LG UYH153ALE31 Svc Manual Download Page 7

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LGE Internal Use Only

1.3 SELF-DIAGNOSIS

FUNCTION:

If the unit has a malfunction, a green OPERATION LED located on the Display PCB used by the unit to indicate the errors.

USE:

If the customer has to register a complaint to the service center, he can be very clear about registering the complaint that what is

happening & by referring the user's manual the customer can clearly define the problem.

So that the engineer should go fully prepared with the prescribed tools to be used regarding that problem. It also keeps the customer

aware about the unit.

Here are some of the problems defined below for which the LED indicates by flashing.
The errors are the mentioned which is as follows:

•

Electrical Controls

Normal

OFF

No power / failed board

Fault Codes

CH 01

Indoor Air Thermistor Error

CH 02

Indoor Coil Thermistor Error

CH 07

Themostat Wiring Error

CH 09

EEPROM Check Sum Error

CH 10

Indoor Fan Error

CH 34

High Pressure Switch Error

CH 44

Outdoor Air Thermistor Error (PTHP Only)

CH 45

Outdoor Coil Thermistor Error (PTHP Only)

CH 67

Outdoor Fan Error

Summary of Contents for UYH153ALE31

Page 1: ... conditioner Heat Pump SVC MANUAL Exploded View MODEL LP153HD3B CAUTION Before Servicing the unit read the safety precautions in General SVC manual Only for authorized service personnel Internal Use Only http biz lgservice com ...

Page 2: ... washable anti fungus Cooling Heating L Look Slide In Out Electric Heater Micom 12h On Off Top 2 2 2 Manual Wall Thermostat 54 86 12 2 30 54 86 12 2 30 52 115 YA Thermistor 40 75 2R 10C 19FPI 3R 17C 20FPI 3 2 1 1 066 406 505 42 16 19 7 8 PA140M2A PSC ESTER OIL VG74 440 INTERNAL BLDC BLDC 20 706 4 3 51 49 64 R410A 910 32 1 Rotary Non Tropical Hot Start Look Cabinet Type Chassis Type Special Functio...

Page 3: ...um of three minutes to have a time of equalizing the refrigerant pressures for optimizing cycling Fan Only Setting High Low The fan can run at HIGH or LOW speed without COOLING or HEATING to provide air circulation and ventilation Indoor Fan Speed Selections High Low The fan can run at HIGH or LOW speed for either COOLING or HEATING Two Fan motors The unit has two fan motors to provide quiet opera...

Page 4: ... unit has a condensate drain valve to prevent water from collecting or freezing in the basepan Quick Heater Recovery The unit is designed to operate the electric heater to warm the room to the temperature set point as soon as heat pump cycle is on in heating This feature has an advantage of reducing the time to reach the set point and improving the temperature increase for better comfort Reverse C...

Page 5: ...sary in the room set the ventilation lever to the OPEN position The damper is opened and outdoor air is drawn into the room This will reduce the cooling or heating efficiency When the air conditioner has performed a cooling or heating operation and is turned off or set to the fan position wait at least 3 minutes before resetting to the cooling operation A slight heat odor may come from the unit wh...

Page 6: ...uns continually for normal heating operation TIMER SHUT OFF TIME You will usually use shut off time while you sleep If unit is running use Timer to set number of hours until shut off For your sleeping comfort once Time is set the Temperature setting will raise 2 F after 30 minutes and once again after another 30 minutes Push Timer to cycle through the settings from 1 Hour 2 Hours 12 Hours maximum ...

Page 7: ...ne the problem So that the engineer should go fully prepared with the prescribed tools to be used regarding that problem It also keeps the customer aware about the unit Here are some of the problems defined below for which the LED indicates by flashing The errors are the mentioned which is as follows Electrical Controls ON Normal OFF No power failed board Fault Codes CH 01 Indoor Air Thermistor Er...

Page 8: ...e Limit 1 Limit 2 Limit 3 Lowest Temp Highest Temp Lowest Temp Highest Temp Cooling Operation 3 4 5 Heating Operation Cooling Electric Heater Heat Pump OFF OFF Cooling Electric Heater ON OFF Cooling Only Heat Pump Only Unit Type ON OFF 7 ON ON 6 1 4 ADDITIONAL CONTROLS REMOVING THE FRONT GRILLE Additional controls are available after removing the front grille and option cover of control box To rem...

