Page 2 - Air Conditioner Service Manual; TABLE OF CONTENTS
Air Conditioner Service Manual TABLE OF CONTENTS Safety Precautions ...........................................................................................................................1 Dimensions ...................................................................................................
Page 3 - Safety Precautions; This symbol indicates the possibility of death or serious injury.; Be sure to follow the instruction.; Do not modify or extend the power cord.; Installation
1 Room Air Conditioner Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage, the following instructions mustbe followed. ■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness isclassified by the following indic...
Page 5 - Operation; Use a dedicated outlet for this appliance.
3 Room Air Conditioner Safety Precautions ■ Operation Do not turn the air-conditioner ON or OFF byplugging or unplugging the power plug. Use a dedicated outlet for this appliance. • There is risk of fire or electrical shock. • There is risk of fire or electrical shock. Grasp the plug to remove the c...
Page 6 - Service Manual 4; Keep level even when installing the product.
Service Manual 4 Always check for gas (refrigerant) leakage afterinstallation or repair of product. Install the drain hose to ensure that water isdrained away properly. • Low refrigerant levels may cause failure of product. • A bad connection may cause water leakage. Keep level even when installing ...
Page 7 - Room Air Conditioner
5 Room Air Conditioner Use a soft cloth to clean. Do not use harshdetergents, solvents, etc. Do not touch the metal parts of the productwhen removing the air filter. They are verysharp! • There is risk of fire, electric shock, or damage to the plastic parts of the product. • There is risk of persona...
Page 8 - Dimensions; Indoor Unit; This symbol alerts you to the risk of electric shock.; NOTICE; Symbols Used in this Manual
Service Manual 6 Dimensions Dimensions D H W Installation plate W mm 907 H mm 2 85 D mm 231 Model Dimension 18k Btu Series Indoor Unit This symbol alerts you to the risk of electric shock. This symbol alerts you to hazards that could cause harm to theair conditioner. This symbol indicates special no...
Page 9 - Room Air Conditioner; Outdoor Unit
7 Room Air Conditioner W L2 L3 1L D H L 5 Gas side (3-way valve) Liquid side (2-way valve) MODEL DIM unit W mm 8 45 H mm 6 80 D mm 304 L1 mm 378 L2 mm 68 L3 mm 53 0 L4 mm 14 L5 mm 100 Dimensions Outdoor Unit 18k Btu Series
Page 10 - Product Specifications
Service Manual 8 Product Specifications Product Specifications Table-1 Model Name Item Unit W MIN kcal/h.(W) Btu/h. W Cooling Capacity Type kcal/h.(W) Btu/h. W Max kcal/h.(W) Btu/h. W MIN kcal/h.(W) Btu/h. W Heating Capacity Type kcal/h.(W) Btu/h. W Max kcal/h.(W) Btu/h. IN:20°C,Out: -10°C(Heater ON...
Page 11 - Room Air Conditioner; Indoor unit; Maximam l; Piping Length and Elevation; Selection of the Best Location
9 Room Air Conditioner Installation Installation Indoor unit • Do not have any heat or steam near the unit.• Select a place where there are no obstacles in front of the unit. • Make sure that condensation drainage can be conveniently routed away. Do not install near a doorway. • Ensure that the spac...
Page 12 - Mount the installation plate on the wall with four; Measure the wall and mark the centerline. It is; How to Fix Installation Plate
Service Manual 10 Installation The wall you select should be strong and solidenough to prevent vibration 1. Mount the installation plate on the wall with four type A screws. If mounting the unit on a concretewall, use anchor bolts. • Mount the installation plate horizontally by aligning the centerli...
Page 13 - Flaring work and connection of piping; Flaring work
11 Room Air Conditioner Flaring work and connection of piping Flaring work and connection of piping Flaring work Flaring work Main cause for refrigerant leakage is due to defect in theflaring work. Carry out correct flaring work using the follow-ing procedure. Cut the pipes and the cable.• Use the p...
Page 14 - Indoor unit installation; For right rear piping
Service Manual 12 Flaring work and connection of piping Route the indoor tubing and the drain hose in the direction ofrear right. Drain hose Connecting cable Vinyl tape(narrow) Connectionpipe Connecting cable Vinyl tape(wide) Wrap with vinyl tape Indoor unit pipe Pipe Plastic bands Insulation materi...
