Page 1: Table Of Contents
ROOM AIR CONDITIONER INDOOR UNIT OUTDOOR UNIT MH18ZC1(C2)-09 MH18ZC1(C2)X MH19ZC1(C2)-07 MH19ZC1(C2)X MH19ZC1(C2)-12 MH24ZC1(C2)-12 MH24ZC1(C2)X MH26ZC1(C2)-07 MH26ZC1(C2)X MH26ZC1(C2)-12 Manual SERVICE AIR CONDITIONER CONTENTS 1. Precautions 2. Product Specifications 3. Operating Instructions and Installation 4. Disassembly and Reassembly 5. Troubleshooting 6. Exploded Views and Parts List 7.
Page 2: Precautions
Relocate the unit if necessary. 9. Keep children away from the unit while it is being repaired. 10. Be sure to clean the unit and its surrounding area. Fig. 1-3 No Kids Nearby! Fig. 1-4 Clean the Unit Samsung Electronics...
Page 3 MEMO Samsung Electronics...
Page 4 2. Product Specifications 2-1 Table MH18ZC1(C2) Model INDOOR UNIT OUTDOOR UNIT Item MH18ZC1(C2)-09 MH18ZC1(C2)X Wall-Mounting Multi Split Type 2.63/2.78 5.26/5.56 9000/9500 18000/19000 Cooling/Heating BTU/h Perfor- 2268/2394 4536/4788 Kcal/h mance Dehumiditying 7.0/7.5 Air volume(Cooling/Heating) /min Noise 1-220-240V~, 50Hz Power ø-V-Hz 890/890...
Page 5: Samsung Electronics
Heat exchange A/B-Unit:Capillary tube Refrigerant control unit A:410 Freezer oil capacity B:410 A-Unit:1000g, B-Unit:1000g Refrigerant to caarge(R22) A:MRA12030-12008 Protection device B:MRA12030-12008 Indoor unit:DB27˚C WB19˚C Outdoor unit:DB35˚C WB24˚C Cooling test condition Indoor unit:DB32˚C WB23˚C Outdoor unit:DB43˚C WB26˚C Maxium operation condition Samsung Electronics...
Page 6 2Row 24Step 2Row 12Step 2Row 12Step 2Row 30Step A/B-Unit:Capillary tube A-Unit:Capillary tube, B/C-Unit:Auto Expansion valve A:260 A:260 B:410 B:410 A-Unit:740g, B-Unit:950g A-Unit:860g, B/C-Unit:1250g A:MST24AMN-12008 A:MRA12030-12008 B:MRA12030-12008 B:MRA12030-12008 Indoor unit:DB27˚C WB19˚C Outdoor unit:DB35˚C WB24˚C Indoor unit:DB32˚C WB23˚C Outdoor unit:DB43˚C WB26˚C Samsung Electronics...
Page 7 2-2 Dimensions 2-2-1 Indoor Unit (Front view) Air out (Remote control) Installation plate Samsung Electronics...
Page 8: Product Specifications
Product Specifications 2-2-2 Outdoor Unit 2-2-2(a) MH24ZC1(C2)X (Front view) (Rear view) 1000 2-2-2(b) MH18ZC1(C2)X/MH19ZC1(C2)X (Rear view) (Front view) Samsung Electronics...
Page 9 Product Specifications 2-2-2 Outdoor Unit 2-2-2(c) MH26ZC1(C2)X (Front view) (Rear view) 1000 Samsung Electronics...
Page 10: Refrigerating Cycle Block Diagram
5.4~5.6 Low temp. 3.5~3.7 Cooling Standard 5.0~5.2 A + B Max over load 5.4~5.6 Low temp. 3.5~3.7 Standard 17~19 A or B Max over load 19~25 Deice Heating Standard 17~19 A + B Max over load 19~25 Deice Samsung Electronics...
Page 11 Product Specifications 2-3-2 MH26ZC1(C2)X Samsung Electronics...
Page 12: Operating Instructions And
To select the 5 way function with the remote control, press the 5 way button one or more times until the desired mode is selected.. Each time you press the 5 way button Each 5 way indicator on the indoor unit comes on in or der. Samsung Electronics...