Page 9: ... Temperature Temperature Limit 1 Limit 2 Limit 3 Lowest Temp Highest Temp Lowest Temp Highest Temp Cooling Operation Heating Operation 3 4 5 REMOVING THE FRONT GRILLE Additional controls are available after removing the front grille and option cover of control box To remove the front grille pull out the bottom of front grille and then lift up To replace the front grille place the tabs over the top...

Page 10: ...tch located at the Front Desk Control panel When the front desk switch is ON the fan operates according to the setting without working compressor and heater When the front desk switch is OFF the unit can operate according to the setting of controls REMOTE WALL THERMOSTAT When the wires are connected the unit will be controlled by a remote wall thermostat The thermostat connections supply the 24 Vo...

Page 11: ...struction in this manual for the Remote Wall Thermostat REMOTE LOCAL CONTROL When remote local switch 1 is on it allow the unit to operate by the control of Remote Wall Thermostat The unit control by knobs are not available ENERGY SAVER The energy saver switch 2 is on This switch is set at continuous fan to provide continuous fan operation in cool or heat modes When the switch is off the continuou...

Page 12: ...nto place This Room Air Conditioner PTAC discharges air from the top of the unit through reversible 2 position discharge grille louvers The unit is shipped from the factory with the discharge grille louvers at an angle of 40 off vertical In the alternate position the louvers will be at an angle of 15 off vertical To adjust air direction remove the front grille Remove the 4 screws that fasten the d...

Page 13: ...to section 2 1 1 2 Remove the two screws which fasten the control box See Figure 2 3 Pull the control box from the Air guide 4 Remove the control box cover See Figure 3 5 Disconnect wire housings on the control box 6 Pull the control box assembly out from the unit See Figure 4 7 Re install the components by referring to the removal procedure Figure 2 Figure 3 Figure 4 ...

Page 14: ...Refer to section 2 1 2 3 Remove the 4 screws which fasten the Evaporator See Figure 5 4 Remove the top cover assembly net steel brace See Figure 6 5 Remove the 6 screws which fasten the Air guide 6 Pull the Air guide assembly out from the unit See Figure 7 7 Remove the 2 screws which fasten the electric heater in the left hand side 8 Pull the electric heater towards left for a while and then lift ...

Page 15: ...ve the 4 screws which fasten the indoor motor and the earth wire See Figure 10 6 Remove the supports on both sides 7 Pull the cross flow fan out from the air guide 8 Re install the components by referring to the removal procedure 2 2 3 AXIAL FAN 1 Remove the brace 2 Remove the 4 screws which fasten the condenser with the shroud and the basepan See Figure 11 3 Remove the condenser sideways carefull...

Page 16: ...charge the refrigerant system using a refrigerant recovery system If there is no valve to attach the recovery system install one such as a WATCO A 1 before venting the refrigerant Leave the valve in place after servicing the system 2 Disconnect the 3 leads from the compressor 3 After purging the unit completely unbraze the suction and discharge tubes at the compressor connections 4 Remove the 3 nu...

Page 17: ...e supply cord of this appliance is damaged it must be replaced by an exact replacement part The special cord means the cord which has the same specification marked on the supply cord fitted to the unit 2 3 6 P C B 1 Remove the escutcheon 2 Remove the two knobs 3 Remove the 2 screws which fasten P C B cover 4 Disconnect all the leads which connected to the P C B 5 Remove the two screws which fasten...

Page 18: ...Discharge the refrigerant completely 3 Remove the control box assembly Refer to section 2 1 2 4 Remove the 4 screws which fasten the evaporator at the left side and the right side 5 Move the evaporator sideward carefully and then unbraze the interconnecting tube at the evaporator connectors 6 Remove the evaporator 7 Re install the components by referring to notes See Figure 20 2 4 3 CAPILLARY TUBE...

