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Samsung UM18A1C2, Service Manual

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Samsung UM18A1C2 Service Manual Download Page 24

23

5. Refrigerating Cycle Block Diagram (UM26A1C2/UM18A1C2)

Refrigerating cycle temperature and pressure

INDOOR UNIT

OUTDOOR UNIT

2-way valve

3-way valve

Capillary tube

T1

T2

Gas side

Cooling

Gas leak
check point

Liquid side

(A)

(B)

Compressor-B

Compressor-A

Heat
exchanger
(Condenser)

Heat
exchanger
(Evaporator)

Cross fan

Cross fan

Propeller fan

Operating Condition

STD Pressure

(psi)

3-WAY V/V

Piping Temp.(ûF)

Use Temp. Condition (ûF)

T1

T2

Indoor

Outdoor

DB

80

80

67

50~54

61~64

34~39

64~78

-

-

Cooling

Standard

Max over load

Low temp

50~54

61~64

34~39

67

67

57

95

115

67

75

75

57

WB

WB

DB

1-  4/17/01 4:41 PM  Page 23

Summary of Contents for UM18A1C2

Page 1: ... 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 AM26A1C13 AM18A1C09 OUTDOOR UNIT UM26A1C2 UM18A1C2 E DB68 31040A 5 1 31040A 5 CO 4 17 01 3 58 PM Page 1 ...

Page 2: ...ompressor 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 ...

Page 3: ...efer to this procedure when the unit is relocated 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 ...

Page 4: ...tract 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 a...

Page 5: ... 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 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 1 4 17 01 4 41 PM Page ...

Page 6: ... 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 5 1 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 1 4 17 01 4 41 PM Page 5 ...

Page 7: ... 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 AM18A1C2 AM26A1C2 AM26A1C2 AM18A1C2 1 4 17 01 4 41 PM Page 6 ...

Page 8: ...ts up and the air conditioner does not operate 6 The compressor stops intermittently in a COOL mode or DRY mode and fan speed of the indoor unit decreases It indicates power is on The LED stops blinking if the operation ON OFF button on the remote control unit is pushed In happens after a delay of 3 minutes when the compressor is reop erated The same phenomenon occurs when a power is on As a pheno...

Page 9: ...rminal of the Micom normal 0VDC Is voltage at 64 terminal of the Micom normal 5VDC Is rating voltage 10 range applied to the primary side of the power transformer Check linkage between power cord and terminal tap Check fuse Is 14 18VAC appear in the secondary side of the power transformer Replace power transformer YES NO YES NO YES YES YES NO YES YES YES DC5V 10ms 10ms 100ns NO NO OK YES YES YES Y...

Page 10: ... the power cord should be reconnected within five seconds Does the operating lamp Green blink Does the Solid State Relay SS71 work properly Is the supply voltage of the fan motor sufficient Test rod location PCB CN73 Condition Fan operate AC 180V Normal voltage YES YES YES NO NO NO Check as in the procedur ÒNO power partsÓ Refer tp page 8 Microcomputer is out of order PCB is out of order PCB shoul...

Page 11: ...r replaced Power relay is out of order Power relay should be replaced PCB should be checked Microcomputer is out of order PCB should be checked Room temperature sensor is out of order Check as in the procedure No Power parts Refer to page 8 YES 3 Is the room sensor normal register 10 C 20 C 30 C 17 96k 12 09k 8 3k Does the timer lamp blink during operation Is the power relay RY71 operated by adjus...

Page 12: ...plug in again in approx 5 seconds Is operating lamp blinking Does operation start when swing button of the remote control unit pushed Voltage at pin 33 36 of micom ICO4 change Squarewave Volatge at pin 10 11 12 13 of IC05 KID65003 change Squarewave UP DOWN louver motor is faulty Driver IC05 KID65003 is faulty Micom IC04 is faulty Normal Check as in the procedure No Power parts Refer to page 8 Y Y ...

Page 13: ... C4375Y or Q602 C1623Y is faulty IR LED CL 1L5EU is faulty Ò Ò sound heard from the indoor unit when ON OFF but ton on the remote control unit pushed Voltage of battery less than 2 5V Remote Control Unit LCD display status of REMOCON normal Voltage at PIN 30 of Remocon Micom change Voltage at collecter of Q601 or Q602 change Voltage at pin 26 of micom IC04 change INDOOR UNIT Micom IC04 is faulty N...

Page 14: ...13 MEMO 1 4 17 01 4 41 PM Page 13 ...

Page 15: ...14 4 Exploded Views and Parts List 4 1 Indoor Unit AM26A1C13 AM18A1C09 1 1 2 3 4 6 2 1 4 1 7 1 9 1 1 1 0 1 3 9 1 9 5 6 7 1 2 8 1 6 1 1 5 1 6 1 8 1 4 17 01 4 41 PM Page 14 ...

Page 16: ... AIR INLET PANEL CENTER DISPLAY GUARD AIR FILTER COVER TERMINAL ASS Y FRONT PANEL ASS Y DISPLAY PCB ASS Y TRAY DRAIN ASS Y STEP MOTOR U D BLADE H ASS Y EVAP ASS Y EVAP SPACER EVAP HOLDER MOTOR ASS Y ASS Y TERMINAL BLOCK MOTOR FAN IN ASS Y C F FAN ASS Y BEARING ASS Y MAIN PCB ASSÕY MAIN PCB THERMISTOR ASS Y CASE CONTROL BODY BUSH ASS Y BACK BODY HOLDER PIPE PLATE HANGER ABS PC PP HIPS ASS Y ASS Y E...

