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Manual Heat Controller DMH18DB-1

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  • Heat Controller DMH18DB-1 - page 1

    Wall Mounted Multi-Split System Air Conditioning/Heat Pump DMH18DB-1 Befor e servicing the unit, r ead the “safety pr ecautions” in this manual. Only for authorized service personnel. HEA T CONTR OLLER, INC. ...

  • Heat Controller DMH18DB-1 - page 2

    2 Multi type Air Conditioner Multi type Air Conditioner Ser vice Manual T ABLE OF CONTENTS Combination table ....................................................................................................................................... 3 Safety Precautions .................................................................................... ...

  • Heat Controller DMH18DB-1 - page 3

    Ser vice 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 9 99 9 18 9000 9000 - 9000 9000 18000 9000 18000 2.63 5.27 2.63 5.27 9000 9000 - 9000 Notes : 1.Cooling C ...

  • Heat Controller DMH18DB-1 - page 4

    4 Multi type Air Conditioner Saf ety Precautions Safety Precautions T o pre v ent injur y to the user or other people and proper ty damage, the f ollowing instructions must be f ollow ed. ■ Incorrect operation due to ignoring instruction will cause har m or damage. The seriousness is classified by the f ollowing indications . ■ Meanings of symb ...

  • Heat Controller DMH18DB-1 - page 5

    Ser vice Manual 5 Saf ety Precautions Do not install, remove, or re- install the unit by y ourself (customer). • There is risk of fire, electric shock, explosion, or injury. Be cautious when unpacking and installing the product. • Sharp edges could cause injury. Be especially careful of the case edges and the fins on the con- denser and evapora ...

  • Heat Controller DMH18DB-1 - page 6

    6 Multi type Air Conditioner Saf ety Precautions Do not open the inlet grill of the product during operation. (Do not touch the elec- trostatic filter , if the unit is so equipped.) • There is risk of physical injury, electric shock, or product failure. When the product is soaked (flooded or submerged), contact an A uthorized Service Center . • ...

  • Heat Controller DMH18DB-1 - page 7

    Ser vice Manual 7 Saf ety Precautions When the product is not to be used f or a long time , disconnect the power b y turning off the breaker . • There is risk of product damage or failure, or unintend- ed operation. T ake care to ensure that nobody could step on or fall onto the outdoor unit. • This could result in personal injury and product d ...

  • Heat Controller DMH18DB-1 - page 8

    8 Multi type Air Conditioner Saf ety Precautions Do not expose the skin direct- ly to cool air f or long periods of time. (Don't sit in the draft.) • This could harm to your health. Do not use the product f or special purposes, such as preserving foods, w orks of ar t, etc. It is a consumer air conditioner , not a precision refrigeration sys ...

  • Heat Controller DMH18DB-1 - page 9

    Ser vice Manual 9 Saf ety Precautions Do not rechar ge or disassemble the batteries. Do not dispose of batteries in a fire. • They may burn or explode. If the liquid from the batteries gets onto y our skin or clothes, wash it well with c lean water . Do not use the remote if the batteries have leaked. • The chemicals in batteries could cause bu ...

  • Heat Controller DMH18DB-1 - page 10

    10 Multi type Air Conditioner Dimensions Dimensions Indoor Unit Split T ype 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 T ype(S4) 9 kBtu/h ...

  • Heat Controller DMH18DB-1 - page 11

    Ser vice 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 ...

  • Heat Controller DMH18DB-1 - page 12

    12 Multi type Air Conditioner Product Specifications Pr oduct Specifications Nominal Capacity Cooling kW (Min~Rating~Max) Btu/h Heating kW Btu/h Nominal Input Cooling kW (Min~Rating~Max) Heating kW Testing Combination Running Current(Rating) Cooling A Heating A Starting Current Cooling/Heating A Power Supply Ø / V / Hz Power Supply Cable(Outdoor) ...

  • Heat Controller DMH18DB-1 - page 13

    Ser vice Manual 13 Product Specifications Power Supply Ø / V / Hz Cooling Capacity kW Btu/h Heating Capacity kW Btu/h Current Nominal Running Current A Fan Motor Type Fan Type Motor Output(W) x No. of Unit Air Flow Rate CMM (H / M / L) cfm External Static Pressure mmAq Capacitor µF / Vac Drive Coil Row x Column x FPI Dimensions (W x H x D) Body m ...

