Samsung MH026FNCA Service Manual
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Samsung MH026FNCA Service Manual

Free joint multi air conditioner indoor/outdoor unit
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See also: Service Manual , Installation Manual
SERVICE
AIR CONDITIONER
Refer to the service manual in the GSPN(see the rear cover) for the more information.
FREE JOINT MULTI AIR CONDITIONER
INDOOR UNIT
OUTDOOR UNIT
MH026FNCA
MH050FXCA2A
MH035FNCA
MH080FXCA4A
MH052FNCA
MH026FECA
MH035FECA
MH052FECA
Manual
THE FEATURE OF PRODUCT
■
Multi Inverter(Free Joint Multi) Series
– Variable Indoor Unit Combination(Free Joint Multi)
– Multi Inverter(Free Joint Multi) Series delivers
comfort to 2~4 rooms with a Single Outdoor Unit
– Smart & Low noise outdoor units in any condition.
■
Energy Saving
– High Efficiency DC inverter and BLDC Comp.
– Smart Inverter Control algorithm.
– TBR Sine-Wave Compressor & Sine Wave Controller.
■
Convenient Installation
– 485 non Polarity / Auto addressing
– Easy checking system condition by 7-segment
■
Space Saving & Environmental Friendly
– Compact & Light Outdoor Unit
– Slim and Quiet Indoor Units

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Summary of Contents for Samsung MH026FNCA

  • Page 1 FREE JOINT MULTI AIR CONDITIONER INDOOR UNIT OUTDOOR UNIT MH026FNCA MH050FXCA2A MH035FNCA MH080FXCA4A MH052FNCA MH026FECA MH035FECA MH052FECA SERVICE Manual AIR CONDITIONER THE FEATURE OF PRODUCT ■ Multi Inverter(Free Joint Multi) Series – Variable Indoor Unit Combination(Free Joint Multi) – Multi Inverter(Free Joint Multi) Series delivers comfort to 2~4 rooms with a Single Outdoor Unit –...

  • Page 2: Table Of Contents

    Contents 1. Precautions 1-1 ............................1-1 Installing the air conditioner 1-1 ......................1-2 Power supply and circuit breaker 1-1 ....................1-3 During operation ..........................1-1 1-4 Disposing of the unit 1-2 ........................1-5 Others 1-2 ..............................2. Product Specifications 2-1 ......................
  • Page 3 Contents 9. Troubleshooting 9-1 ..........................9-1 Items to be checked first 9-1 ........................ 9-2 Checking and Testing operations 9-2 ....................9-3 Fault Diagnosis by Symptom ....................... 9-12 9-4 PCB Inspection 9-18 ........................... 10. Reference for Installation 10-1 ....................... 10-1 Selecting Area for Installation 10-1 ....................

  • Page 4: Precautions

    Do not place a cloth or other materials over it. ● Remove the batteries if you don’t use the remote control for a long time. (If applicable) ● Use the remote control within 23ft(7m) from the indoor unit. (If applicable) Samsung Electronics...

  • Page 5: Disposing Of The Unit

    ● Young children or infirm persons should be always supervised when they use the air conditioner. ● Max current is measured according to IEC standard for safety. ● Current is measured according to ISO standard for energy efficiency. Samsung Electronics...

  • Page 6: Product Specifications

    • Felt Structure : New felt has selected to reduce the noise coming out of the compressor. Double layered felt structure absorbs noise by two times and felt is also covering top of the compressor to reduce the noise even more. Samsung Electronics...
  • Page 7 2-2 Product Specifications Model MH026FNCA MH035FNCA Item INDOOR UNIT Type Wall-mounted Wall-mounted Cooling 9,000 12,000 Btu/hr 10,000 13,000 Heating Dehumidifying Cooling 8.31 9.54 Perfor- Air Volume /min mance Heating 8.56 9.93 Cooling Noise Heating Power ø,V,Hz 1,208~230,60 1,208~230,60 Cooling Power Consumption...

  • Page 8: Product Specifications

    Operating Current 0.30 Heating 1,065x298x128 WxHxD Outer Dimension inch 42x12x8.6 Weight Liquid OD(inch)xL(ft) ø1/4x24.6 Refrigerant Pipe ø1/2x24.6 Size OD(inch)xL(ft) Drain Hose DxL(mm) ø18x600 Type Cross-fan Blower Type Resin /steel Motor Rated Output Heat Exchanger 2ROW 16STEP Refrigerant Control Unit Samsung Electronics...
  • Page 9 Liquid OD(inch)xL(ft) ø1/4x24.6 ø1/4x24.6 ø1/4x24.6 Refrigerant Pipe Size OD(inch)xL(ft) ø3/8x24.6 ø3/8x24.6 ø1/2x24.6 Sirocco fan Sirocco fan Sirocco fan Type Blower Type Resin/steel Resin/steel Resin/steel Motor Rated Output Heat Exchanger 2ROW 12STEP 2ROW 12STEP 2ROW 12STEP Refrigerant Control Unit Samsung Electronics...