Page 15 - Insert the connecting cable into the indoor unit.; For left rear piping
13 Room Air Conditioner Flaring work and connection of piping • Bundle the piping and drain hose together by wrapping them with vinyl tape for enough to cover where they fit intothe rear piping housing section. Connecting the pipings to the indoor unit andthe drain hose to drain pipe. • Align the ce...
Page 16 - Installation Information (For left piping)
Service Manual 14 Flaring work and connection of piping • Wrap the area which accommodates the rear piping hous- ing section with vinyl tape. Indoor unit installation • Remove the spacer. • Ensure that the hooks are properly seated on the installa- tion plate by moving it left and right. Press the l...
Page 17 - 5 Room Air Conditioner; Connection of the pipes-Outdoor; Align the center of the pipings and sufficiently
15 Room Air Conditioner Connection of the pipes-Outdoor Flaring work and connection of piping Align the center of the pipings and sufficiently tighten the flare nut by hand. Finally, tighten the flare nut with torque wrench until the wrench clicks. • When tightening the flare nut with torque wrench,...
Page 18 - Service Manual 16; Connect the cable to the Indoor unit.; Connecting the cable between indoor unit and outdoor unit; • The above circuit diagram is subject to change without notice.
Service Manual 16 Connect the cable to the Indoor unit. Connecting the cable between indoor unit and outdoor unit Connecting the cable between indoor unit and outdoor unit Connect the cable to the indoor unit by connecting the wires to the terminals on the control board individuallyaccording to the ...
Page 19 - Connect the cable to the outdoor unit
17 Room Air Conditioner Connecting the cable between indoor unit and outdoor unit Remove the control cover from the unit by loosening the screw.Connect the wires to the terminals on the con- trol board individually. Secure the cable onto the control board with the cord clamp. Refix the control cover...
Page 20 - Checking the drainage and forming the pipings; Checking the drainage; To remove the front panel from the indoor unit.
Service Manual 18 Checking the drainage and forming the pipings Checking the drainage and forming the pipings Checking the drainage Form the piping To remove the front panel from the indoor unit. • Set the air direction louvers up-and-down to the position(horizontally) by hand. • Remove the securing...
Page 21 - Preparation; Air Purging; Air purging
19 Room Air Conditioner Air purging Air and moisture remaining in the refrigerant system haveundesirable effects as indicated below. • Pressure in the system rises. • Operating current rises. • Cooling(or heating) efficiency drops. • Moisture in the refrigerant circuit may freeze and block cap- illa...
Page 22 - Evacuation
Service Manual 20 Air purging Evacuation • Connect the charge hose end described in the preceding steps to the vacuum pump to evacuate the tubing andindoor unit.Confirm the "Lo" knob of the manifold valve is open. Then,run the vacuum pump.The operation time for evacuation varies with tubing ...
Page 23 - Test Running; Settlement of outdoor unit; Evaluation of the performance; Pump Down Procedure
21 Room Air Conditioner Test running Test Running 1. Check that all tubing and wiring have been properly con- nected. 2. Check that the gas and liquid side service valves are fully open. Settlement of outdoor unit • Anchor the outdoor unit with a bolt and nut(ø10mm) tightly and horizontally on a con...
Page 24 - Service Manual; Functions
Service Manual 2 2 Functions • Maintain the room temperature in accordance with the Setting Temp. • Restarting is for approx. 3 minutes. • Super High, High, Med, Low Indoor Unit Operation ON/OFF by Remote controller Sensing the Room Temperature Room temperature control Time Delay Safety Control Indo...
Page 26 - Function of Controls; • DISPLAY; Protection of the evaporator pipe from frosting
Room Air Conditioner 24 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/...
Page 27 - Cooling mode operation
25 Service Manual Operation Cooling mode operation • Operating frequency of compressor depend on the difference of the temperature. (= intake air Temp.- Compressor off Temp. • Compressor off temp.= setting temp. -0.5°C on temp. = setting temp. +0.5°C • Condition of compressor turned off - When intak...