  • Heat Controller DMH18DB-1 - page 14

    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 Ammeter Gas Leak Detector Thermometer, Level Flarin ...

  • Heat Controller DMH18DB-1 - page 15

    Ser vice Manual 15 Installation Indoor unit 1. Do not hav e 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 dr ainage can be conv e- niently routed aw a y . 4. Do not install near a doorwa y . 5. Ensure the spaces indicated by arro ws from the wall, ceiling, f ence ...

  • Heat Controller DMH18DB-1 - page 16

    16 Multi type Air Conditioner Installation Multi Piping T ype Piping length and elev ation 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 Ele v ation between each indoor unit and out- door unit (h1) Max ele v ation between in ...

  • Heat Controller DMH18DB-1 - page 17

    Ser vice Manual 17 Installation The wall y ou select should be strong and solid enough to pre v ent vibration 1. Mount the installation plate on the wall with type "A" screws . If mounting the unit on a concrete wall, use anchor bolts . • Mount the installation plate horizontally b y aligning the centerline using a lev el. 2. Measure th ...

  • Heat Controller DMH18DB-1 - page 18

    18 Multi type Air Conditioner Flaring Work and Connection of Piping Flaring w ork Main cause f or gas leakage is due to def ect in flaring work. Carr y out correct flar ing work in the f ollowing procedure . Cut the pipes and the cable. 1. Use the piping kit accessor y or the pipes purchased locally . 2. Measure the distance between the indoor and ...

  • Heat Controller DMH18DB-1 - page 19

    Ser vice Manual 19 Flaring Work and Connection of Piping Check 1. Compare the flared work with the figure. 2. If a flared section is def ectiv e, cut it off and do flaring work again. Indoor 1. Prepare the indoor unit's piping and drain hose f or installation through the wall. 2. Remov e the plastic tubing retainer(see the illustra- tion) and ...

  • Heat Controller DMH18DB-1 - page 20

    20 Multi type Air Conditioner Flaring Work and Connection of Piping 4. Indoor unit installation Hook the indoor unit onto the upper por tion of the installation plate.(Engage the tw o hooks of the rear top of the indoor unit with the upper edge of the installation plate.) Ensure that the hooks are properly seated on the installation plate by mo vin ...

  • Heat Controller DMH18DB-1 - page 21

    Ser vice Manual 21 Flaring Work and Connection of Piping 1. Route the indoor tubing and the drain hose to the required piping hole position. 2. Inser t the piping, drain hose, and the connecting cable into the piping hole . 3. Inser t the connecting cable into the indoor unit. • Don't connect the cable to the indoor unit. • Make a small lo ...

  • Heat Controller DMH18DB-1 - page 22

    22 Multi type Air Conditioner Wrap the insulation material around the connecting portion. 1. Ov erlap the connection pipe heat insulation and the indoor unit pipe heat insulation material. Bind them together with vinyl tape so that there ma y be no gap. 2. Wrap the area which accommodates the rear piping housing section with vinyl tape . 3. Bundle ...

  • Heat Controller DMH18DB-1 - page 23

    Ser vice 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. • Slide it back into position. REMO T ...

  • Heat Controller DMH18DB-1 - page 24

    24 Multi type Air Conditioner Outdoor Align the center of the pipings and sufficiently tighten the flare nut b y hand. Finally , tighten the flare nut with torque wrench until the wrench clicks . • When tightening the flare nut with torque wrench, ensure the direction f or tightening f ollows the arro w on the wrench. Liquid side piping T orque w ...

  • Heat Controller DMH18DB-1 - page 25

    Ser vice Manual 25 Flaring Work and Connection of Piping Connect the cable to the indoor unit b y connecting the wires to the terminals on the control boar d individu- ally accor ding to the outdoor unit connection. (Ensure that the color of the wires of the outdoor unit and the ter- minal No . are the same as those of the indoor unit.) The earth w ...