  • Page 10: Samsung Electronics

    ZZ 5K\G 9GKIJV 6[RG 6YKP4QVCT[ 6YKP4QVCT[ /QFGN0COG )6(7#'9 )6(7#'9 /QVQT 6[RG $.&%2GTOCPGPVOCIPGVKE/QVQT $.&%2GTOCPGPVOCIPGVKE/QVQT %QO RTGUUQT 6[RG .WDTKECPV1KN %CRCEKV[ 2TQVGEVKQP&GXKEG 6[RG 2TQRGNNGT 2TQRGNNGT $NQYGT (CP/QVQT 5K\G 1& OO Z. O Ó Ó $NQYGT /QVQT 4CVGF1WVRWV *GCV'ZEJCPIGT 41956'2 41956'2 4GHTKIGTCPV%QPVTQN&GXKEG %JCTIKPI4GHTKIGTCPV 4#   Samsung Electronics...

  • Page 11: Accessory And Option Specifications

    2-3 Accessory and Option Specifications 2-3-1 Indoor Unit Accessories ■ MH✳✳✳FNCA +VGO &GUETKRVKQPU %QFG0Q 3 6; 4GOCTM &$$ /*(0%#/*(0%# +PUVCNNCVKQP2NCVG 2NCVG*CPIGT &$# /*(0%# 4GOQVG%QPVTQN &$3 +PFQQT 7PKV 7UGT/CPWCN &$# +PUVCNNCVKQP/CPWCN &$# 6JGFGUKIPCPFUJCRGECPDGEJCPIGFCEEQTFKPIVQVJGOQFGN Samsung Electronics...
  • Page 12 Pattern Sheet DB97-03906A/B Insulation-Install Outlet DB72-00143D Insulation-Install Inlet DB72-00143E Indoor Unit Drain Hose Joint DB94-00758A Rubber DB63-00237A (Grommet Hanger) Insulation-Drain Out DB62-03439H Insulation-Out DB62-03439J Insulation-Drain In DB62-03440H ✳ The design and shape can be changed according to the model. Samsung Electronics...
  • Page 13 Product Specifications Indoor Unit Accessories(cont.) ■ MH✳✳✳FECA(cont.) Item Descriptions Code-No. Q'TY Remark Cable-tie DB65-10088C Indoor Unit Drain Pipe Holder DB90-02064A ✳ The design and shape can be changed according to the model. Samsung Electronics...
  • Page 14 Product Specifications 2-3-2 Outdoor Unit Accessories ■ MH050FXCA2A/MH080FXCA4A +VGO &GUETKRVKQPU %QFG0Q 3 6; 4GOCTM &TCKP2NWI1WV &$# 6TCPUOKVVGTRQYGTECDNG &$# #UU [%QPPGEVQT9KTG&%2QYGT 4WDDGT.GI &$# 1WVFQQT 7PKV +PUVCNNCVKQP/CPWCN &$# 5GTXKEG/CPWCN &$# 0KRRNG%QPPGEVQT &$# /*(:%## 6JGFGUKIPCPFUJCRGECPDGEJCPIGFCEEQTFKPIVQVJGOQFGN Samsung Electronics...
  • Page 15 DB39-00378E (Wire Harness-DC Source) (MIM-B13) Transmitter communication cable DB39-00253B (Connect Wire-COM) (MIM-B13) Transmitter Case DB61-00450B (Case-Relay PCB Out) (MIM-B13) Cable-tie DB65-10088B DB98-25776A Installation Manual (MIM-B13) ✳ The design and shape can be changed according to the model. 2-10 Samsung Electronics...
  • Page 16 HECJIAJP=J@@FQOPIAJPO "NNKNIK@A=J@?DA?GIAPDK@ &J@KKN2JEP (0%# +PFKECVQTU &GUETKRVKQP 12'4#6+10 6+/'4 674$1 /CKP%JGEMKPI2QKPV +PFQQTWPKVTQQOVGORGTCVWTGUGPUQTGTTQT QRGPQTUJQTV  +PFQQTWPKVJGCVGZEJCPIGTVGORGTCVWTGUGPUQTGTTQT QRGPQTUJQTV  +PFQQTHCPOQVQTOCNHWPEVKQP 1RVKQP5GVVKPI ''241/GTTQT 1RVKQPGTTQT 1RVKQP5GVVKPI QRVKQPYCUPVUGVWRQTQRVKQPFCVCGTTQT  4GOQVG%QPVTQNQPQHH 1WVFQQTWPKVGTTQT 1WVFQQT7PKV2QYGT4GUGV Samsung Electronics...