Page 28 - Heating mode operation
Room Air Conditioner 26 Operation • Operating frequency of compressor depend on the difference of the temperature (= compressor off temp. - intake air temp.) • Compressor off temp. = setting temp.+3.0°C on temp. = setting temp. • Condition of compressor turned off - When intake air temperature reach...
Page 29 - Sleep timer operation for cooling cycle; Sleep timer operation
27 Service Manual Operation 1. Sleep timer operation for cooling cycle • While in cooling mode operation, 60 min. later since the start of the sleep timer, the setting temperature increase by 1°C. After another 30min. elapse, it increases by 1°C again. 2. Sleep timer operation for heating cycle • Wh...
Page 30 - Auto restarting operation; Setting speed of; Operating Mode; CT1 control; CT2 control; Protection from total current control; DC Peak Current Error by a fault signal of IPM; DC Peak Current Error by the Outdoor Fan Lock; Protection from DC Peak Current
Room Air Conditioner 28 Operation Auto restarting operation Forced operation • When the power is restarted after a sudden power failure while in appliance operation, the mode before the power failure is kept on the memory and the appliance automatically operates in the mode on the memory. • Operatio...
Page 31 - Portection from overheating of power module
29 Service Manual Operation • If the temperature of the heat sink TH. reaches over Toff, the Compressor stop instantly.• It will be limited the compressor operating frequency according to the heat sink TH.(refer to below FIG.)• It will be blink 4 times, when the thermistor is open or short, also the...
Page 32 - Room Air Conditioner 30; Remote Control Operations; Meaning of the symbols shown on the liquid; Liquid crystal display
Room Air Conditioner 30 Remote Control Operations Operation The remote control sends signals to the appliance. Meaning of the symbols shown on the liquid crystal display: Signal transmitter Automatic fan speedLow fan speedMedium fan speedHigh fan speedCooling indicatorDehumidification indicatorFan o...
Page 33 - Disassembly; Disassemble the front panel
31 Service Manual Disassembly Disassembly Indoor Unit Disconnect the unit from power supply before mak- ing any checks. Be sure the power switch is set to “OFF”. • 2. • • 1.Disassemble the front panel Open the front panel, loosen the clasp which fix on the front panel, then lift it up can disassembl...
Page 36 - outdoor Unit
Service Manual 34 Disassembly outdoor Unit 1. • 2. • 3. • Top cover Screws Rear grill Screws Screws Front grill Take down the top cover Screw off the 6pcs screw around the top cover,lift the unit up can take down the top cover. Disassemble the rear grill Screw off 4pcs tapping screw of rear grill, t...
Page 40 - Room Air Conditioner 38; Wiring Diagram; Schematic Diagram
Room Air Conditioner 38 Wiring Diagram Schematic Diagram Indoor Unit Models: Schematic Diagram TRANSFORMER M2 SWING TR-OUT ROOM TUBE AP1 RT2 RT1 TR-IN PTC(FUT) X100 X303 RX ｉ ｊ ｋ TEM.SENSOR TUBE ROOMTEM.SENSOR SWING MICRO SWITCH FAN M1 FAN MOTOR DISPLAY MOTOR 牟 牟 evaporator AC-L N1 X111 BKBN 3 XT 2 ...
Page 41 - IPM; PCB
3 9 Service Manual Schematic Diagram Outdoor Unit Models: BK X1 C1 X203 X204 AC-L BK BN 6 5 YE 4 3 1 BN BN BN BL YE WH WH E FAN MOTOR M4 E YEGN X106 X107 CN10 X13 RLY1 NO COM BL BN X110 LAC IPM COMPRESSOR WH BK OR OR - + WH BK C2 BK P2 P1 - AC + AC V X W X5 U V YE BL U1 RD COMPRESSOR U M3 RT4 X2 TEM...
Page 42 - Service Manual 40; • TOP VIEW
Service Manual 40 • TOP VIEW Schematic Diagram • TOP VIEW Models:
Page 43 - • BOTTOM VIEW
41 Room Air Conditioner • TOP VIEW Schematic Diagram • BOTTOM VIEW Outdoor Unit Models:
Page 44 - Room Air Conditioner 42; Troubleshooting Guide; INDOOR UNIT; Cooling & Heating Models; Refrigeration Cycle Diagram
Room Air Conditioner 42 Troubleshooting Guide Troubleshooting Guide INDOOR UNIT OUTDOOR UNIT HEATEXCHANGE(EVAPORATOR) HEATEXCHANGE(CONDENSER) EER COMPRESSOR ACCUMULATOR GAS SIDE 3-WAY VALVE LIQUID SIDE 3-WAY VALVE COOLING HEATING REVERSINGVALVE Cooling & Heating Models Refrigeration Cycle Diagra...
