Is pin #63 of the micom (IC04)
a square wave?
Is pin #16 of the IC07 a square wave?
Is pin #24 of the micom (IC04)
a square wave?
Replace the micom (IC04).
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Index