  • Page 17: Alignment And Adjustments

    : Off ◆ If you turn off the air conditioner when the LED is flickering, the LED is also turned off. ◆ If you re-operate the air conditioner, it operates normally at first, then detect an error again. Samsung Electronics...
  • Page 18 : Off ◆ If you turn off the air conditioner when the LED is flickering, the LED is also turned off. ◆ If you re-operate the air conditioner, it operates normally at first, then detect an error again. Samsung Electronics...
  • Page 19 Outdoor unit sensor error - Condenser out sensor(Short/Open) - Self diagnosis Compressor Discharge temperature sensor error Compressor discharge sensor detached - Self diagnosis Compressor OLP sensor error (Short/Open) - Error condition : outdoor temperature under -20˚C - Error level : over 4.95V(-30˚C) under 0.5V(151˚C) Samsung Electronics...
  • Page 20 DC peak error (IPM Over Current) Compressor Limit Error DC link Voltage error (under 150V, over 410V) Abnormal compressor running (Compressor Rotation Error) Current sensor error DC link Voltage sensor error OTP Error Inverter micom zero-crossing error Piping(gas leak) NO GAS error(self diagnosis) Samsung Electronics...

  • Page 21: Setting Option Setup Method

    Every time you push the button, the display panel reads . . . repeatedly. Setting Option SEG4. Push the button to set the display panel to Every time you push the button, the display panel reads . . . repeatedly. Samsung Electronics...
  • Page 22 Every time you push the button, the display panel reads . . . repeatedly. Setting Option SEG10. Push the button to set the display panel to Every time you push the button, the display panel reads . . . repeatedly. Samsung Electronics...
  • Page 23 If all lamps of indoor unit are flickering, Plug out, plug in power plug again and press ON/OFF key to retry. If the unit is not working properly or all lamps are continuously flickering after setting the option code, see if the correct option code is set up for its model. Samsung Electronics...

  • Page 24: Option Code Procedure For Mh Neo Forte

    TECHNICAL BULLETIN Technical Bulletins are produced to provide information not contained in the manuals or to update currently published technical information on the Samsung line of Mini splits published technical information on the Samsung line of Mini splits This bulletin is on :...
  • Page 25 Alignment and Adjustments ■ Table of the option code MODEL OPTION CODE MH026FNCA 027402-14221A-200001-300000 MH035FNCA 027402-16224d-200001-300000 MH052FNCA 026402-19228F-200001-300000 'ZVGTPCN5VCVKE2TGUUWTG  5VCPFCTF OO#S & (  ) /*('%#     )   &( /*('%#     1&...

