Page 2 - TABLE OF CONTENTS
2 Multi type Air Conditioner Multi type Air Conditioner Service Manual TABLE OF CONTENTS Combination table .......................................................................................................................................3Safety Precautions .........................................
Page 3 - Service Manual 3; This symbol alerts you to the risk of electric shock.; Symbols Used in this Manual; Combination table
Service Manual 3 Operation 1 Unit 2 Unit Combination of Indoor Unit(kBtu/h) Cooling Each Capacity Unit-A Unit-B UNIT-A(Btu/h) UNIT-B(Btu/h) Total Btu/h kW UNIT-A(Btu/h) UNIT-B(Btu/h) Btu/h kW Total Capacity Each Capacity Total Capacity Heating 12 12 12 12 24 12000 12000 - 12000 12000 24000 12000 240...
Page 4 - Safety Precautions; This symbol indicates the possibility of death or serious injury.; WARNING; Installation; Be sure to follow the instruction.
4 Multi type Air Conditioner Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage, the following instructions mustbe followed. ■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness isclassified by the following...
Page 5 - Gasolin
Service Manual 5 Safety Precautions Do not install, remove, or re-install the unit by yourself(customer). • There is risk of fire, electric shock, explosion, or injury. Be cautious when unpackingand installing the product. • Sharp edges could cause injury. Be especially careful of the caseedges and ...
Page 7 - CAUTION
Service Manual 7 Safety Precautions When the product is not to be used for a long time,disconnect the power by turning off the breaker. • There is risk of product damage or failure, or unintend- ed operation. Take care to ensure that nobody could step onor fall onto the outdoor unit. • This could re...
Page 8 - Operational; Wa
8 Multi type Air Conditioner Safety Precautions Do not expose the skin direct-ly to cool air for long periodsof time. (Don't sit in the draft.) • This could harm to your health. Do not use the product forspecial purposes, such aspreserving foods, works ofart, etc. It is a consumer airconditioner, no...
Page 10 - Dimensions; Indoor Unit; Split Type Indoor; Model
10 Multi type Air Conditioner Dimensions Dimensions Indoor Unit Split Type Indoor Installation plate D H W W mm(in) 895(35.2) H mm(in) 282(11.1) D mm(in) 165(6.5) Model Dimension Split Type(SE) 12 kBtu/h
Page 11 - Service Manual 11; Outdoor Unit
Service Manual 11 Outdoor Unit W D L1 L2 L4 L3 H L7 L5 L6 W mm(in) 870(34.3) H mm(in) 800(31.5) D mm(in) 320(12.6) L1 mm(in) 370(14.6) L2 mm(in) 25(1.0) L3 mm(in) 775(30.5) L4 mm(in) 25(1.0) L5 mm(in) 546(21.5) L6 mm(in) 160(6.3) L7 mm(in) 160(6.3) UE1 24kBtu/h MODEL DIM Dimensions
Page 12 - Product Specifications; Operation
12 Multi type Air Conditioner Product Specifications Product Specifications DMC24DB-1 23,600/24,000 11,800/12,000 208/230V - - 2.4(0.085) 1.2(0.042) at 230V 1Ø, 208/230V, 60Hz Indoor – 9.4(331.9) Outdoor 53(1871.8) Indoor – 36/32/29 at 230V Outdoor 54 2,390/2,390 1,420/1,420 - - 10.1/10.1 6.3/6.3 20...
Page 14 - Installation Parts; Read carefully, and then follow step by step.
14 Multi type Air Conditioner Installation Installation Type "A" screw and plastic anchor Type "B" screw Remote Control Holder Installation plate Figure Figure Name Screw driver Electric Drill Measuring Tape, Knife Hole Core Drill Spanner Torque wrench Ohmmeter Hexagonal wrench Ammet...
Page 15 - Indoor unit; Select the best location
Service Manual 15 Installation Indoor unit 1. Do not have any heat or steam near the unit. 2. Select a place where there are no obstacles in front of the unit. 3. Make sure that condensation drainage can be conve- niently routed away. 4. Do not install near a doorway. 5. Ensure the spaces indicated ...
