Heat Controller DMC24CA-1 manual

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 .......................................................................................................... .7 3[...]

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 . ■ Meanings of symbols used in this manual are as[...]

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. Be especially careful of the case edges and the fins on the con- dense[...]

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. • There is risk of fire, electric shock, or product d[...]

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. • There is risk of fire, electric shock, or damage to the plastic par[...]

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. Plasma Air Purifier : - It removes not only microscopic contaminants & dust, but also house mites, pollen, and pet fur to help preventin[...]

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. - For example direct drafts can be [...]

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. On the other hand if the height of the installation is high you can adjust high rpm of indoor fa[...]

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) Auto swing (left & right) Air flow Auto swing (up & down) Airflow steps(Fan / Cool / Heat) CHAOS swing CHAOS wind (Auto wind) Jet cool (Power wi[...]

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. START/STOP BUTTON Operation sta[...]

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. Time Off 01 03 05 07 09 11 13 15 17 19 21 23[...]

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 7.5m(25ft) - Level Difference of Zero. Conversion Formu[...]

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. * mm 2 (No. AWG) Power and transmission cable [...]

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(37.4) 806(31.7) (hanging bolt) 840(33.1) Drain pipe connection Air suction gril[...]

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. Outdoor Units[...]

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(22.2) 273(10.7) 520(20.5) 80(3.1) 124(4.9) 900(35.4) 550(21.7) 370(14.6) 395(15.6) 15(0.6) 175(6.9) 3 [...]

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 Drain pump output CN-DISP Display CN-FLOAT Float switch input CN-REMO Remote control CN-CC Dry-contact CN-ROOM Room sensor CN-PIPE1 In-pipe thermistor CN-[...]

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 YELLOW BK OR GN/YL BLACK ORANGE GREEN/YELLOW BR WH BRO WN WHITE FIELD WIRING[...]

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.E.V . Accumulator Heat Exchanger Check V alve Constant Compressor 1 Constant Compressor 2 Check V alve Thermistor Thermistor High pressure S/W Thermistor 24k 34k Gas Liq[...]

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(39.4inch) More than 50cm(19.7inch) More than 50cm(19.7inch) 1.2 Outdoor Unit • [...]

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(0.39inch)) tightly and horizontally on a concrete or rigid mount. • When installing on the wall, roof or rooftop, anchor the mounting base securely with a nail or wire assum- ing the influe[...]

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. 3. Feed the power source to the unit via a distribut[...]

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. 2. Remove the air inlet grille from the decoration panel[...]

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) ). 2. Precautions in high humidity circumstance: This air conditioner has been tested according to the "KS Standard Conditions with Mist" and con here[...]

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. • The outs[...]

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. Carry out the test run more than 5 minutes without stopping. (Test run will be [...]

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. Measure the temperature of the intake and dis- charge air. 2. Ensure the [...]

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. (2) Select one of three selectable modes as follows. • Position 1: The room themperature is controlled by the thermistor of the wired remote-controller, control the temperature according to the p[...]

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. Choose the selectable position in the table after measuring the height of ceiling. 2. In the cas[...]

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. Check refrigeration cycle. Refrigerant leakage Clog of refrigeration cycle Defective compressor Excessive amount of refrigerant Normal Notice: Temperature differ[...]

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. Is [...]

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. At this point the wind speed is not controlled by the remote controller. (When operated in [...]

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 . When in Air Circulation Mode, Compressor/Outdoor Fan is stopped. Check the senso[...]

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 Check the connection of CN-FAN or CN-MOTOR Check the Fan Motor Check the Fuse(AC250V/T2A) Turn ON Main Power Check the related circuit of indoor Fan Mo[...]

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 rotating the Vertical Louver with hands Normal • Check the connecting condition of CN-U/D Connector • Check the soldering condition(on PWB) of CN-U/D Con[...]

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. • If more than two troubles occur simultaneously, primaril[...]

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 • Open / Short • Soldered poorly • Internal circuit error • Open / Short • Soldered poorly • Internal circuit error • Open / Short • Sol[...]

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. DC12V • Noise interference Display code Title Cause of error Check point & Normal[...]

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. (220V) • Drain tube installation. • Indoor unit installation. (Inclinatio[...]

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. • The GND1,2 is not connected at main GND. • The communication line [...]

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. • Check the power source. • Check the components. Display code Title Cau[...]

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. high • Check the discharge pipe sensor for INV. • Check the install condition for over l[...]

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 Pipe sensor D-pipe sensor (Constant) Heat sink sensor • Open / Short • Soldered poorly • Internal circuit error • Open / Short • Soldered p[...]

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. • Check the PCB ASM P/No. • Check the poor soldering. Display code Title Cause of err[...]

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.(85 ° C)(185 ° F) • Check the load condition. • Check the sensor of Condenser pipe [...]

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) (with valve cap) (with cap) Air purging Open Closed Open (Installation) (counter-clockwise) (clockwise) (push-pin or with vacuum pump) Operation Open Ope[...]

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. - Remove the valve stem caps and confirm that the valve stems are in the raised 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. 3. Connect the service port of the gas side valve to the low side of the gauge. 4. Eva[...]

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. - If you are using a gas cylinder, also use a scale and reverse the cylinder so that[...]

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[...]