  • Page 26: Disassembly And Reassembly

    4. Disassembly and Reassembly ■ Necessary Tools Item Remark +SCREW DRIVER MONKEY SPANNER Samsung Electronics...

  • Page 27: Indoor Unit

    4-1 Indoor Unit Stop operation of the air conditioner and remove the power cord before repairing the unit. 4-1-1 MH026FNCA/MH035FNCA/MH052FNCA Parts Procedure Remark 1) Stop the air conditioner operation and Front Grille shut off the main power. 2) Open the Front Grille by pulling right and left sides of the hook.
  • Page 28 1) Take all the connector of PCB upper Control-In side out. (Inclusion Power Cord) (Main PCB) 2) Detach the outdoor unit connection wirefrom the Terminal Block. 3) Loosen 4 fixing screws of Ass’y Control-In. Tray Drain 1) Pull Tray Drain out from the Back Body. Samsung Electronics...
  • Page 29 5) Lifting the Heat Exchanger up a little to push the up side for separation from the indoor unit. 1) Loosen the fixing screw. Fan Motor 2) Detach the Fan Motor from the Fan. & 3) Detach the Fan From the left Holder Cross Fan Bearing. Samsung Electronics...
  • Page 30 1) Disassemble the Cabinet Top Motor. Motor & - Unscrew 8 screws Blower 2) Disassemble 2 Cover Blower Uppers. - After unscrewing 2 screws - Disassemble the Cover Blower Upper with pushing its hook. 3) Disassemble the Cover Control. - Unscrew 2 screws Samsung Electronics...
  • Page 31 Partition. - Unscrew a screw 6) Disassemble the band Motor for fixing the Motor. - Unscrew 2 screws 7) After disassembling the Motor and Blower for the set, disassemble the Blower by use of 3mm wrench. Samsung Electronics...
  • Page 32 1) Disassemble the Cabinet Top Evap. Drain Pan - Unscrew 11 screws 2) Disassemble the Bracket Outlet Sub that fixes the Drain Pan equipped on the front of the set. - Unscrew 6 screws 3) Disassemble the Drain Cushion from the set. Samsung Electronics...
  • Page 33 Inlet air temperature sensor, and EEV wire that connected to the inside of PCB. 3) Disassemble the Support Evap. LF that fixes the Evaporator. - Unscrew 2 screws 4) Disassemble the Support Evap RH. - Unscrew 2 screws Samsung Electronics...
  • Page 34 Case. 4) In case of disassembling the Case Control, disassemble the Case Control from the set after unscrewing the screw connected to the direction of Blower. - Disassemble if after disassembling the Cabinet Top Motor 1-1). Samsung Electronics...
  • Page 35 5) In case of disassembling the Trans Power, unscrew the screw fixing on the Case. ✳ Disassemble if after disassembling the case PCB 4-4). 1) Disassemble the Bracket Outlet Bracket Outlet assembled on the Cabinet. - Unscrew 10 screws 4-10 Samsung Electronics...
  • Page 36 Disassembly and Reassembly 4-1-3 MH052FECA Parts Procedure Remark 1) Pull out the Filter as picture 1 or picture 2. Filter 2) If it is necessary, after disassembling 8 indicating screws, detach the Bracket Filter. Samsung Electronics 4-11...
  • Page 37 1) After disassembling 13 indicating screws, Blower detach Ass’y Cabinet-Top Motor. & Motor 2) After disassembling 3 indicating screws, detach Ass’y Case Blower Upper. _ Press the pothook of the Case Blower and detach Ass’y Case Blower Upper. 4-12 Samsung Electronics...
  • Page 38 Cover Control. 4) Detach the Motor Wire Connected to PCB and Capacitor. 5) After disassembling the indicating screws, detach the wire connected to the Partition. 6) After disassembling 2 indicating screws, detach the Ass’y Band Motor. Samsung Electronics 4-13...
  • Page 39 Blowers, detach the Blowers from the axis of the Motor by 3mm inner hexagon spanner. Drain Pan 1) After disassembling 15 indicating screws, detach Ass’y Cabinet-Top Evap. 2) After disassembling 6 indicating screws, detach the Bracket Outlet. 3) Detach the Drain Pan. 4-14 Samsung Electronics...
  • Page 40 1) After disassembling 2 indicating screws, detach Ass'y Cover Pipe. 2) Detach the Sensor from the Control Box.(including 2 Sensors) 3) After disassembling 2 indicating screws, detach Ass'y Support Evap LF. 4) After disassembling 2 indicating screws, detach Ass'y Support Evap RH. Samsung Electronics 4-15...
  • Page 41 3) If only the disassembly of Capacitor is required, detach it from the set. 4) If only the disassembly of Case Control is required, detach it from the set after disassembling 2 indicating screws. 4-16 Samsung Electronics...
  • Page 42 Disassembly and Reassembly Parts Procedure Remark 5) Detach the Transformer after disassembling 2 indicating screws. ✳ Work is possible after disassembling the Case PCB. 1) After disassembling 16 indicating screws, Ass'y Bracket detach Ass'y Bracket Outlet. Outlet Samsung Electronics 4-17...