Page 13 4. DRY MODE : Has 3 states, each deter- mined by room temperature. The unit operates in DRY mode. *Compressor ON/OFF Time is controlled compulsorily(can not set up the fan speed, always breeze). *Protective function : Low temperature release. (Prevention against freeze) Samsung Electronics...
Page 14 The air conditioner is turned ON at a spec- ified time using OFF TIMER : The air Conditioner is turned OFF at a specified time using *ON TIMER : Only timer LED lights on. *OFF TIMER : Both timer and operation LED lights on. Samsung Electronics...
Page 15 •In case of 2Unit, Capacity & Current multiplied by 2 Cooling Capacity & Air Outlet Temperature Cooling Capacity Air Outlet Temp 13000 12000 11000 21/15 21/19 35/24 43/26 Outdoor Temperature(DB/WB) Current & Low Pressure Current Low Pressure 21/15 21/19 35/24 43/26 Outdoor Temperature(DB/WB) Samsung Electronics...
Page 16 •In case of 2Unit, Capacity & Current multiplied by 2 Heating Capacity & Air Outlet Temperature Heating Capacity Air Outlet Temp 14000 13000 12000 11000 10000 9000 8000 7000 -5/-6 Outdoor Temperature(DB/WB) Current & Low Pressure Current Low Pressure -5/-6 Outdoor Temperature(DB/WB) Samsung Electronics...
Page 17 Operating Instructions and Installation 3-2-1(b) MH18ZC1(C2)-09 / MH19ZC1(C2)-07 / MH26ZC1(C2)-07 • Cooling Characteristics - Outdoor Temperature Test Condition Indoor Unit(DB/WB) : 27/19 Voltage/Frequency : 240V/50Hz Cooling Capacity & Air Outlet Temperature Cooling Capacity Air Outlet Temp. 10000 9000 8000 7000...
Page 18 Test Condition Indoor Unit(DB/WB) : 20/15 Voltage/Frequency : 240V/50Hz Heating Capacity & Air Outlet Temperature Heating Capacity Air Outlet Temp. 10500 9500 8500 7500 Outdoor Temperature(DB/WB) Heating Capacity & High Pressure Heating Capacity High Pressure 10500 9500 8500 7500 Outdoor Temperature(DB/WB) Samsung Electronics...
Page 19 MEMO Samsung Electronics...
Page 20: Disassembly And Reassembly
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 and push it up. Caution; Assemble the front panel and fix the hooks of left and right. Samsung Electronics...
Page 21 2) Loosen the fixing two screws and separate the motor holder. 3) Loosen the fixing screw of fan motor. (By use of M3 wrench) 4) Separate the fan motor from the fan. 5) Separate the fan from the left holder bearing. Samsung Electronics...
Page 22 <MH18ZC1(C2)X/MH19ZC1(C2)X> Fan Motor 1) Do Procedure 1 above. <MH24ZC1(C2)X/MH26ZC1(C2)X> & 2) Remove the nut flange. Propeller Fan (Turn to the right to remove as it is a left turned screw) 3) Disassemble the propeller fan. <MH18ZC1(C2)X/MH19ZC1(C2)X> Samsung Electronics...
Page 23 MEMO Samsung Electronics...
Page 24: Troubleshooting
In case that the communication between the indoor unit and outdoor unit is not made for 60 seconds Outdoor sensor Error (open or short) (GREEN) - Outdoor sensor - Pipe sensor A, B (GREEN) The malfunction ot 4way valve in heat mode operation. Samsung Electronics...
Page 25: Set Up The Model Option
$ When pressing the button appear on the display, select one of them. % When pressing the button appear on the display, select one of them. ^ When pressing the button appear on the display, select one of them. Samsung Electronics...
Page 26 If all lamps of indoor unit are flickering, Plug out and plug in again and pressing 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 it’s model. Samsung Electronics...
