Heat Controller DMH24SB-1 - Manuals

Service Manual 7 Safety Precautions Use a soft cloth to clean. Do not use harsh detergents, sol-vents, etc. • There is risk of fire, electric shock or damage to the plastic parts of theproduct. Do not touch the metal parts of theproduct when removing the air fil-ter. They are very sharp! • There is ...

8 Room Air Conditioner Dimensions Dimensions D H W Installation plate W mm(inch) 840(33.1) 894(35.2) 894(35.2) H mm(inch) 270(10.6) 295(11.6) 295(11.6) D mm(inch) 153(6.0) 165(6.5) 165(6.5) Model Dimension 9 Btu Series (C/O) 9 Btu Series (H/P) 12 Btu Series Indoor Unit

10 Room Air Conditioner Dimensions Outdoor Unit 1. 9k, 12k W L2 L3 L1 D H L4 L5 Gas side (3-way valve) Liquid side (2-way valve) MODEL 9k, 12k DIM unit W mm(inch) 770(30.3) H mm(inch) 540(21.3) D mm(inch) 245(9.6) L1 mm(inch) 287(11.3) L2 mm(inch) 64(2.5) L3 mm(inch) 518(20.4) L4 mm(inch) 10(0.4) L5...

12 Room Air Conditioner Introduction Introduction 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. This symbol indicates special notes. NOTICE Symbols Used In This Manual Features Air Intake Vents Air Outlet Vents Co...

Service Manual 13 Introduction 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 Ammeter Gas Leak Detector Ther...

14 Room Air Conditioner Installation Installation Map Base Plate Air Inlet Vents Air Outlet Vents Installation parts you should purchase. Air Discharge Forced Operation Button Operation Indication Lamps/ Signal Receptor Vinyl tape (Wide) • Apply after carrying out a drainage test.• To carry out the ...

Service Manual 15 Installation 1. Check the quality label on the indoor and outdoor unit. 2. Make certain that the refrigerant is R-410A. 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 u...

16 Room Air Conditioner Outdoor unit 1. If an awning is built over the unit to prevent direct sunlight or rain exposure, make sure thatheat radiation from the condenser is notrestricted. 2. Ensure that the space around the back and sides is more than 10cm(3.9in). The front of theunit should have mor...

Service Manual 17 Piping Length And Elevation • Capacity is based on standard length and maximum allowance length is on the basis of reliability.• Oil trap should be installed every 5~7meters (16.4~23.0ft). In case more than 5m(16.4ft) Outdoor unit Indoor unit A B A Oil trap Outdoor unit Indoor unit...

18 Room Air Conditioner The wall you select should be strong and solid enoughto prevent vibration 1. Mount the installation plate on the wall with type "A" screws. If mounting the unit on a concretewall, use anchor bolts. • Mount the installation plate horizontally by aligning the centerline...

Service Manual 19 Flaring Work Cut the pipes and the cable. 1. Use the piping kit accessory or the pipes purchased locally. 2. Measure the distance between the indoor and the out- door unit. 3. Cut the pipes a little longer than measured distance.4. Cut the cable 1.5m(59.1in) longer than the pipe le...

20 Room Air Conditioner 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 hoseaway from chassis. 3. Replace only the plastic tubing holder 1, not the holder 2 in ...

Service Manual 21 Wrap the insulation material around theconnecting portion. • Overlap the connection pipe insulation material and the indoor unit pipe insulation material. Bindthem together with vinyl tape so that there is nogap. Route the indoor tubing and the drainhose to the required piping hole...

22 Room Air Conditioner Insert the connecting cable into the indoorunit. • Don't connect the cable to the indoor unit. • Make a small loop with the cable for easy con- nection later. Tape the drain hose and the connecting cable. • Connecting cable Connecting the pipings to the indoor unitand the dra...

Service Manual 23 Reroute the pipings and the drain hoseacross the back of the chassis. Reroute the pipings and the drain hoseacross the back of the chassis. Drain hose Vinyl tape(narrow) Pipe Wrap with vinyl tape(wide) • Bundle the piping and drain hose together by wrapping them with cloth tape ove...

24 Room Air Conditioner 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. Installation

Service Manual 25 Put a couple drops of refrigerant oil onthe face of the flare before assemblingtaking care not to add any contaminants. Align the center of the pipings and suffi-ciently tighten the flare nut by hand. • The drain hose can be connected at two different positions. Use the most conven...

26 Room Air Conditioner Connection Of The Cable 1 Indoor Unit Outdoor Unit 2 3 4 1 2 3 4 5 6 G Tobranchcircuit Ground Power supply a L1 * L2 Connecting cable(Low voltage) b Terminal (4P) Terminal (6P) Outdoor unit Wiring Diagram Terminal block Over 5mm (0.2") Cover control Conduit panel Connecti...

Service Manual 27 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 w...

28 Room Air Conditioner 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. Drain piping • The drain hose should point downward for easy drain flow. Drain pan Drain hose Le...

Service Manual 29 Forming The Piping Form the piping by wrapping the connect-ing portion of the indoor unit with insula-tion material and secure it with two kindsof vinyl tapes. • If you want to connect an additional drain hose, the end of the drain outlet should be routedabove the ground. Secure th...

30 Room Air Conditioner Air Purging Air purging With Vacuum Pump Lo Hi Indoor unit Outdoor unit Manifold valve Charge hose Nitrogen gascylinder(in verticalstanding position) Pressure gauge Air and moisture remaining in the refrigerant system have undesirable effects as indicated below. • Pressure in...

Service Manual 31 Evacuation • Connect the charge hose end described in the preceding steps to the vacuum pump to evacuatethe tubing and indoor unit.Confirm the "Lo" knob of the manifold valve isopen. Then, run the vacuum pump.The operation time for evacuation varies with tub-ing length and ...