  • Page 43: Outdoor Unit

    5) Loosen 2 fixing screws, 5 bolts and detach the Front Cabinet. (Use +Screw Driver.) 6) Loosen 2 fixing screws and pull up the Control Box. (Use +Screw Driver.) 7) Loosen 9 fixing screws and detach the Cabinet Side. (Use +Screw Driver.) 4-18 Samsung Electronics...
  • Page 44 1) Loosen the fixing nut and detach the Fan. (Use +Screw Driver.) & Motor 2) Loosen 4 fixing bolts and detach the Motor. (Use +Screw Driver.) 3) Loosen 4 fixing bolts and detach the Bracket Motor. (Use +Screw Driver.) Samsung Electronics 4-19...
  • Page 45 2) Disassemble the Inlet and Outlet Pipe by & Compressor welding. 3) Loosen the fixing screws of the Heat Exchanger. (Use +Screw Driver.) 4) Detach the Heat Exchanger. 5) Loosen 3 nuts of the Compressor. (Use Monkey Spanner.) 6) Detach the Compressor. 4-20 Samsung Electronics...
  • Page 46 3) Loosen 2 fixing screws of the Ass'y Control Out. (Use +Screw Driver.) 4) Loosen 6 fixing screws and detach the Cabinet Upper. (Use +Screw Driver.) 5) Loosen 2 fixing screws, 7 bolts and detach the Cabinet Front. (Use +Screw Driver.) Samsung Electronics 4-21...
  • Page 47 Disassembly and Reassembly Parts Procedure Remark 6) Loosen 2 fixing screw and pull up the Control Box. (Use +Screw Driver.) 7) Pull the felt and detach it. 8) Detach the Terminal Cover and detach the comp lead wire. 4-22 Samsung Electronics...
  • Page 48 2) Disassemble the Inlet and Outlet Pipe by & Compressor welding. 3) Loosen the fixing screw of the Heat Exchanger. (Use +Screw Driver.) 4) Detach the Heat Exchanger. 5) Loosen 3 nuts of the Compressor. (Use Monkey Spanner.) 6) Detach the Compressor. Samsung Electronics 4-23...
  • Page 49 "TLHK@A@3EASO=J@-=NPO)EOP &J@KKN2JEP *%#+ *%#+  5COUWPI'NGEVTQPKEU...
  • Page 50 ([SORGHG9LHZVDQG3DUWV/LVW 2CTVU.KUV 3 6; %QFG0Q &GUETKRVKQP 5RGEKHKECVKQP 5# 50# /*(0%# /*(0%# &$, #55 ; $#%-$1&; #55 ; &$* #55 ; $#%-$1&; #55 ; &$& $#%-$1&; *+25 &$# %75*+10$#%-$1&; &$# #55 ; 5722146 '8#2 4* *+25 &$$ #55 ; 5722146 '8#2 4* *+25 &$# /1614+0 8`*\%NCUU' &$# #55 ; %4155(#0 1&Z. &$# #55 ;...
  • Page 51 Exploded Views and Parts List 5-1-2 MH052FNCA 1-2 1-1 2-1 2-2 2-3 3-8 3-6 3-4 5-4 3-1 3-7 3-2 5-2 5-3 3-5 3-3 5-2 5- 5-3 Samsung Electronics...
  • Page 52 &YQMPEFE7JFXTBOE1BSUT-JTU 2CTVU.KUV %QFG0Q &GUETKRVKQP 5RGEKHKECVKQP 5# 50# 3 6; &$$ #55ŏ; $#%-$1&; #55ŏ; &$$ $#%-$1&; *+25 &$# %75*+10$1&; $#%- &$& #55ŏ; '8#2 #55ŏ; &$# %18'4$'#4+0) &$# #55ŏ; 67$''8#2 +0 #55ŏ; &$# #55ŏ; 67$''8#2 176 #55ŏ; &$' #55ŏ; 64#; &4#+0 #55ŏ; &$# 64#;...
  • Page 53 Exploded Views and Parts List 5-1-3 MH026FECA/MH035FECA 23-5 23-6 23-4 23-1 23-7 23-8 23-3 23-2 Samsung Electronics...
  • Page 54  &$% %#5'2%$ #$56  &$# %18'4%10641. 5)%%/6  &$$ *1.&'49+4' 22 $.#%-  &$. 6'4/+0#. $.1%-2 2219'4  &$/ 6'4/+0#. $.1%-2 2%1//70+%#6+10  &$$ 64#05219'4 8*<   %#2#%+614 8z( &$# #55 ; 6*'4/+5614 #55 ; &$# 6*'4/+5614'8#2 #55 ; Samsung Electronics...

  • Page 55: Exploded Views And Parts List

    Exploded Views and Parts List 5-1-4 MH052FECA 30-1 30-6 30-2 30-3 30-4 30-5 5-7 Samsung Electronics...
  • Page 56 #$586   %#2#%+614 87  &$. 6'4/+0#. $.1%-2 2219'4  &$/ 6'4/+0#. $.1%-2 2%1//70+%#6+10  &$) 64#05219'4 *< &$# #55 ; 6*'4/+5614 #55 ; &$# 6*'4/+5614'8#2 OO &$# %.+2 $475* 0;.10$.#%- &$# #55 ; %18'4%10641. #55 ; &$& #55 ; 2%$ #55 ; Samsung Electronics...
  • Page 57 5-2 Outdoor Unit 5-2-1 MH050FXCA2A             Samsung Electronics...
  • Page 58 &$# 2.#6'%10641. 176 722'4  &$$ 2.#6'%10641. 176 /#+0 5)%%/  &$& 6'4/+0#. $.1%-  &$( 6'4/+0#. $.1%-  &$# #55 ;6'4/+0#. $.1%- #55 ;  &$# #55 ; 2%$&+52.#; #55 ; &$# 4'#%614 /*vv8 &$$ 6*'4/+5614%10&'05'4 #6%6$ &$# 6*'4/+5614 #6%6$ Samsung Electronics 5-10...
  • Page 59 Exploded Views and Parts List 5-2-2 MH080FXCA4A           13-1 1-1 5-11 Samsung Electronics...
  • Page 60 %#5'%10641. $#5'  &$# 2.#6'%10641. 176 5)%%/  &$& 6'4/+0#. $.1%-  &$( 6'4/+0#. $.1%-  &$# #55ŏ;6'4/+0#. $.1%- #55ŏ;  &$# #55ŏ; 2%$57$&+52.#; #55ŏ; &$# 4'#%614 #*\ &$$ 6*'4/+5614%10& #6%6$ &$% 6*'4/+56149+4'176&+5%*#4)' #6%6$ &$# $66<+$1'/( #66< Samsung Electronics 5-12...

