Heat Controller DMH18DB-1 - Manuals

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 ...

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...

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...

10 Multi type Air Conditioner Dimensions Dimensions Indoor Unit Split Type Indoor Installation plate D H W W mm(in) 870(34.2) H mm(in) 270(10.6) D mm(in) 153(6) Model Dimension Split Type(S4) 9 kBtu/h

Service Manual 11 Outdoor Unit W D L1 L2 L4 L3 H L7 L5 L6 W mm(in) 870(34.3) H mm(in) 655(25.8) 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) UE 18kBtu/h MODEL DIM Dimensions

12 Multi type Air Conditioner Product Specifications Product Specifications Nominal Capacity Cooling kW (Min~Rating~Max) Btu/h Heating kW Btu/h Nominal Input Cooling kW (Min~Rating~Max) Heating kW Testing CombinationRunning Current(Rating) Cooling A Heating A Starting Current Cooling/Heating A Power...

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...

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 ...

16 Multi type Air Conditioner Installation Multi Piping Type Piping length and elevation 18k 30m(100ft) 15m(50ft) 5m(16ft) 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...

Service Manual 17 Installation The wall you select should be strong and solidenough to 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 cen...

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...

Service Manual 19 Flaring Work and Connection of Piping Check 1. Compare the flared work with the figure. 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 tubi...

22 Multi type Air Conditioner Wrap the insulation material around the connectingportion. 1. Overlap the connection pipe heat insulation and the indoor unit pipe heat insulation material. Bind themtogether with vinyl tape so that there may be no gap. 2. Wrap the area which accommodates the rear pipin...

24 Multi type Air Conditioner Outdoor Align the center of the pipings and sufficiently tightenthe flare nut 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 ont...

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 individu-ally according to the outdoor unit connection. (Ensure that the color of the wires of the outdoor unit and the ter- minal No. are the sa...

26 Multi type Air Conditioner 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 screw.Connect the wires to the terminals on the controlboard individually as the following. 2. Secure the cable in...

Service Manual 27 Connecting the Cable between Indoor Unit and Outdoor Unit (1) Remove two-caps on the conduit panel. (for low voltage line) (2) Pull out connection cable through conduit.(3) After conduit to the panel, fix nut to the opposite side of panel (4) Pass the conneciton cable through the h...

28 Multi type Air Conditioner Connecting the Cable between Indoor Unit and Outdoor Unit Connect the cable to the indoor unit CAUTION! Provide a circuit breaker between the power source and the outdoorunit as shown below. Size breaker per the Maximum Fuse or Circuit Breaker (MOC) rating on the unit r...

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 thedrain exit. Drain 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...

Service Manual 31 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 c...

32 Multi type Air Conditioner Checking the Drainage, Forming the Pipings and Long Pipe Setting 1. Connect the charge hose end described in the pre- ceding steps to the vacuum pump to evacuate thetubing and indoor unit.Confirm the "Lo" knob of the manifold valve is open.Then, run the vacuum p...

Service Manual 33 Charging ■ Each outdoor unit is factory charged (nameplate charge) for the evaporator as well as a 7.5m(25ft) line set foreach indoor line. Any time total line set is used either shorter or longer then the nominal 15m(50ft) line set length the refrigerantcharge has to be adjusted. ...

34 Multi type Air Conditioner Test Running Test Running 1. Check that all tubing and wiring have been properly connected. 2. Check that the gas and liquid side service valves are fully open. Prepare remote control Remove the battery cover by pulling it according to thearrow direction.Insert new batt...

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 ...

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 ...

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...

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 ...

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...

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...

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...

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 ...

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 ...

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...

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...

46 Multi type Air Conditioner Schematic Diagram Schematic Diagram Electronic Control Device 1. Indoor Unit 1) Split Type

Service Manual 49 1. Room Type Indoor Unit Wiring Diagram Schematic Diagram 2. Outdoor Unit

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

54 Multi type Air Conditioner Troubleshooting Guide Troubleshooting Guide Refrigeration Cycle Diagram Refrigerent Flow Cooling Heating C/V1 C/V2 High Pressure S/W A cc B Comp A Comp Strainer Th1 Th2 Th3 Th4 Th5 Th6 Th7 Th8 Th9 Th10 Ø 6.35 EEV EEV Ø 6.35 Ø 9.52 Ø 9.52 Indoor Outdoor LOC. Description ...

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...

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 ...

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&...

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 ...

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...

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...

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 •...

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...

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...

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...

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...