Samsung MC26AC2X Service Manual

SERVICEManualROOM AIR CONDITIONERINDOOR UNITMC26AC2-07MC26AC2-12OUTDOOR UNITMC26AC2XCONTENTSAIR CONDITIONER1. Precautions2. Product Specifications3. O

3-3Samsung ElectronicsOperating Instructions and Installation8. SWING : BLADE-H is rotated vertically bythe stepping motor.*Memory louver : When ON/OF

Samsung Electronics3-4Caution :It is harmful to the air conditioner if it is used in the following environments: greasy areas (including areas near ma

3-5Samsung ElectronicsOperating Instructions and Installation600mm or more600mm or more100mm or more100mm or moreA-UNITB-UNITOutdoor unit check point1

Operating Instructions and InstallationSamsung Electronics3-63-2-2(a) Fixing the Installation Plate3-2-2(b) Purging the UnitInstallation platePipe h

Operating Instructions and Installation3-7Samsung Electronics3-2-2(c) Connecting the Assembly Cable.1 2 E311(L)2(N)3COME2 E3IndoorunitOutdoorunitEart

1 2 3 1 2 531 2 35AEB1 2 3 1 2 33551 21 2 3 1 2 33551 2Indoor unitOutdoor unitTerminal Block2(N)2(N)1(L)1(L)2(N)3C

Operating Instructions and Installation3-9Samsung ElectronicsGrounding(The parts for this work are optional)• A grounding terminal can be found on th

Operating Instructions and InstallationSamsung Electronics3-103-2-2(f) Air-Purge Procedure1. Connect each assembly pipe to the appropriate valve on

R410ASuspension hookHighpressuregaugeHandwheelFinger tightfittingsConnected tohigh pressuresideVacuumpumpFor mountingother end ofhose whennot in useIN

Samsung ElectronicsOperating Instructions and Installation3-123-2-2(h) Refrigerant Adjustment3-2-2(i) Flare nut fixing torqueClass For installation

1-1Samsung Electronics1. Warning: Prior to repair, disconnect the powercord from the circuit breaker.2. Use proper parts: Use only exact replacement

Operating Instructions and Installation3-13Samsung Electronics3-2-2(j) "Pump down" Procedure• Pump down shall be carried out when an evapor

MEMOSamsung Electronics3-14 DB98_11868A(1)_1 3/3/03 11:17 AM Page 2-18

Samsung Electronics 4-14. Disassembly and Reassembly4-1 Indoor UnitStop operation of the air conditioner and remove the power cord before repairing th

Disassembly and ReassemblySamsung Electronics4-2No Parts Procedure Remark2345Ass’y TrayDrain.Electrical Parts(Main PCB)HeatExchangerFan Motor andCross

Samsung Electronics 4-34-2 Outdoor UnitNo Parts Procedure Remark12CabinetFan Motor&Propeller Fan1) Turn off the unit and remove the powercable.2)

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5-1Samsung Electronics1) The input voltage should be rating voltage ±10% range. The airconditioner may not operate properly if the voltage is out of t

Samsung Electronics5-25-2 Fault Diagnosis by Symptom5-2-1 No Power (completely dead)-Initial diagnosis1) Checklist :(1) Is input voltage normal? (2) I

5-3Samsung ElectronicsTroubleshooting5-2-2 When the power is not applied(Outdoor unit)1) Checklist :(1) Is the voltage of the power normal? (The rati

Samsung Electronics5-4Troubleshooting5-2-3 When the Indoor Unit Fan Does Not Operate. (Initial Diagnosis)1) Checklist :(1) Is the indoor unit fan moto

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Samsung Electronics 5-5Troubleshooting5-2-4 When the Outdoor Unit Does Not Operate. (Initial Diagnosis)1) Checklist :(1) Is input voltage normal? (The

Samsung Electronics5-6Troubleshooting(2) Procedures for checking the outdoor unit.Turn off the power, and then turn on thepower in 5 seconds.Does the

5-7Samsung ElectronicsTroubleshooting5-2-5 When the Outdoor Unit Does Not Operate. (Initial Diagnosis)1) Checklist :(1) Is input voltage normal?(2) Is

TroubleshootingSamsung Electronics5-85-2-6 When the UP/DOWN Louver Moter Does Not Operate. (Initial Diagnosis)1) Checklist :(1) Is input voltage norma

5-9Samsung ElectronicsTroubleshooting5-2-8 If Operation By Remote Control Unit Is Impossible. (Initial Diagnosis)1) Troubleshooting procedureRemove po

TroubleshootingSamsung Electronics5-105-2-9 When the SV-BY is Malfunctioning (Outdoor Unit)1) Checklist :(1) Is the SV1 under normal operating condit

Troubleshooting5-11Samsung Electronics(2) When all of the indoor units (B & C) are turned offTurn off the outdoor power, and then turn on the powe

TroubleshootingSamsung Electronics5-125-2-10 When the SV-B is malfunctioning1) Checklist :(1) Is the SV-B under normal operating condition?(2) Is the

Samsung ElectronicsTroubleshooting5-135-2-11 When the SV-C is malfunctioning1) Checklist :(1) Is the SV-C under normal operating condition?(2) Is the

TroubleshootingSamsung Electronics5-14Turn off the outdoor power, and then turn on the power in 5 seconds.Are the SVA and SVB operate turned off after

2-1Samsung Electronics2. Product Specifications2-1 TablekWCooling BTU/hKcal/hDehumidifying \/hAir volume m3/minNoise dBPower ø-V-HzPower Consumption

5-15Samsung Electronics5-3 PCB Inspection5-3-1 Cautions for Part Replacement5-3-2 ProcedureThe parts should be replaced in the following procedure.1.