Page 27 Troubleshooting <Table of the option code> MODEL OPTION CODE MH18ZC1-09 016223-1000EA MH18ZC2-09 006223-1000EA MH19ZC1-07 015553-1000b7 MH19ZC2-07 005553-1000b7 MH19ZC1-12 015553-10023F MH19ZC2-12 005553-10023F MH24ZC1-12 017553-10021d MH24ZC2-12 007553-10021d MH26ZC1-07 011553-1000d9 MH26ZC2-07 001553-1000d9 MH26ZC1-12 015553-10023F MH26ZC2-12 005553-10023F Samsung Electronics...
Page 28 • Perform the test operation only for the unit selected last. • Check the pipe pressure and the other operation status during the test operation. • Check items when the error occurs during the test operation (each unit) - Check there is enough refrigerant. - Check pipe connections. Samsung Electronics...
Page 29 Communication unit number display : C unit •During the test operation the unit under test (In case of triple split multi air conditioner) is on and off every 0.25s. Refrigerant leaks High temperature of the A cond High temperature of the B cond Samsung Electronics...
Page 30: Fault Diagnosis By Symptom
Check PCB pattern. Replace ICO2 Replace main PCB. 10ms Is voltage output terminal of TLP180(PC02) normal? Are voltage at #48 and #49 of the micom normal? Replace resonator (X301) 250ns Replace TLP180(pc02) Is operation normal? Replace micom Samsung Electronics...
Page 31 IC (KA 7812) DC 10V and 12V? D105) and KA7812. Is the output voltage of electrostatic voltage KA7805 is out of order - replace regulator IC (KA 7805) DC 4.5 V - 5.5 V? Replace the main PCB of indoor unit Samsung Electronics...
Page 32 (D101 - D104) IC01 (KA 7812) is DC 12V. and KA 7812. Check whether the output voltage of Replace the IC 02 (KA7805) IC02 (KA 7805) is DC 5V. Replace the outdoor unit Ass'y main PCB. Samsung Electronics...
Page 33 Replace the IC 06 (KID 65003) and the old type? SS71(G3MB202pl). 120Hz Is the pin no 25 of MICOM Replace Q401 (Ksc 945Y). the old type? Replace the indoor unit PCB Ass'y due to the Micom defect. 5-10 Samsung Electronics...
Page 34 (3) Perform the comp ON/OFF control in the dry mode. (4) When it is under the operation of anti-freezing, overload protection, defrost operation, it may be Low, high or Off. (5) Hi = High speed, Low = Low speed Samsung Electronics 5-11...
Page 35 Normal trol unit pushed? Voltage at pin #33-#36 of micom (ICO4) Micom (IC04) is faulty. change?(Squarewave) Volatge at pin #13, #14, #15, #16 of IC05 (KID65003) Driver IC05 (KID65003) is faulty. change?(Squarewave) UP/DOWN louver motor is faulty. 5-12 Samsung Electronics...
Page 36: If Operation By Remote Control Unit Is Impossible. (Initial Diagnosis)
Voltage at PIN #30 of Remocon Micom change? Voltage at collecter of Q601 or Q602 change? Q601(C4375Y) or Q602(C1623Y) is faulty. IR LED(CL-1L5EU) is faulty. Voltage at pin #26 of micom (IC04) change (INDOOR UNIT)? Receiver module is faulty. Micom (IC04) is faulty. Samsung Electronics 5-13...
Page 37 (3) The changeover of heating to cooling : put the 4 way valve off immediately (in case of B and C room). (4) The changeover of cooling to heating : it is on after 170 seconds delay. 5-14 Samsung Electronics...
Page 38: Indoor Unit Operation
* Comp A( ) power measuring terminal (1) Comp A measuring ; RY 73 (4) ↔ RY 72 (4) RY71 (2) Comp B measuring ; RY 71 (4) ↔ RY 72 (4) (3) Power input ; RY 72 (3) ↔ RY 73(3) RY73 Samsung Electronics 5-15...
Page 39: Pcb Inspection
5-5-2 Procedure 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. 5-16 Samsung Electronics...
