Manuals / Samsung / Household Appliance / Air Conditioner

Samsung MH026FNCA 9-3-3Checking Indoor controller, 9-3-5Checking Temperature sensor, 9-16

Models: MH026FNCA

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Troubleshooting

9-3-3 Checking Indoor controller

9-3-4 Checking Power cable and Communication cable

See 12-2 "Checking and Testing operations" and installation manual.

9-3-5 Checking Temperature sensor

See 12-5 "Fault Diagnosis of Major Parts".

In case of a sensor in outdoor unit, temperature can be monitored with "VIEW MODE".

Press K4 key on the outdoor display PCB for several time to change the display to sensor temperature value. Left 1 digit of the LED is data index and Right 2 digits are the value.

Index	Value	Remark

8	Discharge sensor temperature

9	OLP sensor temperature	The unit is degree C
		The unit is degree C
A	Condenser sensor temperature

B	Outdoor sensor temperature

Samsung Electronics

9-16

Page 86

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Samsung MH026FNCA 9-3-3Checking Indoor controller, 9-3-4Checking Power cable and Communication cable, Samsung Electronics

Contents

Convenient Installation INDOOR UNITTHE FEATURE OF PRODUCT FREE JOINT MULTI AIR CONDITIONERContents Contents 10-111-1 9-121-2Power supply and circuit breaker 1. Precautions1-1Installing the air conditioner 1-3During operationSamsung Electronics 1-4Disposing of the unit1-5Others Convenient Installation 2. Product Specifications2-1The Feature of Product Inverter for High Efficiency OperationMH026FNCA 2-2Product SpecificationsModel ItemProduct Specificationscont Samsung ElectronicsMH026FECA Product SpecificationscontModel MH035FECAQFGN Product SpecificationscontSamsung Electronics :&#$MHFNCA 2-3Accessory and Option Specifications2-3-1Indoor Unit Accessories +VGOItem Indoor Unit AccessoriescontMHFECA DescriptionsItem Indoor Unit AccessoriescontMHFECAcont Descriptions+VGO 2-3-2Outdoor Unit AccessoriesMH050FXCA2A/MH080FXCA4A &GUETKRVKQPU2-3-3Transmitter Unit Accessories Item&J@KKN2JEP HECJIAJP=J@@FQOPIAJPONNKNIK@A=J@?DA?GIAPDK@ +PFKECVQTUMHFECA Samsung ElectronicsAlignment and Adjustments MHFECAcont3-1-2Outdoor Unit Samsung ElectronicsOutdoor Unitcont ex Option No 3-2Setting Option Setup MethodStep 1 : Enter the Option Setup mode Alignment and Adjustments Step 4 : Pressing the ON/OFF button • Error ModeSamsung Electronics Step 5 : Unit operation test-runOption Code Procedure for MH Neo Forte TECHNICAL BULLETINOPTION CODE Table of the option codeMODEL Item 4. Disassembly and ReassemblyNecessary Tools RemarkProcedure 4-1Indoor Unit4-1-1MH026FNCA/MH035FNCA/MH052FNCA RemarkRemark ProcedureSamsung Electronics Remark ProcedureParts Remark 4-1-2MH026FECA/MH035FECAProcedure PartsUnscrew a screw ProcedureParts 6Disassemble the band Motor for fixing the MotorRemark ProcedureSamsung Electronics 1 Disassemble the Cabinet Top Evap1-3and the Drain Pan 2-1, 2-2, ProcedureParts Parts ProcedureSamsung Electronics Parts ProcedureDisassembly and Reassembly Disassemble if after disassembling the case PCBSamsung Electronics 4-1-3MH052FECAProcedure 4-11Blower & Motor ProcedureParts 4-13 ProcedureSamsung Electronics PartsParts ProcedureDisassembly and Reassembly Drain Pan4-15 ProcedureSamsung Electronics PartsParts Procedure1Detach all the wires connected to the PCB Remark4-17 ProcedureSamsung Electronics PartsProcedure 