Page 16 - Multi Piping Type; Piping length and elevation
16 Multi type Air Conditioner Installation Multi Piping Type Piping length and elevation 24k 30m(100ft) 15m(50ft) 3m(10ft) 7.5m(25ft) 7.5m(25ft) Capacity(Btu/h) Max total length of all pipes (A+B) Max length of each pipe (A/B) Min length of each pipe (A/B) Max Elevationbetween each indoor unit and o...
Page 18 - Flaring work; Cut the pipes and the cable.; Flaring Work and Connection of Piping
18 Multi type Air Conditioner Flaring Work and Connection of Piping Flaring work Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the following procedure. Cut the pipes and the cable. 1. Use the piping kit accessory or the pipes purchased locally. 2. Mea...
Page 19 - Check; Connecting the Piping; For right rear piping
Service Manual 19 Flaring Work and Connection of Piping Check 1. Compare the flared work with the figure by. 2. If a flared section is defective, cut it off and do flaring work again. Indoor 1. Prepare the indoor unit's piping and drain hose for installation through the wall. 2. Remove the plastic t...
Page 23 - HOW TO MOUNT ONTO A WALL; HOW TO INSERT BATTERIES
Service Manual 23 Flaring Work and Connection of Piping Remove the battery cover from the remote con-troller.• Slide the cover according to the arrow direction. Insert the two batteries.• Be sure that the (+) and (-) directions are correct.• Be sure that both batteries are new. Re-attach the cover.•...
Page 24 - 4 Multi type Air Conditioner; Outdoor; Outside diameter
24 Multi type Air Conditioner Outdoor Align the center of the pipings and sufficiently tighten the flarenut by hand. Finally, tighten the flare nut with torque wrench until thewrench clicks. • When tightening the flare nut with torque wrench, ensure the direction for tightening follows the arrow on ...
Page 25 - Connect the cable to the Indoor unit.; trol box panel by using tie wrap as the fixture.; Connecting the Cable between Indoor Unit and Outdoor Unit
Service Manual 25 Flaring Work and Connection of Piping Connect the cable to the indoor unit by connecting the wires to the terminals on the control board individuallyaccording to the outdoor unit connection. (Ensure that the color of the wires of the outdoor unit and the terminal No. arethe same as...
Page 26 - 6 Multi type Air Conditioner; Connect the cable to the Outdoor unit.
26 Multi type Air Conditioner Connect the cable to the Outdoor unit. 1. Remove the cover control from the unit by loosening the screw.Connect the wires to the terminals on the control boardindividually as the following. 2. Secure the cable onto the control board with the holder (clamper). 3. Refix t...
Page 27 - WARNING: Loose wiring may cause the termi-; How to connect wiring to the terminals; Connection method of the connecting cable(Example); High voltage; Strand wire
Service Manual 27 Connecting the Cable between Indoor Unit and Outdoor Unit (1) Remove two-caps on the conduit panel.(2) Make a hole appropriate for the passage of connection cable through on cap by tool.(for low voltage line) (3) Pass the connecting cable through the hole.(4) Properly connect the c...
Page 28 - 8 Multi type Air Conditioner; Connect the cable to the indoor unit
28 Multi type Air Conditioner Connect the cable to the indoor unit CAUTION: Provide a circuit breaker between power source and the unit as shownbelow. Air Conditioner Circuit BreakerUse a circuitbreaker or timedelay fuse. Main power source Model 24k 1Ø, 230/208V Per max. fuse size on unit name plate...
Page 29 - Checking the drainage; To check the drainage.; Drain piping; Checking the Drainage, Forming the Pipings and Long Pipe Setting
Service Manual 29 Checking the Drainage, Forming the Pipings and Long Pipe Setting Checking the drainage To check the drainage. 1. Pour a glass of water on the evaporator. 2. Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the drain exit. Drain pipin...
