Heat Controller DMC12SB-0 Service Manual
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Heat Controller DMC12SB-0 Service Manual

Heat Controller DMC12SB-0 Service Manual

Wall mounted mini-split system single-zone air conditioning/heat pump
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HEAT CONTROLLER, INC.

Wall Mounted

Mini-Split System
Single-Zone
Air Conditioning/Heat Pump

Service Manual

DMC09SB-0/DMH09SB-0
DMC12SB-0/DMH12SB-0
DMC18SB-1/DMH18SB-1
DMC24SB-1/DMH24SB-1
Before servicing the unit, read the
"safety precautions" in this manual.
Only for authorized service personnel.

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  • Page 1: Wall Mounted

    HEAT CONTROLLER, INC. Wall Mounted Mini-Split System Single-Zone Air Conditioning/Heat Pump Service Manual DMC09SB-0/DMH09SB-0 DMC12SB-0/DMH12SB-0 DMC18SB-1/DMH18SB-1 DMC24SB-1/DMH24SB-1 Before servicing the unit, read the “safety precautions” in this manual. Only for authorized service personnel.

  • Page 2: Table Of Contents

    Air Conditioner Service Manual TABLE OF CONTENTS Safety Precautions............................3 Dimensions..............................9 Symbols Used in this Manual ........................9 Indoor Unit..............................9 Outdoor Unit.............................11 Introduction ..............................12 Installation ..............................13 Selection of the Best Location........................16 Piping Length and Elevation........................17 How to Fix Installation Plate ........................18 Drill a Hole in the Wall ..........................18 Drain hose junction...........................18 Flaring work and connection of piping .......................19 Flaring work..............................19...

  • Page 3: 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. This symbol indicates the possibility of death or serious injury.
  • Page 4 Safety Precautions Be sure the installation area does Install the indoor unit on the wall Do not handle the pipe by your- not deteriorate with age. where the height from the floors self(Costomer) more than 8ft(2.4m) • If the base collapses, the air condi- •...
  • Page 5 Safety Precautions Stop operation and close any win- Do not open the inlet grill of the When the product is soaked (flood- dow in storm or hurricane before product during operation. (Do not ed or submerged), contact an the hurricane arrives. touch the electrostatic filter, if the Authorized Service Center.
  • Page 6 Safety Precautions Installation Always check for gas(refrigerant) Install the drain hose to ensure that Keep level even when installing the leakage after installation or repair water is drained away properly. product. of product. • Low refrigerant levels may cause • A bad connection may cause water •...
  • Page 7 Safety Precautions Use a soft cloth to clean. Do not touch the metal parts of the Do not step on or put anything on Do not use harsh detergents, sol- product when removing the air fil- the product. (outdoor unit) vents, etc.
  • Page 8 Dimensions Dimensions Indoor Unit Installation plate Model 9 Btu Series 9 Btu Series 12 Btu Series (C/O) (H/P) Dimension mm(inch) 840(33.1) 894(35.2) 894(35.2) mm(inch) 270(10.6) 295(11.6) 295(11.6) mm(inch) 153(6.0) 165(6.5) 165(6.5) 8 Room Air Conditioner...

  • Page 9: Dimensions

    Dimensions Installation plate Model 18 Btu Series 24 Btu Series Dimension mm(inch) 1090(42.9) 1090(42.9) mm(inch) 300(11.8) 300(11.8) mm(inch) 178(7.0) 178(7.0) Service Manual 9...
  • Page 10 Dimensions Outdoor Unit 1. 9k, 12k Gas side (3-way valve) Liquid side (2-way valve) MODEL 9k, 12k unit mm(inch) 770(30.3) mm(inch) 540(21.3) mm(inch) 245(9.6) mm(inch) 287(11.3) mm(inch) 64(2.5) mm(inch) 518(20.4) mm(inch) 10(0.4) mm(inch) 100(3.9) 10 Room Air Conditioner...
  • Page 11 Dimensions 2. 18k, 24k MODEL 18k, 24k mm(inch) 870(34.3) mm(inch) 655(25.8) mm(inch) 320(12.6) mm(inch) 370(14.6) mm(inch) 25(1.0) mm(inch) 630(24.8) mm(inch) 25(1.0) mm(inch) 546(21.5) mm(inch) 162(6.4) mm(inch) 162(6.4) mm(inch) 54(2.1) mm(inch) 74.5(2.9) mm(inch) 79(3.1) Service Manual 11...

