Heat Controller DMC24DB-1 Service Manual
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Heat Controller DMC24DB-1 Service Manual

Heat Controller DMC24DB-1 Service Manual

Wall mounted multi-split system air conditioning/heat pump
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See also: Owner's Manual , Instruction and Installation Manual
HEAT CONTROLLER, INC.

Wall Mounted

Multi-Split System
Air Conditioning/Heat Pump
DMC24DB-1
DMH24DB-1
Before servicing the unit, read the
"safety precautions" in this manual.
Only for authorized service personnel.

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Summary of Contents for Heat Controller DMC24DB-1

  • Page 1: Wall Mounted

    HEAT CONTROLLER, INC. Wall Mounted Multi-Split System Air Conditioning/Heat Pump DMC24DB-1 DMH24DB-1 Before servicing the unit, read the “safety precautions” in this manual. Only for authorized service personnel.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Combination table............................3 Safety Precautions............................4 Dimensions..............................10 Indoor Unit.............................10 Outdoor Unit ............................11 Product Specifications ..........................12 DMC24DB-1 ............................12 DMH24DB-1 ............................13 Installation ..............................14 Installation Parts.............................14 Installation Tools.............................14 Select the best location .........................15 Piping length and elevation ........................16 Fixing Installation Plate(Standard Type)....................17 Flaring Work and Connection of Piping....................18...

  • Page 3: Combination Table

    Combination table Combination table Cooling Heating Combination of Indoor Unit(kBtu/h) Operation Each Capacity Total Capacity Each Capacity Total Capacity Unit-A Unit-B Total UNIT-A(Btu/h) UNIT-B(Btu/h) Btu/h UNIT-A(Btu/h) UNIT-B(Btu/h) Btu/h 12000 12000 3516 12000 12000 3516 1 Unit 12000 12000 24000 7033 12000 12000 24000...

  • Page 4: Safety Precautions

    Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications. WARNING This symbol indicates the possibility of death or serious injury.
  • Page 5 Safety Precautions Do not install, remove, or re- Be cautious when unpacking For installation, always con- install the unit by yourself and installing the product. tact the dealer or an (customer). Authorized Service Center. • There is risk of fire, electric shock, •...
  • Page 6 Safety Precautions When flammable gas leaks, If strange sounds, or smoke Stop operation and close the turn off the gas and open a comes from product. Turn the window in storm or hurricane. window for ventilation before breaker off. If possible, remove the prod- turn the product on.
  • Page 7 Safety Precautions When the product is not to be used for a long time, Take care to ensure that nobody could step on disconnect the power by turning off the breaker. or fall onto the outdoor unit. • There is risk of product damage or failure, or unintend- •...
  • Page 8 Safety Precautions Operational Do not expose the skin direct- Do not use the product for Do not block the inlet or outlet ly to cool air for long periods special purposes, such as of air flow. of time. preserving foods, works of (Don't sit in the draft.) art, etc.
  • Page 9 Safety Precautions Use a firm stool or ladder when cleaning or Replace the all batteries in the remote control maintaining the product. with new ones of the same type. Do not mix old and new batteries or different types of bat- teries.

  • Page 10: Dimensions

    Dimensions Dimensions Indoor Unit Split Type Indoor Installation plate Model Split Type(SE) 12 kBtu/h Dimension mm(in) 895(35.2) mm(in) 282(11.1) mm(in) 165(6.5) 10 Multi type Air Conditioner...

  • Page 11: Outdoor Unit

    Dimensions Outdoor Unit MODEL 24kBtu/h mm(in) 870(34.3) mm(in) 800(31.5) mm(in) 320(12.6) mm(in) 370(14.6) mm(in) 25(1.0) mm(in) 775(30.5) mm(in) 25(1.0) mm(in) 546(21.5) mm(in) 160(6.3) mm(in) 160(6.3) Service Manual 11...

  • Page 12: Product Specifications

    Product Specifications Product Specifications DMC24DB-1 Operation Remarks 1-Unit On 2-Unit On Unit Item 23,600/24,000 11,800/12,000 208/230V Cooling Capacity Btu/h Heating Capacity Moisture Removal /h(ft 2.4(0.085) 1.2(0.042) at 230V Power Source ø, V, Hz 1Ø, 208/230V, 60Hz Indoor – 9.4(331.9) Air Circulation...

  • Page 13: Dmh24Db-1

    Product Specifications DMH24DB-1 Operation Remarks 1-Unit On 2-Unit On Unit Item 23,600/24,000 11,800/12,000 208/230V Cooling Capacity Btu/h Heating Capacity 23,600/24,000 11,800/12,000 Moisture Removal /h(ft 2.4(0.085) 1.2(0.042) at 230V Power Source ø, V, Hz 1Ø, 208/230V, 60Hz Indoor – 9.4(331.9) Air Circulation /min(ft /min) Outdoor...