Page 30 - Forming the piping
30 Multi type Air Conditioner Checking the Drainage, Forming the Pipings and Long Pipe Setting Forming the piping Form the piping by wrapping the con-necting portion of the indoor unit withinsulation material and secure it withtwo kinds of vinyl tape. • If you want to connect an additional drain hos...
Page 31 - : Leakage test shoud be done for each indoor; Checking method; Air Purging and Evacuation
Service Manual 31 Air Purging and Evacuation Air and moisture remaining in the refrigerant system have undesirable effects as indicated below.1. Pressure in the system rises.2. Operating current rises.3. Cooling(or heating) efficiency drops.4. Moisture in the refrigerant circuit may freeze and block...
Page 32 - Finishing the job; Evacuation
32 Multi type Air Conditioner Checking the Drainage, Forming the Pipings and Long Pipe Setting 1. Connect the charge hose end described in the preceding steps to the vacuum pump to evacuate the tubing andindoor unit.Confirm the "Lo" knob of the manifold valve is open. Then,run the vacuum pum...
Page 33 - Charging
Service Manual 33 Charging ■ Each outdoor unit is factory charged (nameplate charge) for the evaporator as well as a 7.5m(25ft) line set for each indoorline. Any time total line set is used either shorter or longer then the nominal 22.5m(75ft: for tri-zone) line set length the refrigerantcharge has ...
Page 34 - 4 Multi type Air Conditioner; ) Prepare remote controller; Split Type; Test Running
34 Multi type Air Conditioner 1. Check that all tubing and wiring have been properly con- nected. 2. Check that the gas and liquid side service valves are fully open. 1) Prepare remote controller Remove the battery cover by pulling it according tothe arrow direction.Insert new batteries making sure ...
Page 35 - MAIN UNIT FUNCTION; • DISPLAY; Operation Indicator; Cooling Mode Operation; Function of control
Service Manual 35 Operation 1. MAIN UNIT FUNCTION • DISPLAY Operation Indicator • On while in appliance operation, off while in appliance pause• Flashing while in disconnection or short in Thermistor (3 sec off / 0.5 sec on) Sleep Timer Indicator • On while in sleep timer mode, off when sleep timer ...
Page 36 - Fuzzy Operation; ) Fuzzy Operation for Cooling
36 Multi type Air Conditioner Operation 27°C(80.6°F), it operates with Super-Low(while in sleep mode, with the medium airflow speed).• While compressor off, the indoor fan is off when the indoor pipe temp is below 33°C(91.4°F), when above 35°C(95°F) , it operates with the low airflow speed. • While ...
Page 37 - ) Fuzzy Operation for Dehumidification; Airflow Speed Selection
Service Manual 37 Operation 2) Fuzzy Operation for Dehumidification • According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C(0.9°F) or more below the setting temp, the compressor is turned off. When 0.5°C(0.9°F) or more above the setting temp, thecompressor is...
Page 38 - Sleep Timer Operation; Chaos Swing Mode; Chaos Natural Wind Mode; Jet Cool Mode Operation; Auto Restarting Operation
38 Multi type Air Conditioner Operation • If the appliance is on pause at the time set by the timer, the pause continues. ■ Off-Timer <=> On-Timer Operation • When the set time is reached after the on/off time is input by the remote control, the on/off-timer operation is carried out according ...
Page 39 - Forced Operation; Buzzer Sounding Operation
Service Manual 39 Operation ■ Forced Operation • To operate the appliance by force in case that the remote control is lost, the forced operation selection switch is on the main unit of the appliance to operate the appliance in the standard conditions. • When the power is supplied while the slide swi...
Page 40 - Function of Indoor Unit; Split Type Indoor Unit
40 Multi type Air Conditioner "Wall Mounted Type is standard"* Functions is dependent on model type. Operation Function of Indoor Unit On/Off : Lights up during the system operation. Sleep Mode : Lights up during Sleep Mode Auto operation. Timer : Lights up during Timer operation. Defrost Mo...
Page 41 - Function of Outdoor Unit
Service Manual 41 Operation Function of Outdoor Unit Outdoor Unit Operating Step LEV Control Out door Fan Control • Compressor step varies considering condition such as room temp,outdoor temp, operating room number,Temp gap between room temp and set temp and so on. • LEV pulse is modulated to keep c...