  • Page 12: Symbols Used In This Manual

    Introduction Introduction Symbols Used In This Manual This symbol alerts you to the risk of electric shock. This symbol alerts you to hazards that may cause harm to the air condi- tioner. NOTICE This symbol indicates special notes. Features Air Inlet Front Panel Air Filter Signal Receptor...

  • Page 13: Installation

    Introduction 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 14 Installation Installation Map NOTICE Installation parts you should purchase. Installation plate Sleeve Bushing-Sleeve Putty(Gum Type Sealer) Bend the pipe as closely on the wall as possible, but be careful that it doesn't break. Air Discharge Operation Indication Lamps/ Vinyl tape (Wide) Signal Receptor •...
  • Page 15 Installation Confirm The Refrigerant 1. Check the quality label on the indoor and outdoor unit. 2. Make certain that the refrigerant is R-410A. NOTICE THIS PRODUCT CONTAINS R-410A REFRIGERANT 1) Different compressor oil - R-410A(Polyol ester) / R-22(Mineral). - Do not mix the existing mineral oil. - Do not apply used pipe, tools and gauges covered with the existing mineral oil.

  • Page 16: Indoor Unit

    Installation Select The Best Location Indoor unit 6. Use a stud finder to locate studs to prevent unnecessary damage to the wall. 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.

  • Page 17: Piping Length And Elevation

    Installation Piping Length And Elevation Standard Max. Max. Pipe Size Capacity Additional Refrigerant Length Elevation length g/m(oz/ft) (Btu/h) Suction Evap m(ft) m(ft) m(ft) 3/8" 1/4" 7.5(25) 7.5(25) 15(49) 20(0.22) 1/2" 1/4" 7.5(25) 7.5(25) 15(49) 20(0.22) 1/2" 1/4" 7.5(25) 7.5(25) 15(49) 20(0.22) 1/2"...

  • Page 18: How To Fix Installation Plate

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

  • Page 19: Flaring Work And Connection Of Piping

    Installation Flaring Work Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the follow- ing procedure. Cut the pipes and the cable. 1. Use the piping kit accessory or the pipes purchased locally.

  • Page 20: Connection Of Piping Indoor

    Installation Connecting The Piping Indoor 1. Prepare the indoor unit's piping and drain hose for installation through the wall. 2. Remove the plastic tubing retainer(see the illus- tration by) and pull the tubing and drain hose away from chassis. 3. Replace only the plastic tubing holder 1, not the holder 2 in the original position.
  • Page 21 Installation Connecting the pipings to the indoor unit Wrap the insulation material around the and drain hose to drain pipe. connecting portion. • Put a couple drops of refrigerant oil on the face • Overlap the connection pipe insulation material of the flare before assembling taking care not to and the indoor unit pipe insulation material.
  • Page 22 Installation Insert the connecting cable into the indoor unit. Spanner (fixed) • Don't connect the cable to the indoor unit. Flare nut • Make a small loop with the cable for easy con- Connection pipe Torque wrench nection later. Indoor unit tubing Tape the drain hose and the connecting cable.
  • Page 23 Installation • Wrap the area which accommodates the rear Reroute the pipings and the drain hose piping housing section with vinyl tape. across the back of the chassis. Indoor Connection unit piping pipe Vinyl tape Wrap with vinyl tape (wide) Piping for Pipe passage through...
  • Page 24 Installation Installation Information. For left piping. Follow the instruction below. Correct case • Press on the upper side of clamp and unfold the tubing to downward slowly. Incorrect case • Following bending type from right to left may cause damage to the tubing. 24 Room Air Conditioner...
  • Page 25 Installation Connection Of The Drain Hose • The drain hose can be connected at two different positions. Use the most convenient position and, if necessary, exchange the position of the drain pan, rubber cap and the drain hose. Drain pan Rubber cap Drain hose Exchange if necessary...

