Instruction/ maintenance manual of the product DMC24CA-1 Heat Controller
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Ceiling Cassette Type Single-Zone Air Conditioning DMC24CA-1 DMC36CA-1 Befor e servicing the unit, r ead the “safety pr ecautions” in this manual. Only for authorized service personnel.
2 Ceiling Cassette Air Conditioner T ABLE OF CONTENTS T able of contents P age 1. Saf ety Precautions .......................................................................................................... .3 2. F eature & Benefits ............
Ser vice Manual 3 Safety Precautions T o pre v ent injur y to the user or other people and proper ty damage, the f ollo wing 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 .
4 Ceiling Cassette Air Conditioner ■ Operational 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.
Ser vice Manual 5 ■ Installation Do not open the inlet grill of the product during operation. (Do not touch the electr ostatic filter , if the unit is so equipped.) • There is risk of physical injury, electric shock, or prod- uct failure. Be cautious that water could not enter the product.
6 Ceiling Cassette Air Conditioner Keep le vel even when installing the product. • To avoid vibration or water leakage. Use two or more people to lift and transport the product. • Avoid personal injury. Use a soft cloth to c lean. Do not use harsh detergents, solvents, etc.
Ser vice Manual 7 F eatures & Benefits En vironment Friendl y Refrig erant : - LG Ceiling Cassette Air Conditioners uses environ- ment friendly refrigerant, which don't do any harm to the environment.
8 Ceiling Cassette Air Conditioner Swirl Swing - It is the function for comfort cooling/heating operation. - The diagonal two louvers are opened the more larger than the other louvers. After one minute, it is opposite. Space Contr ol Vanes angle can be controlled by pair, considering its installation environment.
Ser vice Manual 9 F eatures & Benefits High Ceiling Operation - According to the height of ceiling installation, it pro- vides variability of indoor fan motor rpm. If the height of installation is low then you can adjust low rpm of indoor fan motor.
10 Ceiling Cassette Air Conditioner List of Functions • Ceiling Cassette List of Functions Air supply outlet Airflow direction control (left & right) Airflow direction control (up & down) Au.
Ser vice Manual 11 Function of Remote Control 1. Wireless LCD Remote Contr ol Function of Remote Contr ol Cooling Operation Auto Operation Healthy Dehumidification Operation Operation Mode ON OFF CANCEL SET ° C/ ° F AUT O CLEAN 1 3 5 4 9 10 12 18 16 7 2 8 13 15 11 6 Flip-up door (opened) Signal transmitter 17 14 1.
12 Ceiling Cassette Air Conditioner Function of Remote Control Timer Cancel 2ndF Program Week Hour Min Holiday Set/Clr RESET Plasma Operation unit Humidify AUT O SWING OPERA TION F AN SPEED Program set SUB FUNCTION SET TEMP Room T emp HI MED LO Heater Defrost Filter Preheat Out door Time Timer On Set no.
Ser vice Manual 13 Specifications Specifications Note : 1. Capacities are based on the following conditions: Cooling: - Indoor Temperature 26.7 ° C(80 ° F) DB /19.4 ° C(67 ° F) WB - Outdoor Temperature 35 ° C(95 ° F) DB /23.9 ° C(75 ° F) WB Piping Length - Interconnecting Piping Length 7.
14 Ceiling Cassette Air Conditioner Specifications Rated Capacity Cooling kW Btu/h Heating kW Btu/h Rated Input Cooling kW Heating kW Energy Label Testing combination Running current Cooling A Heating A Starting current (Cooling/Heating) A Power supply Phase / Volts / Hz Power supply Cable(outdoor) No.
Ser vice Manual 15 225(8.9) 950(37.4) 950(37.4) 840(33.1) 7 76(3.0) 135(5.3) 4 5 225(8.9) 6 806(31.7) 840(33.1) 840(33.1) 688(27.1) 950(37.4) 30(1.18) 950(37.4) R35(1.4) 3 2 1 900(35.4) (ceiling opening) 688(27.1) (hanging bolt) 840(33.1) 900(35.4) (ceiling opening) 950(37.
16 Ceiling Cassette Air Conditioner 870(34.3) 546(21.5) 54.6(2.1) 333(13.1) Ø 531(20.9) 10(0.4) 808(31.8) 782.5(30.8) 392(15.4) 25.5(1.0) 80(3.1) 50(2.0) 320(12.6) 320(12.6) 340(13.4) 360(14.2) 160(6.3) *mm(inch) Dimensional Dra wings Model No.: DMC24CA-1 2.