Page 19: ... at the manifold connection 5 The system is now ready for final charging 6 Recharge as follows 1 Refrigeration cycle systems are charged from the high side If the total charge cannot be put in the high side the balance will be put in the suction line through the access valve which you installed as the system was opened 2 Connect the charging cylinder as shown in Figure 16B With valve C open discha...

Page 20: ...ent pinch off tool capable of making a vapor proof seal leak detector tubing cutter hand tools to remove components service valve A COMPOUND GAUGE R410A EVAPORATOR LOW PRESSURE SIDE COMPRESSOR CAPILLARY TUBE CONDENSER HIGH PRESSURE SIDE SEE INSETS BELOW MANIFOLD GAUGE B Figure 16 A Pulling Vacuum Figure 16 B Charging A B EXTERNAL VACUUM PUMP COMPOUND GAUGE R410A A CHARGING CYLINDER LOW HI B C ...

Page 21: ...ttached The insulation strip is provided with the box 2 After assembly of sleeve Front grille the gap should be 20 from both sleeve grille For assembly PTAC Model refer the diagram given below 1 Take out the insulation strip from the upper packing 2 Attach the insulation strip onto the rear upper side of the wall sleeve 3 If anyone would like to improve unit energy efficiency it is recommended the...

Page 22: ... case may be installed flush with the finished indoor wall Mounting an outdoor grille or louver section to the building face may cause a space between the outdoor coil and the louver section Air splitters aligned with the ends of the outdoor coil must be installed between the outdoor coil inlet and outlet air streams Gaps between the outdoor coil and the louver section may allow condenser air reci...

Page 23: ...mum exterior dimensions are not met refer to FRAME AND BRICK VENEER INSTALLATION The outside edge of the wall case should extend at least 1 4 beyond the outside wall This is necessary for proper caulking to prevent sealing thedrain holes in the rear flange of the wall case and to facilitate the installation of an accessory drain if used 2 The wall case should be secured to the wall at both sides U...

Page 25: ...K 1 4 M IN POW ER S U PPLY CO N D U IT W ALL RECEPTACL E BY O TH ERS FINIS H ED FLOO R O R T O P O F CA RPET Caulk around perimeter of wall case all four sides w here it j oins t he buildin g I n terior and E xterior CAULK 1 4 CAULK LINTEL ROOM CABINET 2 M IN M O U NTING S CREW S BY IN STALLER WALL CASE O U TD OO R G RI LLE SI D E CH A NNE L 3 M IN 5 M A X 1 5 1 6 FINIS H ED FLOO R O R T O P O F C...

Page 26: ...or See Figure 1 2 Remove the front gille by pulling it out at the bottom to release it then lift it up along the unit top front See Figure 2 3 Slide the unit into the wall sleeve and secure with 6 screws through the unit flange holes See Figure 3 4 Reinstall the front grille by hooking the top over the unit top then pushing it in at the bottom See Figure 4 Figure 1 Figure 2 Figure 3 Figure 4 ...

Page 27: ...r supply requirements 3 3 1 ELECTRICAL DATA FOR 208 230V MODEL 3 3 2 ELECTRICAL SAFETY IMPORTANT GROUNDING INSTRUCTIONS The air conditioner has a three prong grounding plug on its power supply cord which must be plugged into properly grounded three prong wall receptacle for your protection against possible shock hazard FUSE Use a time delay fuse or circuit breaker Refer to the nameplate for proper...

Page 28: ...s Figure 22 3 Install the new door assembly with the key lock by bowing the door with both hands and aligning the door hinge pins with their bracket in the front Figure 23 Important Note Personal Risk Hazard Underwriter s Laboratories Inc listed For institutional use only where supervisory monitoring is available Any other use may increase the risk of personal injury or property damage Note The in...

Page 29: ...ote it on the delivery receipt Unit must be stored in its original shipping carton in a dry secure place prior to its installation and use Installation The installation and servicing of the equipment referred to in this booklet should be performed by qualified experienced technicians WARNING Hazardous Voltage Disconnect all electric power including remote disconnects before servicing Follow proper...