  • Page 26: Connection Of The Pipes-Outdoor

    Installation Connection Of The Cable 1. Remove the cover control from the unit by Wiring Diagram loosening the 3 screws. Connecting cable(Low voltage) b 2. Dismount caps on the conduit panel. Indoor Unit Outdoor Unit Terminal Terminal 3. Temporarily mount the conduit tubes on the (4P) (6P) conduit panel.
  • Page 27 Installation After the confirmation of the above conditions, prepare the wiring as follows: 1) Never fail to have an individual power circuit specifically for the air conditioner. As for the method of wiring, be guided by the circuit diagram posted on the inside of control cover. 2) The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from vibrations to which the unit is subjected during the course of transportation.

  • Page 28: Checking The Drainage And Forming The Pipings

    Installation Checking The Drainage • Pour a glass of water on the drain pan. • Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the drain exit. Connecting area drain hose Leakage checking Drain pan...

  • Page 29: Form The Piping

    Installation Forming The Piping In cases where the Outdoor unit is Form the piping by wrapping the connect- installed above the Indoor unit perform ing portion of the indoor unit with insula- the following. tion material and secure it with two kinds of vinyl tapes.

  • Page 30: Air Purging

    Installation Air Purging Air and moisture remaining in the refrigerant system have undesirable effects as indicated below. • Pressure in the system rises. • Operating current rises. • Cooling(or heating) efficiency drops. • Moisture in the refrigerant circuit may freeze and block capillary tubing. •...

  • Page 31: Finishing The Job

    Installation Soap water method Suction Line (1) Remove the caps from the gas side and liquid side valves. (2) Remove the service-port cap from the gas side valve. (3) To open the gas side valve turn the valve stem counterclockwise approximately 90°, wait for about Evaporator Line 2~3 seconds, and close it.
  • Page 32 Installation Charging Each outdoor unit is factory charged (nameplate charge) for the evaporator as well as a 7.5m(25ft) line set. Any time a line set is used either shorter or longer then the nominal 7.5m(25ft) line set length the refrigerant charge has to be adjusted. Whether the line set is made shorter or longer you must adjust the charge based on how many ft of tubing are either added or removed based on 20g(0.22oz) of R-410A per meter(foot).

  • Page 33: Test Running

    Test Running Test Running 1. Check that all tubing and wiring have been 2. Measure the temperature of the intake and discharge properly connected. of air. 2. Check that the gas and liquid side service 3. Ensure the difference between the intake tem- valves are fully open.

  • Page 34: Operation

    Operation Operation Function of Controls • DISPLAY 1) C/O Model 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) Timer Indicator •...
  • Page 35 Operation • While in compressor off, the indoor fan repeats low airflow speed and pause. • While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehu- midification operation and 4-min compressor off repeat. Compressor ON Temp. ➲ Setting Temp+0.5°C(0.9°F) Compressor OFF Temp.
  • Page 36 Operation Airflow Speed Selection • The airflow speed of the indoor fan is set to high, medium, low, or chaos (auto) by the input of the airflow speed selection key on the remote control. Sleep Timer Operation • When the sleep time is reached after <1,2,3,4,5,6,7,0(cancel) hr> is input by the remote control while in appliance operation, the operation of the appliance stops.
  • Page 37 Operation Forced operation • Operation procedures when the remote control can't be used. • The operation will be started if the power button is pressed. • If you want to stop operation, re-press the button. Heat pump Model Cooling Model Room Temp.

  • Page 38: Display Function

    Operation Display Function 1. Heating Model 2. Cooling Model Operation Indicator Operation Indicator • Cooling, Soft Dry, Fan, Heating • Cooling, Soft Dry, Fan Compressor on Indicator Deicer Indicator • Hot-start, Deice Self-diagnosis Function Error Error Display LED Error contents SVC check point Code (Indoor body operation LED)

  • Page 39: Remote Control Operations

    Operation Remote Control Operations The controls will look like the following. 1. START/STOP BUTTON Operation starts when this button is pressed and stops when the button is pressed again. Signal transmitter 2. OPERATION MODE SELECTION BUTTON Used to select the operation mode. 3.