  • Heat Controller DMH18DB-1 - page 26

    26 Multi type Air Conditioner Connecting the Cable betw een Indoor Unit and Outdoor Unit Connect the cable to the Outdoor unit. 1. Remov e the cover control from the unit b y loosening the screw . Connect the wires to the ter minals on the control board individually as the f ollowing. 2. Secure the cable into the control board with the str ain reli ...

  • Heat Controller DMH18DB-1 - page 27

    Ser vice Manual 27 Connecting the Cable betw een Indoor Unit and Outdoor Unit (1) Remov e two-caps on the conduit panel. (f or low v oltage line) (2) Pull out connection cable through conduit. (3) After conduit to the panel, fix nut to the opposite side of panel (4) P ass the conneciton cable through the hole (5) Properly connect the cable on the t ...

  • Heat Controller DMH18DB-1 - page 28

    28 Multi type Air Conditioner Connecting the Cable betw een Indoor Unit and Outdoor Unit Connect the cable to the indoor unit CA UTION! Pro vide a cir cuit breaker between the power sour ce and the outdoor unit as shown belo w . Size breaker per the Maximum Fuse or Circuit Breaker (MOC) rating on the unit rating plate. Air Conditioner Circuit Break ...

  • Heat Controller DMH18DB-1 - page 29

    Ser vice Manual 29 Checking the Dr ainage, F or ming the Pipings and Long Pipe Setting Chec king the drainage T o check the draina ge . 1. P our a glass of water on the e v aporator . 2. Ensure the water flo ws through the drain hose of the indoor unit without any leakage and goes out the drain e xit. Drain piping 1. The drain hose should point do ...

  • Heat Controller DMH18DB-1 - page 30

    30 Multi type Air Conditioner Checking the Dr ainage, F or ming the Pipings and Long Pipe Setting Forming the piping Form the piping by wrapping the con- necting portion of the indoor unit with insulation material and secure it with two kinds of vin yl tape . • If y ou want to connect an additional drain hose , the end of the drain outlet should ...

  • Heat Controller DMH18DB-1 - page 31

    Ser vice Manual 31 Air Purging and Ev acuation Air Pur ging and Ev acuation Air and moisture remaining in the refrigerant system hav e undesirable eff ects 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 ma y freeze and b lock capillary ...

  • Heat Controller DMH18DB-1 - page 32

    32 Multi type Air Conditioner Checking the Dr ainage, F or ming the Pipings and Long Pipe Setting 1. Connect the charge hose end described in the pre- ceding steps to the v acuum pump to e vacuate the tubing and indoor unit. Confir m the "Lo" knob of the manif old valv e is open. Then, run the vacuum pump . The operation time f or ev acua ...

  • Heat Controller DMH18DB-1 - page 33

    Ser vice Manual 33 Charging ■ Each outdoor unit is f actor y charged (nameplate charge) f or the e v aporator as well as a 7.5m(25ft) line set f or each indoor line. Any time total line set is used either shor ter or longer then the nominal 15m(50ft) line set length the refrigerant charge has to be adjusted. ■ Whether the line set is made shor ...

  • Heat Controller DMH18DB-1 - page 34

    34 Multi type Air Conditioner T est Running T est Running 1. Check that all tubing and wiring ha ve been properly connected. 2. Check that the gas and liquid side service valv es are fully open. Prepare remote control Remov e the batter y cover b y pulling it according to the arrow direction. Inser t new batteries making sure that the (+) and ( – ...

  • Heat Controller DMH18DB-1 - page 35

    Ser vice Manual 35 Operation 1. MAIN UNIT FUNCTION • DISPLA Y 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 cancel or appliance operation pause Tim ...

  • Heat Controller DMH18DB-1 - page 36

    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 in defrost control, the i ...

  • Heat Controller DMH18DB-1 - page 37

    Ser vice 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, the compressor is turned on. Compressor ON Temp ➲ ...

  • Heat Controller DMH18DB-1 - page 38

    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 to the set time. ■ Sleep Timer Operation ? ...

  • Heat Controller DMH18DB-1 - page 39

    Ser vice 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 switch is on the forced operation position, or ...

  • Heat Controller DMH18DB-1 - page 40

    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 Mode Outdoor unit operation : Lights up during De ...