  • Page 61: Indoor Unit

    6. Wiring Diagram 6-1 Indoor Unit ■ MH✳✳✳FNCA This Document can not be used without Samsung's authorization. Samsung Electronics...
  • Page 62 &J@KKN2JEPĠ?KJP #" A This Document can not be used without Samsung's authorization. Samsung Electronics...
  • Page 63 6-2 Outdoor Unit ■ MH050FXCA2A This Document can not be used without Samsung's authorization. Samsung Electronics...
  • Page 64 Wiring Diagram ■ MH080FXCA4A This Document can not be used without Samsung's authorization. Samsung Electronics...

  • Page 65: Indoor Unit

    7. Schematic Diagram 7-1 Indoor Unit ■ MH✳✳✳FNCA This Document can not be used without Samsung's authorization. Samsung Electronics...
  • Page 66 Schematic Diagram ■ MH✳✳✳FECA This Document can not be used without Samsung's authorization. Samsung Electronics...

  • Page 67: Pcb Diagram

    8. PCB Diagram 8-1 MAIN PCB(Indoor Unit) ■ MH✳✳✳FNCA The red number connecter is not used. & Power Temperature Sensor Motor RPM Feedback Auto Grill Remocon Module HVPS(High voltage Generator) Humidity Sensor BLADE-H Step Motor Anions Display Indoor Fan Motor Samsung Electronics...
  • Page 68 02- Ġ&J@KKN2JEP Ġ?KJP ■ MH✳✳✳FNCA The red number connecter is not used. External Signal MAIN PCB Connection Samsung Electronics...
  • Page 69 Heater Temperature Option Switch Wired Remote Controller Power(12V) Fan (Tap Control) Control Signal Ventilator & Drain Pump “ Display Hot Coil ‘ Operating Check Signal Fan (SSR) HALL IC Trans In Download Main Power COM 1 Trans out Samsung Electronics...
  • Page 70 *&+ - Ġ,QP@KKN2JEP *%#5 *%#5  6JGTGFPWODGTEQPPGEVGTKUPQVWUGF 2QYGT0 %10&1.2 6GORGTCVWTG5GPUQT &+5176 6GORGTCVWTG5GPUQT 2QYGT. $.&%(#0 ''8%QPPGEVQT #%(#0 %QOR%QPPGEVQT9KTG %QOOWPKECVKQP 4GCEVQT%QPPGEVQT9KTG 5COUWPI'NGEVTQPKEU...

  • Page 71: Troubleshooting

    The compressor stops intermittently in a The compressor stops intermittently or the fan speed of the COOL mode or DRY mode, and fan speed of the indoor unit decreases to prevent inside/outside air frozen indoor unit decreases. depending on the inside/outside air temperature. Samsung Electronics...

  • Page 72: Checking And Testing Operations

    T T otal capacity of the indoor units otal capacity of the indoor units Fan RPM (H:high,L:low Fan RPM (H:high,L:low,Blank:of ,Blank:off ) f ) 15 15 Safety control Safety control • The EEV 2 and EEV 3 of MH050FXCA2A model is always displayed as blank. Samsung Electronics...
  • Page 73 • Push [K1 ] button on the display PCB of outdoor unit once, then begins to start “Pipe check operation ” with displaying as below. Button [K1] times DIS 01 DIS 02 Display [DIS 01 ] is flickering on the setting time. Outdoor Temperature 32˚F or more less tha 32˚F Time duration (Cool mode) (Heat mode) 5min~10min 20min~50min Samsung Electronics...
  • Page 74 - On this mode the controller will ignore the manual address number set on the rotary switch on the indoor PCB. - To confirm the indoor address number assigned by this mode, use "TEST MODE" and the address number will be displayed on the LED display on the indoor unit. Samsung Electronics...
  • Page 75 02--communication with indoor unit C; 03--communication with indoor unit D; ✳ In case of Manual address mode,you can do pipe check operation for check whether you connect the pipes correctly or not. But you need set indoor address switch yourselves. Samsung Electronics...
  • Page 76 Troubleshooting Switch Setting and Testing Operation (cont.) TO SET ADDRESSING MANUALLY BY ROTARY TYPE PICTURE MODEL SWITCH “SW02 ” MH026FNCA MH035FNCA MH052FNCA MH026FECA SLIM DUCT MH035FECA MH052FECA Samsung Electronics...
  • Page 77 Cooling mode (indoor unit check) Heating mode (indoor unit check) → Outlet air temp.-Inlet air temp : From 11°K to 14°K (indicative delta T) In heating mode,the indoor fan motor can remain off to avoid cold air blown into conditioned space. Samsung Electronics...