  • Page 40: Disassembly

    Operation Disassembly 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 41 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 42 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 43: Troubleshooting Guide

    Troubleshooting Guide Troubleshooting Guide Refrigeration Cycle Diagram (1) Cooling Only Models INDOOR UNIT OUTDOOR UNIT LIQUID SIDE CAPILLARY TUBE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) GAS SIDE COMPRESSOR (2) Cooling & Heating Models INDOOR UNIT OUTDOOR UNIT CHECK VALVE LIQUID SIDE (Heating Model only) 3-WAY VALVE CAPILLARY TUBE...

  • Page 44: 2-Way, 3-Way Valve

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

  • Page 45: Pumping Down

    Troubleshooting Guide Pumping Down Liquid side Indoor unit Outdoor unit Open 2-Way valve Gas side Closed 3-Way valve CLOSE CLOSE Purge the air • Procedure (6) Operate the air conditioner at the cooling (1) Confirm that both the 2-way and 3-way cycle and stop it when the gauge indi- valves are set to the open position.
  • Page 46 Troubleshooting Guide Balance Refrigerant of the 3-way Valve (Gas leakage) Liquid side Indoor unit Outdoor unit 3-Way valve Open Gas side 3-Way valve Open OPEN CLOSE • Procedure (1) Confirm that both the 2-way and 3-way (3) Open the valve (Lo side) on the charge set valves are set to the back seat.
  • Page 47 Troubleshooting Guide Evacuation (All amount of refrigerant leaked) Liquid side Indoor unit Outdoor unit 3-Way valve Open Gas side 3-Way valve Open Vacuum pump OPEN CLOSE • Procedure (1) Connect the vacuum pump to the center (3) Close the valve (Lo side) on the charge hose of charge set center hose set, turn off the vacuum pump, and con- firm that the gauge needle does not move...

  • Page 48: Gas Charging

    Troubleshooting Guide Gas Charging (After Evacuation) Liquid side Indoor unit Open Outdoor unit 3-Way valve Gas side Open 3-Way valve Check valve Charging cylinder OPEN CLOSE • Procedure This is different from previous procedures. (1) Connect the charge hose to the charging Because you are charging with liquid refrigerant cylinder.
  • Page 49 Troubleshooting Guide Additional gas charging (Gas leakage) • When refrigerant is insufficient by leakage, recharge the unit with the refrigerant up to normal oper- ating suction pressure. • Use the graph or the equation below to get operating suction pressure according to indoor and out- door temperature.

  • Page 50: Cycle Parts

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

  • Page 51: Electronic Parts

    Troubleshooting Guide Electronic Parts (9k model) Product does not operate at all. (* Refer to Electronic Control Device drawing and Schematic diagram.) Turn off Main Power (After 20 seconds) Turn on Main Power Does "beeping" sound is made from the Indoor Unit? Primarily, the operating condition of Micom is OK.
  • Page 52 Troubleshooting Guide Electronic Parts (18k model) Product does not operate at all. (* Refer to Electronic Control Device drawing and Schematic diagram.) Turn off Main Power (After 20 seconds) Turn on Main Power Does "beeping" sound is made from the Indoor Unit? Primarily, the operating condition of Micom is OK.

  • Page 53: The Product Is Not Operate With The Remote Controller

    Troubleshooting Guide The product is not operate with the remote controller. 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 54 Troubleshooting Guide Compressor/Outdoor Fan are unable to drive.(9k Model) Turn on Main Power Operate "Cooling Mode( )" by setting the desired temperature of the remote controller is less than one of the indoor temperature by 2°F at least. When in Fan Mode, Compressor/Outdoor Fan is stopped. Check the sensor for indoor temperature is attached as close as to be effected by the temperature of Heat Exchanger(EVA).
  • Page 55 Troubleshooting Guide Compressor/Outdoor Fan are unable to drive.(18k Model) Turn on Main Power Operate "Cooling Mode( )" by setting the desired temperature of the remote controller is less than one of the indoor temperature by 2°F at least. When in Fan Mode, Compressor/Outdoor Fan is stopped. Check the sensor for indoor temperature is attached as close as to be effected by the temperature of Heat Exchanger(EVA).