  • Heat Controller DMH18DB-1 - page 41

    Ser vice 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 constant superheat or subcooling. • Outdoor ...

  • Heat Controller DMH18DB-1 - page 42

    42 Multi type Air Conditioner Operation Remote Contr ol Operation ON OFF CANCEL AUT O 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 18 15 6 4 2 7 11 8 13 14 Operation Mode The Remote Cont ...

  • Heat Controller DMH18DB-1 - page 43

    Ser vice Manual 43 Disassembly Disassembl y Indoor Unit Split T ype 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 securin ...

  • Heat Controller DMH18DB-1 - page 44

    44 Multi type Air Conditioner Disassembly 2. T o remove the Contr ol Bo x. • Remove securing screws. • Pull the control box out from the chassis carefully. 3. T o remove the Dischar ge Grille . • Unhook the discharge grille and pull the discharge grille out from the chassis carefully. 4. T o remove the Evaporator . • Remove 3 screws securin ...

  • Heat Controller DMH18DB-1 - page 45

    Ser vice Manual 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. T o remove the Motor Co ver • Remove 2 securing screw. • Pull the motor cover out from the chassis carefully. 6. T o remove the Cr oss-Flow F an • Loosen the scre ...

  • Heat Controller DMH18DB-1 - page 46

    46 Multi type Air Conditioner Schematic Diagram Schematic Dia gram Electr onic Contr ol Device 1. Indoor Unit 1) Split T ype ...

  • Heat Controller DMH18DB-1 - page 47

    Ser vice Manual 47 Schematic Diagram 2. Outdoor Unit P07 SW01F OR2H,OR7H,OR10H:91K,OR3H-4H,OR8H-9H,OR11H-12H:15K(ETC:20K) R03T 1 1 DC 5V 56K R04T 1K 1 2 7036P IC01A CN-JIG 3 4 3 4 2 2 JIG_RX JIG_TX DC 5V 10K R01T 1K R02T C01H-C04H : 103 P21 21 JIG_RX 26 OSC01B CST-8.00MGW JIG_TX + 3 C02A 10 R03A,100 50V 25V 0.01 C01A R02A,4.7K R01A,1K Xin Vss Xout ...

  • Heat Controller DMH18DB-1 - page 48

    48 Multi type Air Conditioner Schematic Diagram 23.2K 8.06K 8.06K 23.2K 23.2K 8.06K 1% 1% 51.1K 102 100V C25M 1% 9.1k R27M 100uf C24M + 2 5 4 6 100uF 25V C26M R28M 13K 1% 1 5 + R29M,2K,1% 4 22 51.1K 10K 1 2.94K 6 7 4.7K PWM(C) 35.7K 4.3K R26M 10.2K 3 2 1 21.5K 6.04K KRA101M Q07M DC5V 7 3K 5.23K 39.2K 13K 20 20 9 8 R04S 20K 14 51.1K 102 C14M 100V ...

  • Heat Controller DMH18DB-1 - page 49

    Ser vice Manual 49 1. Room T ype Indoor Unit Wiring Diagram Schematic Diagram 2. Outdoor Unit ...

  • Heat Controller DMH18DB-1 - page 50

    50 Multi type Air Conditioner Schematic Diagram 1. Indoor Unit MAIN P .C.B ASM 1) Split T ype Components Locations • T OP VIEW • BO TT OM VIEW PCB :6870A90409B ASSY :6871A20771 6871A20782 ...

  • Heat Controller DMH18DB-1 - page 51

    Ser vice Manual 51 Schematic Diagram 2. Display ASSEMBL Y 1) Split T ype (6871A20682A) ...

  • Heat Controller DMH18DB-1 - page 52

    52 Multi type Air Conditioner Schematic Diagram 3. Outdoor Unit 1) Component side ...

  • Heat Controller DMH18DB-1 - page 53

    Ser vice Manual 53 Schematic Diagram 2) Solder side ...

  • Heat Controller DMH18DB-1 - page 54

    54 Multi type Air Conditioner T roubleshooting Guide T r oubleshooting Guide Refrigeration Cycle Dia gram Refrigerent Flow Cooling Heating C/V1 C/V2 High Pressure S/W A c c 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 PCB Connector Th1 Thermistor for evaporat ...

