Samsung MH026FNCA service manual Measuring point Normal value, Index Value Remark

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Troubleshooting

4.Checking Display PCB LED if Error code is displayed. See error code table if displayed.

5.Checking DC voltage on each point

Item

Measuring point

Normal value

 

 

 

DC LINK

Q803 E(-)~D101 Cathode (+)

about 1.4 times as much as Power AC Voltage

ex) AC220V 305~310Vdc

 

 

 

 

 

inverter 15V

C803 voltage

14.5V~15.5V

 

 

 

Main control 12V

CN59 pin 1~pin 3

12V~15V

 

 

 

Main control 5V

CN59 pin 1~pin 2

4.75V~5.25V

 

 

 

6. Checking PFC

6.When Input current is over 2.8A PFC circuit will work to control the harmonics of AC current. Checking is measuring DC-LINK voltage.

PFC ON (Compressor is working) : DC LINK voltage is over 300Vdc (AC line >220V ) After starting compressor DC Link voltage is going down because of compressor load.

But in case of 2.8A above , DC link voltage will go up over 300V. This voltage is in proportion to AC input voltage. Current can be monitored with "VIEW MODE".

Press K4 key on the outdoor display PCB for several times to change the display to sensor temperature value. Left 1 digit of the LED is data index and Right 3 digits are the value

Index

Value

Remark

 

 

 

C

Estimated Primary current value from

The unit is 0.1A

Compressor current

 

 

 

 

 

9-15

Samsung Electronics

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Contents Free Joint Multi AIR Conditioner Contents 10-1 Precautions Others Disposing of the unitFeature of Product Product SpecificationsModel Product SpecificationsMH026FNCA Product Specificationscont MH026FECA MH035FECA MH052FECA &#$ %## Qfgn+VGO 176&11470+6Indoor Unit Accessories Accessory and Option SpecificationsQFG0Q Remark Descriptions Code-NoDescriptions Indoor Unit AccessoriescontCable-tie UnitTCKP2NWI1WV Outdoor Unit Accessories$# Cable-tie DB65-10088B Transmitter Unit AccessoriesGuetkrvkqp &J@KKN2JEP124#6+10 +/4 674$1 Abnormal conditions Operating Blue Red IndicatorsBreakaway of Cond MID sensor Remark DisplayOutdoor Unitcont Enter the Option Setup mode Setting Option Setup MethodFeature Feature Display Pressing the ON/OFF button Error ModeUnit operation test-run Technical Bulletin  Table of the option code 5VCPFCTF  Necessary Tools Disassembly and ReassemblyIndoor Unit Procedure RemarkUnlock 3 hooks to fix Panel Front Tray Drain Back-Body Parts Procedure Remark 2 MH026FECA/MH035FECA Parts Procedure Drain Pan Parts Procedure Disassemble if after disassembling the Cabinet Top Motor Parts Procedure 3 MH052FECA Parts Procedure Detach the Motor Wire Connected to PCB and Capacitor Parts Procedure Samsung Electronics Detach the Evaporator from the set Control Samsung Electronics 1 MH050FXCA2A Outdoor UnitSamsung Electronics Detach the Compressor 2 MH080FXCA4A Parts Procedure Remark Use Monkey Spanner TLHK@A@3EASO=J@-=NPOEOP 2CTVU.KUV Samsung Electronics 2 MH052FNCAGuetkrvkqp 5RGEKHKECVKQP 0Q QFG0Q#50# 3 MH026FECA/MH035FECA 50# Parts List4 MH052FECA #55 %#$+$#5 #55 5%%/6         %##    13-1 #$ Wiring Diagram # a @KKN2JEPĠ?KJPMH050FXCA2A MH080FXCA4A Schematic Diagram Mhfeca Main PCBIndoor Unit PCB DiagramMhfnca 02- Ġ&J@KKN2JEP Ġ?KJP@ 4 # $% ‘ + = Q #5 *%#5  *&+ Ġ,QP@KKN2JEPTroubleshooting Reset button Checking and Testing operationsButton K1 times Pipe Checking Operation Auto Addressing ModeMode Function Move dip switch n1 of SW02 Model Type PictureConnected 0=A1=B2=C3=D Installation Test Mode with all indoor units functioningContents Auto address setting Operation case Try-run Check Error Basic Check Flow Fault Diagnosis by SymptomBasic Check Flowcont LED1 Red Always on Checking Outdoor ControllerLED3 Yellow OFF Hardware troubleIndex Value Remark Measuring point Normal valueChecking Temperature sensor -ELAI=P?DEJC  DA?GEJC3PCB Inspection ProcedureIndoor Unit Selecting Area for InstallationOutdoor Unit Remote Control Unit#FFKPITGHTKIGTCPV MH050FXCA2A Connecting Up and Purging the CircuitMH080FXCA4A 10-3-1 MH050FXCA2A Refrigerant Refill10-3-2 MH080FXCA4A Ncuu #VKPUVCNNCVKQP #VUGTXKEG 5#5CA*%8#5C4AOuter diameter Torquekg..cm Fixing Torque Final Torque Flare Nut Fixing Torque10-6-1 MH050FXCA2A Pump down ProcedureRelocation of the air conditioner 10-6-2 MH080FXCA4A 052 O O O Index for Model Name07 / O O O Refrigerating Cycle Diagram Samsung Electronics 11-4 Pressure & Capacity mark Power/HeatCal/s Kcal/h Btu/h Kg . m/s Ib . m/s 544.411-5 Q & a for Non-trouble For Non-trouble Is it possible to install the outdoor unit outside? Class Description Remote controller wont operateCommon sense of refrigeration CleannessAir supplier AirElectronics

MH026FNCA specifications

The Samsung MH026FNCA is an innovative solution designed to meet the diverse needs of residential and commercial spaces. As a part of Samsung's advanced lineup of air conditioning systems, this model exemplifies the brand's commitment to quality, efficiency, and cutting-edge technology. With an array of features, the MH026FNCA stands out as an ideal choice for users seeking reliable climate control in their environments.

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