Page 42 - Remote Control Operation; Operation Mode
42 Multi type Air Conditioner Operation Remote Control Operation ON OFF CANCEL AUTO CLEAN ° C/ ° F SET Cooling Operation Auto Operation Healthy Dehumidification Operation Flip-up door(opened) Heating Operation Signal transmitter • Cooling Model( ), Heat Pump Model( ) 5 1 3 10 9 16 17 12 1815 6 4 27 ...
Page 43 - Disassembly; Before removing the control box, be sure to
Service Manual 43 Disassembly Disassembly Indoor Unit Split Type Indoor Unit Disconnect the unit from power supply before mak-ing any checks.Be sure the power switch is set to “OFF”. To remove the Grille from the Chassis. • Set the up-and-down air discharge louver to open position (horizontally) by ...
Page 44 - • When repair, do not damage the Caution label.
44 Multi type Air Conditioner Disassembly 2. To remove the Control Box. • Remove securing screws. • Pull the control box out from the chassis carefully. 3. To remove the Discharge Grille. • Unhook the discharge grille and pull the discharge grille out from the chassis carefully. 4. To remove the Eva...
Page 45 - To remove the Motor Cover
Service Manual 45 Disassembly • Unhook the tab on the right inside of the chassis at the same time, slightly pull the evaporatortoward you until the tab is clear of the slot. 5. To remove the Motor Cover • Remove 2 securing screw.• Pull the motor cover out from the chassis carefully. 6. To remove th...
Page 46 - Schematic Diagram; Electronic Control Device
46 Multi type Air Conditioner Schematic Diagram Schematic Diagram Electronic Control Device 1. Indoor Unit 1) Split Type
Page 49 - Service Manual 49; Room Type Indoor Unit; Wiring Diagram
Service Manual 49 1. Room Type Indoor Unit Wiring Diagram Schematic Diagram 2. Outdoor Unit1) DMH24DB-1 2) DMC24DB-1
Page 50 - Components Locations; • TOP VIEW
50 Multi type Air Conditioner Schematic Diagram 1. Indoor Unit MAIN P.C.B ASM 1) Split Type Components Locations • TOP VIEW • BOTTOM VIEW PCB :6870A90409BASSY :6871A20771 6871A20782
Page 54 - 4 Multi type Air Conditioner; Troubleshooting Guide; Refrigeration Cycle Diagram
54 Multi type Air Conditioner High Pres. S witch Cons. Comp (GK094K) C/V1 C/V2 Th1 Th2 Acc. A-Room B-Room LEV-A LEV-B AirSensor Eva.Sensor Eva.Sensor 9.52 6.35 LEV 15RC R/Valve5220AR3228E AirSensor strainer strainer Sensor Cons. Comp (GK141K) Ø Ø 1. DMH24DB-1 2. DMC24DB-1 Troubleshooting Guide Troub...
Page 55 - Error Indicator; Self-diagnosis Function; Indoor Error
Service Manual 55 Troubleshooting Guide ■ Error Indicator • The function is to self-diagnoisis airconditioner and express the troubles identifically if there is any trouble.• Error mark is ON/OFF for the operation LED of evaporator body in the same manner as the following table.• If more than two tr...
Page 56 - Trouble analysis; Cycle Troubleshooting Guide
56 Multi type Air Conditioner Troubleshooting Guide Trouble analysis 1. Check temperature difference between intake and discharge air, and operating current. All amount of refrigerant leaked out. Check refrigeration cycle. Refrigerant leakageClog of refrigeration cycleDefective compressor Excessive ...
Page 57 - Electronic Parts Troubleshooting Guide; The Product doesn’t operate at all.; Procedure
Service Manual 57 Troubleshooting Guide Electronic Parts Troubleshooting Guide ❇ Refer to electronic contorol device drawing & schematic diagram. The Product doesn’t operate at all. Turn off the main power and wait until LED on outdoor PCB is off. Turn on the main power again. Does "Beeping&...