4-2Outdoor Unit4-2-1MH050FXCA2A Remark4-19 ProcedureSamsung Electronics PartsRelease the refrigerant at first ProcedureRemark Samsung Electronics 4-2-2MH080FXCA4AProcedure 4-21Parts ProcedureDisassembly and Reassembly RemarkRemark Samsung Electronics4-23 *%#+ *%#+ TLHK@A@3EASO=J@-=NPOEOP&J@KKN2JEP %QFG0Q 2CTVU.KUV5COUWPINGEVTQPKEU &GUETKRVKQPSamsung Electronics 5-1-2MH052FNCA6 7 2CTVU.KUV 5COUWPINGEVTQPKEU2 17 18 16 5-1-3MH026FECA/MH035FECAExploded Views and Parts List 19 21Parts List Samsung Electronics2 2 8 2 5-1-4MH052FECAExploded Views and Parts List 10 9 6Parts List Samsung Electronics11 12 3 1 5-2Outdoor Unit5-2-1MH050FXCA2A 85-10 2CTVU.KUVSamsung Electronics 1 14 5-2-2MH080FXCA4A56 10 20 4 13 15 2 5-12 Parts ListSamsung Electronics MHFNCA 6. Wiring Diagram6-1Indoor Unit &J@KKN2JEPĠ?KJP %# A6-2Outdoor Unit MH050FXCA2AMH080FXCA4A Samsung ElectronicsMHFNCA 7. Schematic Diagram7-1Indoor Unit MHFECA Samsung ElectronicsMHFNCA 8. PCB Diagram8-1MAIN PCBIndoor Unit Samsung Electronics 02- Ġ&J@KKN2JEP Ġ?KJPMHFNCA MHFECA 5 6 7 8 9 02QYGT0 *&+ - Ġ,QP@KKN2JEP%#5 *%#5 2QYGT9. Troubleshooting 9-1Items to be checked firstReset button 9-2Checking and Testing operations2. Settings of PCB Display of the Outdoor unit Samsung Electronics2.2.Apply the power to the outdoor unit Samsung Electronics Switch Setting and Testing Operation In case of MANUAL ADDRESSING modeSamsung Electronics Switch Setting and Testing Operation contSWITCH “SW02 ” TYPECool mode try-run :Pushthe K2 button three times Switch Setting and Testing Operation contPlease do cool mode try-runor heat mode try run Heat mode try-run :Pushthe K2 button onceManaul address setting Samsung ElectronicsAuto address setting Address setting another case9-10 Operation caseSamsung Electronics Try-runCheck Error 9-3Fault Diagnosis by Symptom 9-3-1Basic Check Flow9-13 Basic Check FlowcontTroubleshooting Samsung Electronics9-14 9-3-2Checking Outdoor ControllerSamsung Electronics LED1 Red : ALWAYS ON5.Checking DC voltage on each point 9-3-3Checking Indoor controller 9-3-4Checking Power cable and Communication cable9-3-5Checking Temperature sensor Samsung Electronics5GGCWNV&KCIPQUKUQH/CLQT2CTVU DA?GEJC3-ELAI=P?DEJC %WTTGPV8UVGRXCNWGECPOQPKVQTGFYKVJ8+9/1&9-4PCB Inspection 9-4-1Cautions for Part Replacement9-4-2Procedure 10-1-1Indoor Unit 10. Reference for Installation10-1Selecting Area for Installation Samsung Electronics 10-1-3Remote Control Unit10-1-2Outdoor Unit 10-210-2Connecting Up and Purging the Circuit MH050FXCA2A10-4 MH080FXCA4ASamsung Electronics 10-3Refrigerant Refill 10-3-1MH050FXCA2A10-6 10-3-2MH080FXCA4ASamsung Electronics /ABNECAN=JP@FQOPIAJP %5#5CA*%8#5C4A10-8 10-5Flare Nut Fixing TorqueSamsung Electronics 10-6Pump down Procedure 10-6-1MH050FXCA2A10-10 10-6-2MH080FXCA4ASamsung Electronics FREEJOINTMULTIFOREUROPE 11. Reference Information11-1Index for Model Name 4 A / O O O07 / O O O Index for Model Name contFREEJOINTMULTIFOREUROPE Product Type11-3 11-2Refrigerating Cycle DiagramMH050FXCA2A Samsung Electronics11-4 MH080FXCA4ASamsung Electronics Reference InformationPower/Heat 11-3Pressure & Capacity mark11-6 11-5Q & A for Non-troubleSamsung Electronics Q & A for Non-troublecont 11-8 Q & A for Non-troublecontSamsung Electronics Air supplier? 11-6Common sense of refrigeration11-6-1Air supplier Effectiveness of air supplierGSPNGlobal Service Partner Network ELECTRONICS