Page 46 - • Procedure; (5) Use torque wrench to tighten the service port; CAUTION: Do not leak the gas in the air during Air purging.
Service Manual 44 Troubleshooting Guide Required tools : hexagonal wrench, adjustable wrench, torque wrenches, wrench to hold thejoints, and gas leak detector. The additional gas for air purging has been chargedin the outdoor unit.However, if the flare connections have not be donecorrectly and there...
Page 47 - (6) O p e r a t e t h e a i r c o n d i t i o n e r a t t h e c o o l i n g; Pumping Down
45 Room Air Conditioner 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 position. – Be sure to use a hexagonal wrench to operate the valve stems. (2) Opera...
Page 48 - (1) Confirm that both the liquid side valve and the
Service Manual 46 Troubleshooting Guide Re-air Purging (Re-installation) • Procedure (1) Confirm that both the liquid side valve and the gas side valve are set to the closed position. (2) Connect the charge set and a gas cylinder to the service port of the Gas side valve. – Leave the valve on the ga...
Page 49 - Balance Refrigerant of the 3-way Valve; are set to the back seat.
47 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...
Page 50 - (1) Connect the vacuum pump to the center hose; (4) Disconnect the charge hose from the vacuum; Vacuum pump
Service Manual 48 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 or less). ...
Page 51 - Gas Charging; (1) Connect the charge hose to the charging; (4) Immediately disconnect the charge hose from; (5) Mount the valve stem nuts and the service
49 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-con- nected from the vacuum pump to the valve atthe bottom of the cylinder. – If you are using a gas cylinder, also ...
Page 52 - Trouble analysis; Cycle Parts; Check and insert the plug tightly
Service Manual 50 Troubleshooting Guide Trouble analysis Cycle Parts Breaker tripped or fuse burnt out When set the breaker to ON, it will trip off at once. Test the insulative resistance for earthing, to confirm whether unit is current leakage or not When turn on the unit, the breaker will trip in ...
Page 53 - Poor cooling
51 Room Air Conditioner Troubleshooting Guide Poor cooling (heating) effect Filters of indoor unit are blocked Clean the filters regularly Heat exchanger of outdoor unit is blocked Clean the dust accumulated on the surface of the heat exchanger Leakage occurs between high and low pressure inside com...
Page 55 - Malfunction display
53 Room Air Conditioner Troubleshooting Guide Malfunction display Blink 1 time Compressor is running Blink 2 times High-pressure protection stop of compressor Blink 3 times Exhaust protection stop Blink 4 times Communication malfunction stoop (including indoor unit and SIPM) Blink 5 times SIPM modul...
Page 60 - Voltage table of 20K sensor resistance value
Service Manual 58 Troubleshooting Guide （℃） （KΩ） （V） *15K （℃） （KΩ） （V） *8.1K （℃） （KΩ） （V） *8.1K -20 192 0.47 32 14.79 2.87 84 2.194 4.51 -19 181.4 0.5 33 14.18 2.93 85 2.125 4.52 -18 171.4 0.52 34 13.59 2.98 86 2.059 4.53 -17 162.1 0.55 35 13.04 3.03 87 1.996 4.55 -16 153.3 0.58 36 12.51 3.08 88 1.9...
Page 61 - Voltage table of 50K sensor resistance value
59 Room Air Conditioner Troubleshooting Guide （℃） （KΩ） （V） *15K （℃） （KΩ） （V）*8.1K （℃） （KΩ） （V） *8.1K -20 484.5536 0.04 32 36.9866 0.52 84 5.4621 2.2 -19 457.3636 0.05 33 35.4618 0.54 85 5.2908 2.24 -18 431.8647 0.05 34 34.0079 0.56 86 5.1257 2.28 -17 407.9418 0.05 35 32.6212 0.58 87 4.9665 2.32 -16 ...
Page 62 - GRUPPO
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