Page 17: ...16 4 2 Outdoor Unit 4 2 1 UM26A1C2 1 2 1 1 1 2 3 7 14 4 9 11 11 1 11 2 10 10 1 10 6 13 13 1 13 5 8 1 8 2 8 3 5 5 1 15 8 6 6 1 6 2 1 4 17 01 4 41 PM Page 16 ...

Page 18: ... BASE MOTOR CABINET SIDE INSUL SIDE CABI ASS Y COVER VALVE COVER CONTROL COVER VALVE ASS Y BASE OUT ASS Y VALVE VALVE PACKED 1 2 VALVE PACKED 1 4 TUBE CAPI C GUARD COND ASS Y CONTROL OUT CASE CONTROL OUT CLIP CAPACITOR C OIL TERMINAL BLOCK C OIL TERMOSTAT ASSÕYPARTITION INSUL PARTITION PARTITION ASSÕY CABI UPPER ASS Y COMP GROMMET ISOLATOR NUT WASHER NUT FLANGE COVER TERMINAL OLP CONDENSER SCREEN ...

Page 19: ...18 4 2 2 UM18A1C2 1 5 1 2 1 4 8 8 3 8 2 8 1 7 9 3 4 2 8 6 5 5 1 1 1 1 10 101 10 6 1 3 1 3 1 1 3 5 1 4 17 01 4 41 PM Page 18 ...

Page 20: ...ER MOTOR FAN OUT BASE MOTOR ASSÕY CABINET SIDE CABI SIDE ASSÕY COVER TERMINAL ASS Y BASE OUT ASS Y VALVE VALVE PACKED 3 8 VALVE PACKED 1 4 TUBE CAPI C GUARD COND ASS Y CONTROL OUT CASE CONTROL CLIP CAPACITOR C OIL TERMINAL BLOCK C OIL THERMOSTAT PARTITION INSUL PARTITION COVER TOP ASS Y COMP GROMMET ISOLATOR NUT WASHER NUT FLANGE COVER TERMINAL OLP CONDENSER SCREEN GUARD SC 90073J FOAM PU AS G F20...

Page 21: ...50 DB93 40179B DB61 40243A DB93 30052L DB93 30067N Description CASE UP CASE LOW DOOR REMOCON COVER BATTERY FILTER REMOCON RUBBER REMOCON INLAY LCD INLAY REMOCON LABEL REMOCON LABEL DOOR SCREW TAP SPRING BATTERY SPRING BATTERY SPRING BATTERY PE BAG ASSÕY PCB REMOCON HOLDER REMOCON ASSÕY REMOCON REMOCON HOLDER Specification ABS ABS ABS ABS PC SILICON PC PC ART 90 ART 90 PH M2 SUS 304 SUS 304 SUS 304...

Page 22: ...000294 3501 001058 DE32 10037A DB93 10560B Description CASE CONTROL ASS Y MAIN PCB ASSÕY MAIN PCB IC MCY THERMISTOR ASSÕY TRANS POWER C FILM POWER RELAY FUSE ASSÕY DISPLAY PCB Specification ABS 94 5V MB89635R 466 103AT AC230V DC17V 300mA CFS 99N 450VAC 155K DI1U DC12V 250V 3 15A EDGE QÕTY AM26A1C13 AM18A1C09 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Remark 1 4 17 01 4 41 PM Page 21 ...

Page 23: ...DISPLAY ÒAÓ CODE NO DB41 10204B 0601 001333 0601 001059 0601 001060 0601 001196 DB32 50027A 2202 000780 2001 000515 2201 000283 0401 000005 DB39 20346A DB61 10091A DB63 10494A DB72 10233A DB72 10220F Specification FR 1 T1 6 W20 L170 LTL 30EHJ ORG GRN SY5511 YEL SM5511 GRN SO5511 ORG PNA4612M XD CA OA 50V 104Z RD 1 8TP 221 J YWLA200 09P CA OA 50V 102Z 1N4148 UL1007 AWG 26 9 PC BLUE ABS BLK FOAM PE ...

Page 24: ...check point Liquid side A B Compressor B Compressor A Heat exchanger Condenser Heat exchanger Evaporator Cross fan Cross fan Propeller fan Operating Condition STD Pressure psi 3 WAY V V Piping Temp ûF Use Temp Condition ûF T1 T2 Indoor Outdoor DB 80 80 67 50 54 61 64 34 39 64 78 Cooling Standard Max over load Low temp 50 54 61 64 34 39 67 67 57 95 115 67 75 75 57 WB WB DB 1 4 17 01 4 41 PM Page 23...

Page 25: ...24 6 Wiring Diagrams 6 1 Indoor Unit 1 4 17 01 4 42 PM Page 24 ...

Page 26: ... 1 BLK NEGRO NOIR NERO 2 RED ROJO ROUGE ROSSO 3 WHT BLANCO BLANC BIANCO 4 YEL AMARILLO JAUNE GIALLO FAN MOTOR 3 5µF 450VAC CAPACITOR COMP MOTOR 25µF 450VAC FAN MOTOR 2 5µF 450VAC CAPACITOR COMP MOTOR 20µF 450VAC UM26A1C2 UM18A1C2 1 4 17 01 4 42 PM Page 25 ...

Page 27: ...27 26 7 Schematic Diagrams 7 1 Indoor Unit ...

Page 28: ...ELECTRONICS 1 31040A 5 CO 4 17 01 3 58 PM Page 2 ...

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