  • Page 14: Installation

    Installation Installation Read carefully, and then follow step by step. Installation Parts Installation plate Type "A" screw and plastic anchor Type "B" screw Remote Control Holder Installation Tools Figure Name Figure Name Screw driver Ohmmeter Electric Drill Hexagonal wrench Measuring Tape, Knife Ammeter Hole Core Drill Gas Leak Detector...

  • Page 15: Select The Best Location

    Installation Select the best location Indoor unit 1. Do not have any heat or steam near the unit. More than 5cm 2. Select a place where there are no obstacles in front (2.0 inch) More than 5cm of the unit. (2.0 inch) 3.

  • Page 16: Piping Length And Elevation

    Installation Piping length and elevation Multi Piping Type Max Elevation Max elevation Max total length of Max length of each Min length of each between each Capacity(Btu/h) between indoor all pipes (A+B) pipe (A/B) pipe (A/B) indoor unit and out- units (h2) door unit (h1) 30m(100ft)

  • Page 17: Fixing Installation Plate(Standard Type)

    Installation Fixing Installation Plate(Standard Type) The wall you select should be strong and solid enough to prevent vibration Installation Plate 1. Mount the installation plate on the wall with type "A" screws. If mounting the unit on a concrete wall, use anchor bolts.

  • Page 18: Flaring Work And Connection Of Piping

    Flaring Work and Connection of Piping 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.

  • Page 19: Connecting The Piping

    Flaring Work and Connection of Piping Check 1. Compare the flared work with the figure by. Smooth all round 2. If a flared section is defective, cut it off and do flaring work Inside is shiny without scratches again. = Improper flaring = Inclined Surface Cracked Uneven...
  • Page 20 Flaring Work and Connection of Piping 4. Indoor unit installation Hook the indoor unit onto the upper portion of the installa- tion plate.(Engage the two hooks of the rear top of the Connecting cable indoor unit with the upper edge of the installation plate.) Ensure that the hooks are properly seated on the installa- tion plate by moving it left and right.

  • Page 21: Service Manual

    Flaring Work and Connection of Piping For left rear piping 1. Route the indoor tubing and the drain hose to the required piping hole position. 2. Insert the piping, drain hose, and the connecting cable into Connecting the piping hole. cable 3.
  • Page 22 Flaring Work and Connection of Piping Wrap the insulation material around the connecting por- Plastic bands Insulation material tion. 1. Overlap the connection pipe heat insulation and the indoor unit pipe heat insulation material. Bind them together with vinyl tape so that there may be no gap. 2.
  • Page 23 Flaring Work and Connection of Piping REMOTE CONTROL PREPARATION(OPTIONAL) HOW TO MOUNT ONTO A WALL HOW TO INSERT BATTERIES HOW TO INSERT BATTERIES Remove the battery cover from the remote con- troller. • Slide the cover according to the arrow direction. •...
  • Page 24 Flaring Work and Connection of Piping Outdoor Align the center of the pipings and sufficiently tighten the flare nut by hand. Finally, tighten the flare nut with torque wrench until the wrench clicks. Outdoor unit • When tightening the flare nut with torque wrench, ensure the direction for tightening follows the arrow on the wrench.

  • Page 25: Connecting The Cable Between Indoor Unit And Outdoor Unit

    Flaring Work and Connection of Piping Connecting the Cable between Indoor Unit and Outdoor Unit Connect the cable to the Indoor unit. Connect the cable to the indoor unit by connecting the wires to the terminals on the control board individually according to the outdoor unit connection.

  • Page 26: Connect The Cable To The Outdoor Unit

    Connecting the Cable between Indoor Unit and Outdoor Unit Connect the cable to the Outdoor unit. 1. Remove the cover control from the unit by loosening the Outdoor unit screw. Connect the wires to the terminals on the control board Terminal block individually as the following.

  • Page 27: Connection Method Of The Connecting Cable(Example)

    Connecting the Cable between Indoor Unit and Outdoor Unit Connection method of the connecting cable(Example) (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) Terminal (3) Pass the connecting cable through the hole.

  • Page 28: Connect The Cable To The Indoor Unit

    Connecting the Cable between Indoor Unit and Outdoor Unit CAUTION: Provide a circuit breaker between power source and the unit as shown below. Main power source Power source Fuse or breaker Circuit Breaker Model Conditioner Capacity Use a circuit 1Ø, 230/208V Per max. fuse size breaker or time on unit name plate delay fuse.

  • Page 29: Checking The Drainage, Forming The Pipings And Long Pipe Setting

    Checking the Drainage, Forming the Pipings and Long Pipe Setting 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.