Ser vice Manual 17 Dimensional Dra wings Model No.: DMC36CA-1 Gas pipe connection P ar t Name Air discharge grille Liquid pipe connection Ear th screw P ower & transmission connection 5 No . 2 4 3 1 Remark 5 1135(44.7) 1165(45.9) 308(12.1) 565(22.
18 Ceiling Cassette Air Conditioner Wiring Diagrams 1. Indoor Unit DMC24CA-1 / DMC36CA-1 Wiring Diagrams Connector Number Location CN-POWER AC power supply CN-MOTOR BLDC fan motor output CN-DPUMP Drai.
Ser vice Manual 19 Wiring Diagrams DMC24CA-1 DMC36CA-1 2. Outdoor Unit Notes: BL RD YL BLUE RED YELLOW BK OR GN/YL BLACK ORANGE GREEN/YELLOW BR WH BRO WN WHITE FIELD WIRING Notes: BL RD YL BLUE RED YE.
20 Ceiling Cassette Air Conditioner Refrigerant Cycle Diagrams 1. Cooling Only Models INDOOR UNIT H/EX LIQUID SIDE Gas Side GAS SIDE Capillary T ube OUTDOOR UNIT Thermistor (Air) E.
Ser vice Manual 21 Installation More than 30cm(11.8inch) Fence or obstacles Sunr oof Fence or obstacles Sunroof More than 50cm(19.7inch) (Service space) More than 30cm(11.8inch) More than 50cm(19.7inch) More than 70cm(27.6inch) More than 50cm(19.7inch) More than 100cm(39.
22 Ceiling Cassette Air Conditioner Installation Bolt Tubing connection 2. Settlement of outdoor unit • Anchor the outdoor unit with a bolt and nut( ø 10mm(0.
Ser vice Manual 23 Installation 4. Wiring Connection Make sure that the screws of the terminal are free from looseness. WARNING 1. All wiring must comply with local and national electrical codes. 2. Select a power source that is capable of supplying the current as required by the air conditioner.
24 Ceiling Cassette Air Conditioner Installation 5. Installation of Decoration P anel 1. Temporarily fix two decoration panel fixing screws (hexagon M5 screw) on the unit body. (Tighten by amount 10mm(0.39inch) in length.) The fixing screws (hexagon M5 screw) are included the indoor unit box.
Ser vice Manual 25 Installation 6. Heat Insulation and pipings 1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 120 ° C(248 ° F) ).
26 Ceiling Cassette Air Conditioner Installation 7. Drain Pipe W ork ■ Drain Piping of Ceiling Cassette • Drain piping must have down-slope (1/50 to 1/100): be sure not to provide up-and-down slope to prevent reversal flow. • During drain piping connection, be careful not to exert extra force on the drain port on the indoor unit.
Ser vice Manual 27 Installation 1) PRECA UTIONS IN TEST RUN • The initial power supply must provide at least 90% of the rated voltage. Otherwise, the air conditioner should not be operated. For test run, carry out the cooling operation first even during winter season.
28 Ceiling Cassette Air Conditioner Installation Thermometer 2) Connection of power suppl y 1. Connect the power supply cord to the independent power supply. • Circuit breaker is required. 2. Operate the unit for fifteen minutes or more. 3) Evaluation of the perf ormance 1.
Ser vice Manual 29 Installation 9. Optional Operation 1) T w o Thermistor System (1) Open the rear cover of the wired remote-controller to set the mode.
30 Ceiling Cassette Air Conditioner Installation 2) Adjusting air v olume to the height of ceiling You can choose the RPM(or air volume) of indoor motor according to the height of ceiling to supply the com- fortable atmosphere to consumers. Procedure 1.
Ser vice Manual 31 T roub leshooting Guide T rouble anal ysis 1. Check temperature difference between intake and discharge air, and operating current. All amount of refrigerant leaked out.
32 Ceiling Cassette Air Conditioner T roub leshooting Guide Electr onic P ar ts T r oubleshooting Guide 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 the Operating LED of indoor unit blink When Operation's ON? Refer to the self-diagnosis function.
Ser vice Manual 33 T roub leshooting 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.
34 Ceiling Cassette Air Conditioner T roub leshooting Guide When cooling does not operate T r ouble 3 Turn on Main Power Operate "Cooling Mode( )" by setting the desired temperature of the remote controller to at least 1 ° C (1.8ºF) below room temperature .