  • Page 78: Error Codes

    Indoor unit heat exchanger in temperature sensor error (open/short) E237 Condenser temperature sensor error (open/short) E251 Compressor Discharge temperature sensor error (open/short) E251 Compressor OLP sensor error (open/short) E230 Please, The System turn off and replace sensor which is related. Guidance Samsung Electronics...
  • Page 79 Indoor sensor proper location. During the pipe checking operation , system check temperature change of indoor Heat exchanger.In case, indoor Guidance sensor defect, EEV coil connector detach, malfunction of EEV, Leakage of Refrigerant, and etc can make this case. Samsung Electronics...

  • Page 80: Operation Case Troubleshooting

    This is caused by protection mode behavior. Analysis This is indoor Evaporator Freezing protection mode. Step 1 Please, check indoor unit, whether inlet or outlet grill is closed. Step 2 Please, check indoor unit, whether indoor fan is working. Samsung Electronics 9-10...
  • Page 81 Check point Remarks These Error codes only apply with Try-run mode, in case of system have some defect as result of try-run operation. Analysis ✳ Refer to self-detection algorithm (Check Error Code meaning and check it out) 9-11 Samsung Electronics...

  • Page 82: Fault Diagnosis By Symptom

    2 digit alternatively. Any Error code on LED display? Wait for 5 minutes to check error code Consult error code table because some error judgement needs long time Check Major parts(See 12-5) Consult error code(Next Page) Samsung Electronics 9-12...
  • Page 83 ? Error related to outdoor controller except Consult LED pattern on wiring diagram on temperature sensor and communication outdoor controller between indoor unit and outdoor unit ? See Error Code Table and Check “Main checking point” 9-13 Samsung Electronics...
  • Page 84 After power off this error will display until Blink DC LINK capacitor discharged.(Max 20sec.) Blink Option error (EEPROM error) Abnormal condition Blink Comp. peak current (Over Current) Blink Comp. starting error Comp. rotation error Blink DC-Link voltage error Blink Comp. V Limit Error Samsung Electronics 9-14...
  • Page 85 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 Estimated Primary current value from The unit is 0.1A Compressor current 9-15 Samsung Electronics...
  • Page 86 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 Discharge sensor temperature OLP sensor temperature The unit is degree C Condenser sensor temperature Outdoor sensor temperature Samsung Electronics 9-16...
  • Page 87 Troubleshooting  DA?GEJC""3 5GG(CWNV&KCIPQUKUQH/CLQT2CTVU %WTTGPV''8UVGRXCNWGECPOQPKVQTGFYKVJ8+'9/1&' 2TGUU-MG[QPVJGQWVFQQTFKURNC[2%$HQTUGXGTCNVKOGVQEJCPIGVJGFKURNC[VQEWTTGPV''8XCNWG .GHVFKIKVQHVJG.'&KUFCVCKPFGZCPF4KIJVFKIKVUKUVJGXCNWG Index Value Remark EEV-A step EEV-B step The step value range is between Zero and 480. EEV-C step EEV-D step -ELAI=P?DEJC 5GG %JGEMKPICPF6GUVKPIQRGTCVKQPU 9-17 Samsung Electronics...

  • Page 88: Pcb Inspection

    9-4-2 Procedure 12-4-2 The parts should be replaced in the following procedure. Check for any faulty part. Detach the faulty part. Replace it with a new part. Check the operation of the new part. The repair is completed. Samsung Electronics 9-18...

  • Page 89: Reference For Installation

    • It is harmful to the air conditioner if it is used in the following environments: greasy areas (including areas near machines), salty areas such as coast areas, areas where sulfuric gas is present such as hot spring areas. Contact your dealer for advice. 10-1 Samsung Electronics...
  • Page 90 2. Make sure that you put the remote control unit in an area not exposed to direct sunlight, and where there is no source of heat. 3. Make sure that you use the remote control unit in an area away from TVs, audio units, cordless phones, fluorescent lighting fixtures and other electrical appliances (at least 3.3ft). Samsung Electronics 10-2...

  • Page 91: Connecting Up And Purging The Circuit

    183kgf•cm with a torque wrench. Service port 7. Check for gas leakage. • At this time, especially check for gas leakage from the 3 way valve’s stem nuts, and from the service port cap. 10-3 Samsung Electronics...
  • Page 92 183kgf•cm with a torque wrench. 7 Check for gas leakage. - At this time,especially check for gas leakage from the 3-way valve ’s stem nuts,and from the service port cap. Samsung Electronics 10-4...