  • Page 30: Forming The Piping

    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 with Seal a small insulation material and secure it with opening around the pipings with two kinds of vinyl tape.

  • Page 31: Air Purging And Evacuation

    Air Purging and Evacuation 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 capillary tubing. 5.

  • Page 32: Evacuation

    Checking the Drainage, Forming the Pipings and Long Pipe Setting Evacuation 1. Connect the charge hose end described in the preceding steps to the vacuum pump to evacuate the tubing and indoor unit. Confirm the "Lo" knob of the manifold valve is open. Then, Indoor unit run the vacuum pump.

  • Page 33: Charging

    Charging Charging Each outdoor unit is factory charged (nameplate charge) for the evaporator as well as a 7.5m(25ft) line set for each indoor line. Any time total line set is used either shorter or longer then the nominal 22.5m(75ft: for tri-zone) line set length the refrigerant charge has to be adjusted.

  • Page 34: Test Running

    Test Running Test Running Split Type 1. Check that all tubing and wiring have been properly con- Bolt 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 to the arrow direction.

  • Page 35: Operation

    Operation Operation Function of control 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 •...
  • Page 36 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. •...
  • Page 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, the compressor is turned on.

  • Page 38: Sleep Timer Operation

    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 to the set time.

  • Page 39: Forced Operation

    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 switch is on the forced operation position, or when the slide switch position is switched to the Auto Restarting (or test operation) position or switched from the remote control position to the forced operation position while the power is on, the forced operation is carried out.

  • Page 40: Function Of Indoor Unit

    Operation Function of Indoor Unit Split Type Indoor Unit Operation ON/OFF by Remote controller Sensing the Room Temperature • Room temperature sensor. (THERMISTOR) Room temperature control • Maintains the room temperature in accordance with the Setting Temp. Starting Current Control •...

  • Page 41: Function Of Outdoor Unit

    Operation Function of Outdoor Unit Outdoor Unit Operating Step • 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 Control • LEV pulse is modulated to keep constant superheat or subcooling. Out door Fan Control •...

  • Page 42: Remote Control Operation

    Operation Remote Control Operation The Remote Controller transmits the signals to the system. START/STOP BUTTON Signal transmitter Operation starts when this button is pressed and stops when the button is pressed again. OPERATION MODE SELECTION BUTTON Used to select the operation mode. (Cooling Only) (Heat Pump) ROOM TEMPERATURE...

  • Page 43: Disassembly

    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 finger pressure.
  • Page 44 Disassembly 2. To remove the Control Box. • Remove securing screws. • Pull the control box out from the chassis carefully. Screw 3. To remove the Discharge Grille. • Unhook the discharge grille and pull the discharge grille out from the chassis carefully. 4.
  • Page 45 Disassembly • Unhook the tab on the right inside of the chassis at the same time, slightly pull the evaporator toward you until the tab is clear of the slot. 5. To remove the Motor Cover • Remove 2 securing screw. •...

  • Page 46: Schematic Diagram

    Schematic Diagram Schematic Diagram Electronic Control Device 1. Indoor Unit 1) Split Type 46 Multi type Air Conditioner...
  • Page 47 Schematic Diagram 2. Outdoor Unit Service Manual 47...
  • Page 48 Schematic Diagram 48 Multi type Air Conditioner...

  • Page 49: Wiring Diagram

    Schematic Diagram Wiring Diagram 1. Room Type Indoor Unit 2. Outdoor Unit 1) DMH24DB-1 2) DMC24DB-1 Service Manual 49...

  • Page 50: Components Locations

    Schematic Diagram Components Locations 1. Indoor Unit MAIN P.C.B ASM 1) Split Type • TOP VIEW PCB :6870A90409B ASSY:6871A20771 6871A20782 • BOTTOM VIEW 50 Multi type Air Conditioner...
  • Page 51 Schematic Diagram 2. Display ASSEMBLY 1) Split Type (6871A20680) Service Manual 51...
  • Page 52 Schematic Diagram 3. Outdoor Unit 1) Component side 52 Multi type Air Conditioner...
  • Page 53 Schematic Diagram 2) Solder side Service Manual 53...

  • Page 54: Troubleshooting Guide

    R/Valve 9.52 Ø 5220AR3228E strainer Sensor High Pres. Switch Eva. Sensor C/V2 C/V1 Sensor A-Room B-Room Cons. Cons. Acc. Comp Comp (GK094K) (GK141K) Eva. Sensor LEV-B Sensor LEV-A 6.35 Ø LEV 15RC strainer 2. DMC24DB-1 54 Multi type Air Conditioner...

  • Page 55: Self-Diagnosis Function

    Troubleshooting Guide Self-diagnosis Function 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. •...