  • Page 56: When Indoor Fan Does Not Operate

    Troubleshooting Guide 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 56 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 Do the voltage of terminal of...

  • Page 57: When Vertical Louver Does Not Operate

    Troubleshooting Guide 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 • Check the connecting condition of CN-UP/DOWN Connector •...

  • Page 58: When A Comunication Error Occurs

    Troubleshooting Guide When a comunication error occurs. • The operation indicator of Indoor unit blinks five times. • The red indicator of Outdoor unit blinks five times. Check the connecting wires between Indoor and Outdoor unit for the connecting error and the contacting condition. Check the installation condition of outdoor unit.
  • Page 59 Troubleshooting Guide The phenomena in case of connecting error INDOOR UNIT Connector Type Phenomena Condition CN-DC/DC Open and connecting error • The same as the phenomenon of Outdoor Unit. Blue Black Brown • The indoor fan does not operate. CN-MOTOR Open •...
  • Page 60 Troubleshooting Guide OUTDOOR UNIT Connector Type Phenomena Condition • All functions stop. • The operation with the remote controller, forced and OPEN test one do not operate. CN-POWER Connecting reversely • PWB pattern is damaged when applying the power. • All functions stop or the compressor does not operate. OPEN •...

  • Page 61: Schematic Diagram

    Schematic Diagram Schematic Diagram Electric Control Device Indoor Service Manual 61...
  • Page 62 Schematic Diagram Outdoor (9k, 12k) 62 Room Air Conditioner...
  • Page 63 Schematic Diagram Outdoor (18k, 24k) Service Manual 63...

  • Page 64: Wiring Diagram

    Schematic Diagram Wiring Diagram Indoor Unit Models: 9k, 12k, 18k, 24k 64 Room Air Conditioner...
  • Page 65 Schematic Diagram Outdoor Unit Models: 9k(C/O) Models: 12k(H/P), 12k(C/O, H/P) Service Manual 65...
  • Page 66 Schematic Diagram Models: 18k(C/O) Models: 18k(H/P), 24k(C/O, H/P) 66 Room Air Conditioner...

  • Page 67: Components Location

    Schematic Diagram Components Location Indoor MAIN P.W.B ASSEMBLY • TOP VIEW • BOTTOM VIEW Service Manual 67...
  • Page 68 Schematic Diagram Outdoor(9k, 12k) • TOP VIEW • BOTTOM VIEW 68 Room Air Conditioner...
  • Page 69 Schematic Diagram Outdoor(18k, 24k) • TOP VIEW • BOTTOM VIEW Service Manual 69...
  • Page 70 Schematic Diagram DISPLAY ASSEMBLY – 6870A90240D – 6870A90240E 70 Room Air Conditioner...

  • Page 71: Product Specifications

    Product Specifications Product Specifications Cooling Only Model Name DMC09SB-0 DMC12SB-0 DMC18SB-1 DMC24SB-1 Item Unit Power Supply Ø, V, Hz 1, 115V, 60 1, 115V, 60 1, 230/208, 60 1, 230/208 , 60 Cooling Capacity BTU/h 9,000 11,500 18,000/17,800 22,100/22,500 Input...
  • Page 72 Product Specifications Cooling & Heating Items Unit DMH09SB-0 DMH12SB-0 DMH18SB-1 DMH24SB-1 Power Supply ø, V, Hz 1, 115V, 60 1, 115V, 60 1, 230/208 , 60 1, 230/208 , 60 Cooling Capacity BTU/h 9,800 11,500 19,000/19,500 22,100/22,500 9,800 11,500 19,000/19,500 22,100/22,500 Heating Capacity BTU/h...
  • Page 73 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.:3828A20390T...

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