  • Heat Controller DMH18DB-1 - page 55

    Ser vice Manual 55 T roubleshooting 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 troubles occur simultaneously, primarily ...

  • Heat Controller DMH18DB-1 - page 56

    56 Multi type Air Conditioner T roubleshooting Guide T r ouble anal ysis 1. Check temperature difference between intake and discharge air, and operating current. All amount of refrigerant leaked out. Check refrigeration cycle. Refrigerant leakage Clog of refrigeration cycle Defective compressor Excessive amount of refrigerant Normal Notice: Tempera ...

  • Heat Controller DMH18DB-1 - page 57

    Ser vice Manual 57 T roubleshooting Guide Electr onic P ar ts T r oubleshooting Guide ❇ Refer to electronic contorol device drawing & schematic diagram. The Pr oduct 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" sound is made from the indoor ...

  • Heat Controller DMH18DB-1 - page 58

    58 Multi type Air Conditioner T roubleshooting 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 not controlled by the remote controller. (When op ...

  • Heat Controller DMH18DB-1 - page 59

    Ser vice Manual 59 T roubleshooting 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 Indoor temperature is attatched as close as to be ef ...

  • Heat Controller DMH18DB-1 - page 60

    60 Multi type Air Conditioner T roubleshooting Guide When indoor F an does not operate . Check connecting condition of the CN-MOTOR CON- NECTOR Does the voltage of terminal of CN-DC/DC CONNECTOR in Indoor unit corresponds to the values in the table of page 56 Do the voltage of terminal of CN-DC/DC CONNECTOR in Outdoor unit corresponds to the values ...

  • Heat Controller DMH18DB-1 - page 61

    Ser vice Manual 61 T roubleshooting Guide When the louver does not operate . T r ouble 5 When V er tical 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 ...

  • Heat Controller DMH18DB-1 - page 62

    62 Multi type Air Conditioner T roubleshooting Guide Err or 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 • Soldered poorly • Internal circu ...

  • Heat Controller DMH18DB-1 - page 63

    Ser vice Manual 63 T roubleshooting 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. • The GND 1,2 is not connected at ...

  • Heat Controller DMH18DB-1 - page 64

    64 Multi type Air Conditioner T roubleshooting Guide Error Title Cause of error Check point & Normal condition code 33 D-Pipe Temp. High • Discharge sensor temp. high • Check the discharge pipe sensor. • Check the install condition for over load. • Check the leakage of refrigerent. • Check the SVC V/V open. Error Title Cause of error ...

  • Heat Controller DMH18DB-1 - page 65

    Ser vice Manual 65 T roubleshooting 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 • Soldered poorly • Internal ...

  • Heat Controller DMH18DB-1 - page 66

    66 Multi type Air Conditioner 2-wa y , 3-wa y V alv e 2-wa y , 3-wa y V alve 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-clockwise) (clockwise) (push-pin or with vacuum ...

  • Heat Controller DMH18DB-1 - page 67

    Ser vice Manual 67 2-wa y , 3-wa y V alv e • Be sure to short pressure S/W. otherwise Low pressure S/W detect low pressure skete and stops the compressor. (1) Pumping down • Pr ocedure 1. Confirm that both the gas side and liquid side valves are set to the open position. - Remove the valve stem caps and confirm that the valve stems are in the r ...

  • Heat Controller DMH18DB-1 - page 68

    68 Multi type Air Conditioner 2-wa y , 3-wa y V alv e (2) Ev acuation (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 port of the gas side valve to the low side of ...

  • Heat Controller DMH18DB-1 - page 69

    Ser vice Manual 69 2-wa y , 3-wa y V alv e (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 the bottom of the cylinder. - If you are using a gas cylinder, also use a scale and reverse the cylinder so that the syste ...

  • Heat Controller DMH18DB-1 - page 70

    Specifications and performance data subject to change without notice. HEA T CONTROLLER, INC. 1900 WELL WOR TH A VENUE • J A CKSON, MICHIGAN 49203 THE QU ALITY LEADER IN CONDITIONING AIR 05/15/07 ...

Manufacturer Heat Controller Category Air Conditioner

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5. FAQ - Frequently Asked Questions
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