32 Room Air Conditioner 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 setlength the refrigerant charge has to be adjusted. ■ Whether the line...

Service Manual 33 Outside ambient TEMP. The pressure of the gas side service valve 95°F(35°C) 8.5~9.5kg/cm 2 G(120~135 P.S.I.G.) Settlement of outdoor unit ■ Anchor the outdoor unit with a bolt andnut(ø10mm(0.39in) tightly and horizontally on aconcrete or rigid mount. ■ When installing on the wall, ...

Operation Function of Controls Operation • 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 • ON while in timer mode (on/off), OFF when timer mod...

Service Manual 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...

36 Room Air Conditioner ■ 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>...

Service Manual 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. • While in forced operation, the key input by the remote control has no ef...

38 Room Air Conditioner Self-diagnosis Function Display Function 1. Heating Model 2. Cooling Model • Cooling, Soft Dry, Fan, Heating • Cooling, Soft Dry, Fan • Hot-start, Deice Operation Indicator Deicer Indicator Operation Indicator Compressor on Indicator 3sec 3sec 3sec (once) Error Code 1 Error D...

Service Manual 39 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. 2. OPERATION MODE SELECTION BUTTON Used to select the operation mode. 3. ROOM TEMPERATURE SET...

40 Room Air Conditioner 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. • Remove the...

Service Manual 41 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 Evaporator. • R...

42 Room Air Conditioner • 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 the Cros...

Service Manual 43 Troubleshooting Guide Troubleshooting Guide INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT HEATEXCHANGE(EVAPORATOR) HEATEXCHANGE(EVAPORATOR) HEATEXCHANGE(CONDENSER) HEATEXCHANGE(CONDENSER) COMPRESSOR COMPRESSOR ACCUMULATOR GAS SIDE GAS SIDE 3-WAY VALVE LIQUID SIDE LIQUID SIDE 3-...

Service Manual 45 Troubleshooting Guide • Procedure (1) Confirm that both the 2-way and 3-way valves are set to the open position. – Remove the valve stem caps and confirm that the valve stems are in the raised posi-tion. – Be sure to use a hexagonal wrench to operate the valve stems. (2) Operate th...

46 Room Air Conditioner Troubleshooting Guide Balance Refrigerant of the 3-way Valve (Gas leakage) • Procedure (1) Confirm that both the 2-way and 3-way valves are set to the back seat. (2) Connect the charge set to the 3-way valve’s port. – Leave the valve on the charge set closed. – Connect the ch...

Service Manual 47 Troubleshooting Guide Evacuation (All amount of refrigerant leaked) • Procedure (1) Connect the vacuum pump to the center hose of charge set center hose (2) Evacuation for approximately one hour. – Confirm that the gauge needle has moved toward -76 cmHg (vacuum of 4 mmHg orless). (...

48 Room Air Conditioner Troubleshooting Guide Gas Charging (After Evacuation) • Procedure (1) Connect the charge hose to the charging cylinder. – Connect the charge hose which you dis- connected from the vacuum pump to thevalve at the bottom of the cylinder. – If you are using a gas cylinder, also u...

Service Manual 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 a...

50 Room Air Conditioner Troubleshooting Guide Trouble analysis 1. Check temperature difference between intake and discharge air and operating current. Temp. Difference Temp. difference : approx. 0°F(0°C)Current : less than 80% of rated current Temp. difference : approx. 14°F(8°C)Current : less than ...

Service Manual 51 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 Turn on Main Power Does "beeping" sound is made from the Indoor Unit? Primarily, the operating condit...

Service Manual 53 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. Caused by other parts except the remote controller Caus...

56 Room 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 CONNECTOR inO...

Service Manual 57 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/DOW...

58 Room Air Conditioner Troubleshooting Guide • 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 con...

Service Manual 59 Troubleshooting Guide The phenomena in case of connecting error INDOOR UNIT Connector Type Condition Open and connecting error Open Open Open Open Short between terminals ( and ) of ROOM-TH. Short between terminals ( and ) of PIPE-TH. Short between terminals • The same as the pheno...

60 Room Air Conditioner OUTDOOR UNIT Connector Type Condition OPEN • PWB pattern is damaged when applying the power. Connecting reversely Connecting reversely OPEN OPEN OPEN OPEN Connecting error ( ) Connecting error ( ) Connecting error ( ) Connecting error ( ) Connecting error ( ) Connecting error...

Service Manual 61 Schematic Diagram Schematic Diagram Electric Control Device ■ Indoor

64 Room Air Conditioner Schematic Diagram Wiring Diagram ■ Indoor Unit Models: 9k, 12k, 18k, 24k

Service Manual 65 ■ Outdoor Unit Models: 9k(C/O) Models: 12k(H/P), 12k(C/O, H/P) Schematic Diagram

Service Manual 67 Schematic Diagram Components Location ■ Indoor MAIN P.W.B ASSEMBLY • TOP VIEW • BOTTOM VIEW

68 Room Air Conditioner ■ Outdoor(9k, 12k) • TOP VIEW • BOTTOM VIEW Schematic Diagram

70 Room Air Conditioner DISPLAY ASSEMBLY – 6870A90240D – 6870A90240E Schematic Diagram

Service Manual 71 Product Specifications Product Specifications Power Supply Ø, V, Hz Cooling Capacity BTU/h Input W Running Current A COMP. Locked Rotor AMP. A S.E.E.RAir Circulation m 3 G/min(cfm) Moisture Removal l/h(pts/hr) Noise Level Indoor, High dB(A) (Sound Pressure, 1m) Med dB(A) Low dB(A) ...

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