Page 40 1. Indoor unit fan motor is faulty. RMC switch pushed. above 180V~ 1. [FAN] mode 2. Fan speed [Hi] 2. Indoor unit fan motor does not operate. 2. Poor connection of indoor fan motor 3. Continuously operation and connector of RPM sensing (CN43) Samsung Electronics 5-17...
Page 41: Fault Diagnosis Of Major Parts
∞, O Ω … open or short Abnormal Measure resistance between red wire and each terminal. Stepping Motor Normal Approx. 380Ω at ambient temperature (20˚C ~30˚C) (UP/DOWN swing motor) ∞, O Ω … open or short Abnormal 5-18 Samsung Electronics...
Page 42 MEMO Samsung Electronics 5-19...
Page 43: Exploded Views And Parts List
6. Exploded Views and Parts List 6-1 Indoor Unit 20-6 20-6-1 20-1 20-4 20-5 20-3 20-2 13-2 13-3 13-4 17 18 13-1 You can search for the updated part code number through the ITSELF. URL : http://itself.sec.samsung.co.kr Samsung Electronics...
Page 44 Exploded Views and Parts List Parts List Q’TY CODE NO Description MH18ZC1(C2)-09 MH19ZC1(C2)-07 MH19ZC1(C2)-12 MH24ZC1(C2)-12 MH26ZC1(C2)-07 MH26ZC1(C2)-12 DB64-00354A GRILLE-AIR INLET DB63-00064A GUARD-AIR FILTER DB95-00287G ASSY-CLEANER FILTER DB63-00067A COVERTER-TERMINAL DB92-00248A ASSY PANEL-FRONT DB67-00051A SPACER-EVAP LOW DB67-00032A SPACER-EVAP UP DB63-00083A COVER U-BEND...
Page 45 6-2 Outdoor Unit 6-2-1 MH18ZC1(C2)X / MH19ZC1(C2)X 11-1~11-7 14-1~14-5 Samsung Electronics...
Page 46 14-1 DB73-00070A GROMMET-ISOLATOR NR 35˚ 14-2 DB60-30028A NUT-WASHER 14-3 DB60-30018A NUT-FLANGE 14-4 DB63-10165D COVER TERMINAL PBT,2.5 14-5 DB47-20002B MRA12037-12007 DB47-20001Y MST24AMN-12008 DB47-20001Z MRA12030-12008 DB96-01316B ASSY COND-UNIT ASS’Y DB96-01316D ASSY COND-UNIT ASS’Y DB63-10492A COVER-HANDLE ABS,T2.0 DB32-00025A THERMISTOR-OUT ASS’Y 103AT Samsung Electronics...
Page 47 Exploded Views and Parts List 6-2-2 HM24ZC1(C2)X 12-1~12-5 9-1~9-6 6(6-1~6-2) Samsung Electronics...
Page 48 ASSY PARTITION ASS’Y DB90-00742A ASSY-CABI-UP ASS’Y 48A124JV1EG ROTARY COMPRESSOR 12-1 DB73-00067A GROMMET ISOLATOR 12-2 DB60-30018A NUT-FLANGE 12-3 DB60-30028A NUT-WASHER 12-4 DB63-10165D COVER TERMINAL PBT,2.5 12-5 DB47-20001Z OLP-POLYESTER MRA12030-12008 DB96-01356G ASSY COND-UNIT ASS’Y DB63-10492A COVER-HANDLE ABS,T2.0 DB32-00025A THERMISTOR-OUT ASS’Y 103AT Samsung Electronics...
Page 49 Exploded Views and Parts List 6-2-3 MH26ZC1(C2)X Samsung Electronics...
Page 50 ASSY PARTITION ASS’Y DB90-00742A ASSY-CABI-UP ASS’Y 48A124JV1EG ROTARY COMPRESSOR 13-1 DB73-00067A GROMMET ISOLATOR 13-2 DB60-30018A NUT-FLANGE 13-3 DB60-30028A NUT-WASHER 13-4 DB63-10165D COVER TERMINAL PBT,2.5 13-5 DB47-20001Z OLP-POLYESTER MRA12030-12008 DB96-01356H ASSY COND-UNIT ASS’Y DB63-10492A COVER-HANDLE ABS,T2.0 DB32-00025A THERMISTOR-OUT ASS’Y 103AT Samsung Electronics...