TroubleshootingSamsung Electronics5-165-3-3 Detailed ProcedureNo.123MalfunctionPull out the power plug fromthe AC terminal and confirmthe fuse on the

5-17Samsung Electronics5-4 Fault Diagnosis of Major PartsPartsTemp.SensorHeat ex. SensorIndoor Fan MotorOutdoor Fan MotorStepping Motor(UP/DOWN swing

Samsung Electronics5-18• It is necessary to set up option code after replacing the main-PCB as a service parts.Make sure that you can set up the optio

Troubleshooting5-19Samsung Electronics! If the first number is , it is correct otherwise press until appear.@ When pressing the button ~ appear on

TroubleshootingSamsung Electronics5-20<Table of the option code>MODELMC26AC2-07MC26AC2-12OPTION CODE020000-1000D9020000-100340 DB98_11868A(1)_1

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Samsung Electronics6-16. Exploded Views and Parts List6-1 Indoor Unit1916142497234356212281217 182513-413-313-21313-11110211520-120-520-42020-620-6-12

6-2Samsung ElectronicsExploded Views and Parts List Parts ListQ’TYRemarkCODE NONo. DescriptionMC26AC2-12 MC26AC2-071234567891011121313-113-213-313-413

Samsung Electronics6-36-2 Outdoor Unit121882543110141516(16-1)9(9-1~9-2)17(17-1~17-4)13(13-1~13-6)1119(19-1~19-7)76 DB98_11868A(1)_2 3/3/03 11:21 AM

245165790Airin(Front view)(Remote control)Air outInstallation plate2245115Samsung Electronics2-22-2 Dimensions2-2-1 Indoor Unit(Unit : mm) DB98_11868A

Exploded Views and Parts List6-4Samsung Electronics Parts ListSpecificationMC26AC2X1 DB90-01006A ASSY CABI FRONT ASS'Y 1 2 DB90-20207A ASSY BASE

Samsung Electronics6-56-3 ASS’Y Remote Control : DB93-00251K1245637 Parts ListNo1234567DescriptionINLAY LCDCASE TOPLCDKEY RUBBERASS'Y PCB REMOCON

6-6Samsung Electronics Parts ListNo1234567891011DescriptionHOLDER CONTROLASSY MAIN PCBTERMINAL BLOCK ASSYASS'Y DISPLAY PCBCONNECTOR WIRE PCB U/DH

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7-1Samsung Electronics7. Block Diagrams7-1 Refrigerating Cycle Block DiagramINDOOR UNIT OUTDOOR UNIT DB98_11868A(1)_2 3/3/03 11:21 AM Page 2-7

Samsung Electronics8-18. PCB Diagrams8-1 ASS’Y MAIN PCB : DB93-01018A TOP PATTERN DB98_11868A(1)_2 3/3/03 11:21 AM Page 2-8

8-2Samsung ElectronicsPCB Diagrams Parts ListNo12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455IC

Samsung Electronics8-3 BOTTOM PATTERNPCB Diagrams DB98_11868A(1)_2 3/3/03 11:22 AM Page 2-10

8-4Samsung Electronics8-2 PCB OUTDOOR UNIT : PE-M3000-02 DB98_11868A(1)_2 3/3/03 11:22 AM Page 2-11

Samsung Electronics8-5PCB Diagrams Parts ListSpecificationJUMP-WIREJUMP-WIREC-CERAMICC-CERAMICC-CERAMICDIODE-RECTR-CARBONR-CARBONR-CARBONR-CARBONR-CAR

2-3Samsung ElectronicsProduct Specifications2-2-2 Outdoor Unit(Unit : mm)(Front view) (Rear view)6601000340796310 DB98_11868A(1)_1 3/3/03 11:17 AM P

Samsung Electronics 8-6 Parts ListNo12345678910DescrptionPCB-DISPLAYMODULE REMOCONTACT SWITCHC-CERAMICC-CERAMICDIODE SWITCHINGR-CARBONJUMPCONNECTOR WA

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9-1Samsung Electronics9. Wiring Diagrams9-1 Indoor Unit DB98_11868A(1)_2 3/3/03 11:22 AM Page 2-15

Samsung Electronics9-29-2 Outdoor Unit DB98_11868A(1)_2 3/3/03 11:22 AM Page 2-16

10-1Samsung Electronics10. Schematic Diagrams10-1 Indoor Unit DB98_11868A(1)_2 3/3/03 11:22 AM Page 2-17

UPDATE LOG SHEETApplication date Page Part# Note(Cause & Solution) S/Bulletin#Use this page to keep any special servicing information. (Service Bu

ELECTRONICS© Samsung Electronics Co., Ltd. Mar. 2003.Printed in Korea.Code No. DB98-11868A(1) DB98_11868A(1)_cover 3/3/03 11:16 AM Page 2

10987620 30Outdoor drybulb temperature [deg C]Low Pressure [kg/cm2G]4030.6/22.527/1921.5/14.6111098720 30Outdoor drybulb temperature [deg C]Low Pressu

3-1Samsung Electronics3. Operating Instructions and Installation3-1 Operating InstructionsEach time you press this buttonMode is changed in the follow

Operating Instructions and InstallationSamsung Electronics3-21. AUTO MODE : In this mode, operationCOOL mode is selected automatically bythe room tem