  • Page 93: Refrigerant Refill

    7) Stop operation of the air conditioner. 8) Close the 3 way valve, disconnect the pressure gauge, and open the 3 way valve again. 9) Close the cap of each valve. 10-5 Samsung Electronics...
  • Page 94 7) Stop operation of the air conditioner. 8) Close the 5/8" service valve, disconnect the pressure gauge, and open the 5/8" service valve again. 9) Close the cap of each valve. Samsung Electronics 10-6...
  • Page 95 2KRG.GPIVJ TGHGTVQ 5VCPFCTF 4GHGTVQVJG 7PPGEGUUCT[ 2WTIGCKTWUKPIC FGVCKNGF%QPPGEVKPIWR XCEWWORWOR URGEKHKECVKQPUJGGV 616#. b O /*(:%## CPFRWTIKPIVJGEKTEWKV QTCPCFFKVKQPCN RCIG TGHTKIGTCPVE[NKPFGT /CZ #FFQ\QHTGHTKIGTCPV #FFQ\QHTGHTKIGTCPV 616#. ŭ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amsung Electronics...

  • Page 96: Flare Nut Fixing Torque

    10-5 Flare Nut Fixing Torque T T orque (kg . cm) orque(kg . Outer diameter Fixing Torque Final Torque ø 1/4 inch (Liquid Side) ø 3/8 inch (Gas Side) ø 1/2 inch (Gas Side) Samsung Electronics 10-8...

  • Page 97: Pump Down" Procedure

    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. 10-9 Samsung Electronics...
  • Page 98 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. Samsung Electronics 10-10...

  • Page 99: Reference Information

    200~220V, 50Hz Free Inverter Version 220~240V, 50Hz Redd Digital Scroll _,12.. Indoor 127V, 50Hz _,A,B.. Outdoor Indoor/Outdoor Type Refrigerant 1 way Slim 1 way R407C Mini 4 way R410A Silhouette Duct Slim Vivave Moderato Console CONV Outdoor 11-1 Samsung Electronics...
  • Page 100 FREE JOINT MULTI FOR EUROPE Buyer code Product Type Capa Serial Version Indoor Capacity Multi *K BTU Basic - CAP Indoor(K BTU) MR(02R~) Outdoor Mode Refrigerant R410A Inverter Semi Product Indoor R407C Outdoor Indoor Type Vivave Moderato Samsung Electronics 11-2...

  • Page 101: Refrigerating Cycle Diagram

    11-2 Refrigerating Cycle Diagram ■ MH050FXCA2A 11-3 Samsung Electronics...
  • Page 102 Reference Information ■ MH080FXCA4A Samsung Electronics 11-4...

  • Page 103: Pressure & Capacity Mark

    Heat exchanger; A device, used to transfer heat from a fluid on one side of a barrier to a fluid ASS’Y EVAP/ASS’Y COND on the other side without bringing the fluids into direct contact. (Full name : assemble evaporator / assemble condenser) 11-5 Samsung Electronics...

  • Page 104: Q & A For Non-Trouble

    It occurs when the drain pump is plugged out or it is out of order. Check the power of the drain pump and the position of the drain hose, and when the pump is faulty, contact the drain pump manufacturer. Samsung Electronics do not manufacture drain pumps. So, we are not able to correct the drain pump problems.
  • Page 105 Set up a sun blind over the outdoor unit and clear the neighboring obstacles from the outdoor unit to provide good ventilation. When it goes off frequently during a heat wave, it would prevent the turn-off and increase the cooling capacity cleaning the outdoor unit or spraying some water to the heat exchanger. 11-7 Samsung Electronics...
  • Page 106 There is a cost table. But, our service engineer needs to visit to total up the cost correctly. When you move in, make sure to contact Samsung Electronics Service Center or Authorized Service Agent in advance to streamline the process.

  • Page 107: Common Sense Of Refrigeration

    But generally the value of fresh indoor temperature is that below 0.2(m/s) of indoor air circulation, the temperature is 21~28˚C when the wall temperature is the same as the indoor's and relative humidity is 30~31% in summer, the winter temperature is 20~24˚C and relative humidity is 30~60% in winter. 11-9 Samsung Electronics...
  • Page 108 Mideast & Africa http://mea.samsungportal.com © Samsung Electronics Co., Ltd. Jan. 2008. This Service Manual is a property of Samsung Electronics Co., Ltd. Any unauthorized use of Manual can be punished under applicable Printed in Korea. International and/or domestic law.

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