Page 51 6-3 Remote Control & PCB Box 6-3-1 ASS’Y REMOCON : DB93-00251L Parts List Description Q’TY Remark INLAY LCD CASE TOP KEY RUBBER ASS’Y PCB REMOCON CASE LOW BATTERY COVER Samsung Electronics...
Page 52 TERMINAL BLOCK ASSY ASSY DISPLAY PCB CONNECTOR WIRE PCB U/D HOLDER CLAMP IN SGCC-M SEAL CONTROL SIDE SEAL H/CONTROL FRONT SCREW MACHINE PH, M3 x L20 CORE Ni-Zn, ø18, BNF-18 HOLDER WIRE CLAMP SCREW MACHINE TH, +, M4x16 Samsung Electronics 6-10...
Page 53: Pcb Diagrams
7. PCB Diagrams 7-1 Main PCB : (Indoor Unit) Samsung Electronics...
Page 54 R2012 1kΩ ± 5 R-CHIP R2012 0 ± 5 R2012 0 ± 5 R-CHIP R2012 560Ω ± 5 R2012 560Ω ± 5 DIODE DRIDGE DF06S DF06S PHOTO COUPLER TLP180(GB-TPL) TLP180(GB-TPL) ZENER DIODE BZX84-C11 BZX84-C11 ZENER DIODE BZX84-C3V6 BZX84-C3V6 EEPROM 93LC56B-I/SN 93LC56B-I/SN Samsung Electronics...
Page 55 7-2 OUTDOOR PCB 18K/19K/24K Samsung Electronics...
Page 56 7-3 OUTDOOR PCB Samsung Electronics...
Page 57 CONNECTOR WAFER YW396-03AV RED CN91,CN92 3711-003247 CONNECTOR WAFER YW250-14 WHT CN61 3711-000999 CONNECTOR WAFER YW250-05 WHT CN62 3711-000997 CONNECTOR WAFER YW250-05 BLU GT01 3712-001062 CONNECTOR-TERMINAL GP88191-2 IC01 DE60-10100A SCREW-PH M3*G FeFzY IC01 DE62-30032A HEATSI-PH AL H25 DE41-10446A PCB-OUT FR-1 Samsung Electronics...
Page 58: Wiring Diagrams
8. Wiring Diagrams 8-1 Indoor Unit Samsung Electronics...
Page 59 8-2 Outdoor Unit (MH18ZC1(C2)X, MH19ZC1(C2)X, MH24ZC1(C2)X) Samsung Electronics...
Page 60 Wiring Diagrams 8-2-1 MH26ZC1(C2)X Samsung Electronics...
Page 61 64.5x53 MODULE REMOCON RM01 KSM-713TH5 TACT SWITCH SW01 KPT-1105A C-CERAMIC 102K C-CERAMIC 104Z DIODE SWITCHING IN4148 R-CARBON R01, R02, R03 470 1/2W 5% JUMP 10mm CONNECTOR WAFER CN02 SMAW200-05 CONNECTOR WIRE CN01 UL1007, AWG#26 8-4 ASS’Y CENTER DISPLAY;DB93-00859A Samsung Electronics...
Page 62: Schematic Diagrams
9. Schematic Diagrams 9-1 Indoor Unit (H/P AII MODEL) Samsung Electronics...
Page 63 9-2 Outdoor Unit (MH18/19/24ZC1(C2)X) Samsung Electronics...
Page 64 9-3 Outdoor Unit(MH26ZC1(C2)X) Samsung Electronics...
Page 65 MEMO Samsung Electronics...
Page 66 Itself Solution Integrated technology supporting electronic library http://itself.sec.samsung.co.kr Copyright © 2002 By Samsung Electronics Co., Ltd. All rights reserved. This manual may not, in whole or in part, be copied, photocopied, reproduced, translated, or converted to any electronic or machine readable from without prior written permission of Samsung Electronics Co., Ltd.

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