Page 58 - Product doesn't operate with the remote controller.
58 Multi type Air Conditioner Troubleshooting Guide Turn on main power. While the compressor has been stopped, the compressor does not operate owing to the delaying function for 3 minutes after stopped. When the compressor stopped Indoor Fan is driven by a low speed. At this point the wind speed is ...
Page 59 - The Compressor/Outdoor Fan are don't operate; Check Point
Service Manual 59 Troubleshooting Guide Turn on the main power. When in air circulation mode, compressor/outdoor fan is stopped. Turn off main power. Check the electrical wiring diagram of Outdoor side.Check the open or short of connecting wires between Indoor and Outdoor. Check the sensor for Indoo...
Page 60 - When indoor Fan does not operate.
60 Multi type Air Conditioner Troubleshooting Guide When indoor Fan does not operate. Check connecting condition of the CN-MOTOR CON-NECTOR Does the voltage of terminal of CN-DC/DC CONNECTOR inIndoor unit corresponds to the values in the table of page 56 Do the voltage of terminal ofCN-DC/DC CONNECT...
Page 61 - When the louver does not operate.
Service Manual 61 Troubleshooting Guide When the louver does not operate. Trouble 5 When Vertical Louver does not operate. • Confirm that the Vertical Louver is normally geared with the shaft of Stepping Motor. • If the regular torque is detected when rotating the Vertical Louver with hands Normal •...
Page 62 - Error Code; Check the resistance / voltage
62 Multi type Air Conditioner Troubleshooting Guide Error Code ■ Trouble Shooting Error Title Cause of error Check point & Normal condition code 01 Indoor air sensor 02 Indoor inlet pipe sensor 06 Indoor outlet pipe sensor • Open / Short• Soldered poorly• Internal circuit error • Open / Short• S...
Page 63 - Error
Service Manual 63 Troubleshooting Guide Error Title Cause of error Check point & Normal condition code 05 / 53 Communication (Indoor ➔ Outdoor) • Communication poorly • Power input AC 230V.(Outdoor, Indoor)• The connector for transmission is disconnected.• The connecting wires are misconnected.•...
Page 65 - Check the resistance
Service Manual 65 Troubleshooting Guide Error Title Cause of error Check point & Normal condition code 44 Outdoor air sensor 45 Condensor pipe sensor 47 D-Pipe sensor • Open / Short• Soldered poorly• Internal circuit error • Open / Short• Soldered poorly• Internal circuit error • Open / Short• S...
Page 66 - 6 Multi type Air Conditioner
66 Multi type Air Conditioner 2-way, 3-way Valve 2-way, 3-way Valve 2-way Valve (Liguid Side) 3-way Valve (Gas Side) Works Shaft position Shaft position Service port Shipping Closed Closed Closed (with valve cap) (with valve cap) (with cap) Air purging Open Closed Open (Installation) (counter-clockw...
Page 67 - Service Manual 67
Service Manual 67 2-way, 3-way Valve • Be sure to short pressure S/W. otherwise Low pressure S/W detect low pressure skete and stops the compressor. (1) Pumping down • Procedure 1. Confirm that both the gas side and liquid side valves are set to the open position. - Remove the valve stem caps and co...
Page 68 - 8 Multi type Air Conditioner; • Procedure
68 Multi type Air Conditioner 2-way, 3-way Valve (2) Evacuation (All amount of refrigerant leaked) • Procedure 1. Confirm that both the liguid side valve and gas side valve are set to the opened position. 2. Connect the vaccum pump to the center hose of the manifold gauge. 3. Connect the service por...
Page 69 - Service Manual 69; Connect the gauge to the charging cylinder.
Service Manual 69 2-way, 3-way Valve (3) Gas Charging (After Evacuation) • Procedure 1. Connect the gauge to the charging cylinder. - Connect the charge hose which you disconnect- ed from the vacuum pump to the valve at thebottom of the cylinder. - If you are using a gas cylinder, also use a scale a...