  • Page 56: Cycle Troubleshooting Guide

    Troubleshooting Guide Cycle Troubleshooting Guide Trouble analysis 1. Check temperature difference between intake and discharge air, and operating current. Temp. difference : approx. 0°C(0°F) All amount of refrigerant leaked out. Current : less than 80% of Check refrigeration cycle. rated current Temp.

  • Page 57: Electronic Parts Troubleshooting Guide

    Troubleshooting Guide Electronic Parts Troubleshooting Guide Refer to electronic contorol device drawing & schematic diagram. The Product doesn’t operate at all. Trouble 1 Turn off the main power and wait until LED on outdoor PCB is off. Turn on the main power again. Does "Beeping"...
  • Page 58 Troubleshooting Guide Product doesn't operate with the remote controller. Trouble 2 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 not controlled by the remote controller.
  • Page 59 Troubleshooting Guide The Compressor/Outdoor Fan are don't operate Trouble 3 Turn on the main power. Operate Cooling Mode by setting the disired temperature of the remote controller is less than one of the Indoor temperature by 1°C at least. When in air circulation mode, compressor/outdoor fan is stopped. Check the sensor for Indoor temperature is attatched as close as to be effected by the themperature of Heat Exchange (EVA.) When the sensor circuit for Indoor temperature and connector are in bad connection or are...

  • Page 60: When Indoor Fan Does Not Operate

    Troubleshooting Guide When indoor Fan does not operate. Trouble 4 When indoor Fan does not operate. Does the voltage of each terminals of CN-MOTOR CONNECTOR in Indoor unit corresponds to values in the Table of page 69 Does the voltage of terminal of CN-DC/DC CONNECTOR in Check connecting condition of the CN-MOTOR CON- Indoor unit corresponds to the values in the table of page 56 NECTOR...

  • Page 61: When The Louver Does Not Operate

    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

    Troubleshooting Guide Error Code Trouble Shooting Error Title Cause of error Check point & Normal condition code • Open / Short Normal resistor : 10K / at 25°C(77°F) (Unplugged) Indoor air sensor • Soldered poorly Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged) •...
  • Page 63 Troubleshooting Guide Error Title Cause of error Check point & Normal condition code • Power input AC 230V.(Outdoor, Indoor) • The connector for transmission is disconnected. • The connecting wires are misconnected. Communication 05 / 53 • The GND 1,2 is not connected at main GND. (Indoor Outdoor) •...
  • Page 64 Troubleshooting Guide Error Title Cause of error Check point & Normal condition code • Check the discharge pipe sensor. • Discharge sensor • Check the install condition for over load. D-Pipe Temp. High temp. high • Check the leakage of refrigerent. •...
  • Page 65 Troubleshooting Guide Error Title Cause of error Check point & Normal condition code • Open / Short Normal resistor : 10K / at 25°C(77°F) (Unplugged) Outdoor air sensor • Soldered poorly Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged) • Internal circuit error •...

  • Page 66: 2-Way, 3-Way Valve

    2-way, 3-way Valve 2-way, 3-way Valve 2-way Valve (Liguid Side) 3-way Valve (Gas Side) Valve cap Hexagonal wrench Open position (4mm) Closed position Flare nut Flare nut Open position Closed position piping piping Service Service connection connection port cap port To outdoor unit To outdoor unit Works...

  • Page 67: Pumping Down

    2-way, 3-way Valve (1) Pumping down Liquid side Indoor unit Outdoor unit Close 2-Way valve Gas side Open 3-Way valve Liquid side Indoor unit Close 2-Way valve Gas side Open 3-Way valve manifold gauge Low- handle Hi- handle (CLOSE) (CLOSE) Procedure •...
  • Page 68 2-way, 3-way Valve (2) Evacuation (All amount of refrigerant leaked) Liquid side Indoor unit Outdoor unit Open 2-Way valve Gas side Open 3-Way valve Liquid side Indoor unit Open 2-Way valve Gas side Open 3-Way valve manifold gauge Vacuum pump Low- handle Hi- handle...

  • Page 69: Gas Charging

    2-way, 3-way Valve (3) Gas Charging (After Evacuation) Liquid side Indoor unit Outdoor unit Open 2-Way valve Gas side Open 3-Way valve Liquid side Indoor unit Open 2-Way valve Gas side Open 3-Way valve manifold gauge Charging cylinder Low-handle (OPEN) Hi- handle Check valve (OPEN)
  • Page 70 Specifications and performance data subject to change without notice. HEAT CONTROLLER, INC. 1900 WELLWORTH AVENUE • JACKSON, MICHIGAN 49203 THE QUALITY LEADER IN CONDITIONING AIR P/No.:3828A20390U...

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