Ser vice Manual 35 T roub leshooting Guide When indoor F an does not operate T r ouble 4 Check the SSR high speed operation by remote control. (The Indoor Fan Motor is connected) Turn off Main power C.
36 Ceiling Cassette Air Conditioner T roub leshooting Guide • Confirm that the Vertical Louver is normally geared with the shaft of Stepping Motor. • If the regular torque is detected when rotatin.
Ser vice Manual 37 T roub leshooting 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.
38 Ceiling Cassette Air Conditioner T roub leshooting Guide Ω 10k Ω Check the resistance Check the voltage V 2.5Vdc 01 02 06 Indoor air sensor Indoor inlet pipe sensor Indoor outlet pipe sensor .
Ser vice Manual 39 T roub leshooting Guide T roub leshooting CH03 Check the Volt. Indoor Unit V 12Vdc 12V S GND Check the Volt. Wired R/C V 12Vdc 12V S GND 03 Communication Wired R/C • Open / Short • Wrong connection • Connection of wire • Main PCB Volt.
40 Ceiling Cassette Air Conditioner T roub leshooting Guide T roub leshooting CH04 Check the resistance Ω 0 Ω CN Float 04 Drain pump / Float switch • Float switch Open. (Normal : short) • The connection of wire(Drain pump/ Float switch) • Drain pump power input.
Ser vice Manual 41 T roub leshooting Guide T roub leshooting CH05, CH53 05 / 53 Communication (Indoor → Outdoor) • Communication poorly • Power input AC 220V. (Outdoor, Indoor) • The connector for transmission is disconnected. • The connecting wires are misconnected.
42 Ceiling Cassette Air Conditioner T roub leshooting Guide T roub leshooting CH24, CH25 24 25 Press S/W Open Input voltage • Low / High press S/W open. • Abnormal Input voltage (140Vac , 300Vac . • Check the connection of “ CN_Press ” . • Check the components.
Ser vice Manual 43 T roub leshooting Guide T roub leshooting CH32, CH33 32 33 D-pipe (Inverter) temp. high (105 ° C(221 ° F) ) D-pipe (Constant) temp. high (105 ° C(221 ° F) ) • Discharge sensor (Inverter) temp. high • Discharge sensor (Cons.) temp.
44 Ceiling Cassette Air Conditioner T roub leshooting Guide T roub leshooting CH41, CH44, CH45, CH46, CH47, CH65 Ω 41 44 45 46 47 65 D-pipe sensor (Inverter) Air sensor Condenser Pipe sensor Suction.
Ser vice Manual 45 T roub leshooting Guide T roub leshooting CH51, CH60 51 60 Capacity Error EEPROM Check sum • Over Capacity Combination • Undder Capacity Combination • Check sum error • Check the indoor unit capacity. • Check the combination table.
46 Ceiling Cassette Air Conditioner T roub leshooting Guide T roub leshooting CH61, CH62 61 62 Condenser pipe sensor temp. high Heat sink sensor temp. high • Condenser pipe sensor detected high temp.(65 ° C)(149 ° F) • Heat sink sensor detected high temp.
Ser vice Manual 47 (3-wa y) V alv e (3-wa y) V alve 3-way Valve (Liguid Side) 3-way Valve (Gas Side) Works Shaft position Shaft position Service port Shipping Closed Closed Closed (with valve cap) (wi.
48 Ceiling Cassette Air Conditioner (3-wa y) V alv e • Pr ocedure For pumping down,firstly short the Low Pressure s/w at the outside and then operate below proce- dure. 1. Confirm that both the gas side and liquid side valves are set to the open position.
Ser vice Manual 49 (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.
50 Ceiling Cassette Air Conditioner (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.
Ser vice Manual 51 Electronic Control De vice Electr onic Contr ol Device • Main P .C.B ASM <Indoor> <Outdoor>.
Specifications and performance data subject to change without notice. 03/19/07.
An important point after buying a device Heat Controller DMC24CA-1 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Heat Controller DMC24CA-1 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Heat Controller DMC24CA-1 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Heat Controller DMC24CA-1 you will learn all the available features of the product, as well as information on its operation. The information that you get Heat Controller DMC24CA-1 will certainly help you make a decision on the purchase.
If you already are a holder of Heat Controller DMC24CA-1, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Heat Controller DMC24CA-1.
However, one of the most important roles played by the user manual is to help in solving problems with Heat Controller DMC24CA-1. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Heat Controller DMC24CA-1 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