Page 30: ...7 Then install one of the three rubber elbows ref Figure 31 at the inlet of the spraying tube and through the rubber grommet 10 Place the top cover assembly back into the unit 11 Install tube 1 and tube 2 ref Figure 31 on the pump assembly using the rubber elbows as shown in Figure 28 12 Position pump assembly to the basepan as shown in Figure 29 and fasten the pump bracket to the basepan using th...

Page 31: ...as shown in Figure 32 34 whichever is applicable Make sure to fasten the pump wire through the wire clip on the back side of the control barrier as shown in Figure 33 15 Assembly the unit back following the reverse order of disassembly NOTE All tube should be inserted into rubber elbows by at least 1 2 Figure 31 Pump assembly Tube 1 Tube 2 Rubber elbows 3 Spraying Tube Figure 33 Figure 32 BL BL ...

Page 32: ... sleeve These items may be removed from inside of the building Note The sleeve stiffener must be taken out before the rear sleeve enclosure panel can be removed from the sleeve 2 Prepare the stamped aluminum grille for installation on the sleeve by inserting the six 6 plastic grommets into the square holes located near the outer edges of all four sides of the grille With the grille positioned so t...

Page 33: ...er before servicing could result in death or serious injury Important Note The unit OFF switch does not disconnect all electrical power to this unit Receiving Upon receipt of the product inspect the shipping carton for signs of visible damage Report any damage or shortage to the carrier and note it on the delivery receipt The product must be stored in its original shipping carton in a dry secure p...

Page 34: ...rovided See Figure 39 for finished left hand side installation If the unit chassis is to be installed right away install the condenser grille to wall sleeve with hardware provided See condenser grille installation instructions If the unit chassis will not be installed right away replace the rear enclosure panel in the wall sleeve This will help protect the inside of the building from weather damag...

Page 35: ...cted to the drain system inside of the building Install the two blank off plates C and gaskets A on the outdoor portion of the wall sleeve as shown in Figure 40 These components may be installed after the sleeve is secured in the wall opening just prior to the installation of the condenser grille and chassis Leveling Legs Model AYLL101 Description Leveling legs are designed to provide extra front ...

Page 36: ...side to side Provide a slight slope one quarter bubble in the sight glass toward the outside Check the level again after the unit has been installed Adjust the legs as needed Installation on Wall Sleeve 1 Drill four 1 8 diameter holes in the wall sleeve two on each side using the leveling legs as a template Caulk around screws to prevent water leaks 2 Attach the legs to the wall sleeve using the s...

Page 37: ...ocedures to ensure the power can not be inadvertently energized Failure to disconnect power before servicing could result in death or serious injury Important Note The unit OFF switch does not disconnect all electrical power to this unit CAUTION Use Copper Conductors Only Unit terminals are not designed to accept other types of conductors Failure to use copper conductors may result in equipment da...

Page 38: ...iscard the red lead from the wire assembly 2 Connect the black lead to the center terminal of the fuse holder 3 Connect the white lead to the common C terminal on the capacitor 4 Connect the ground wire to the partition panel where the ground wire on the power cord was located Use the supplied green ground screw 5 Connect the white lead of the wire assembly at the junction box to the white lead of...

Page 39: ...switch does not disconnect all electrical power to this unit CAUTION Use Copper Conductors Only Unit terminals are not designed to accept other types of conductors Failure to use copper conductors may result in equipment damage Important Note All wiring must comply with applicable local and national codes Type and location of fused disconnect switch es must comply with all applicable codes Failure...

Page 40: ...older Kit Installation With Subbase See previous section for installation in the control panel 1 Remove both knockouts at the fuse holder location Figure 50 2 Install the fuse holders using screws provided The side connector tab on the fuse holders should be towards the left 3 Connect a stripped BK 9 wire to the center of the quick connect tab of the fuse holders Wire nut the other end of this wir...

Page 41: ... performed by qualified experienced technicians WARNING Hazardous Voltage Disconnect all electric power including remote disconnects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvertently energized Failure to disconnect power before servicing could result in death or serious injury Important Note The unit OFF switch does not disconnect all electrical ...

Page 42: ...onnects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvertently energized Failure to disconnect power before servicing could result in death or serious injury Important Note The unit OFF switch does not disconnect all electrical power to this unit CAUTION Use Copper Conductors Only Unit terminals are not designed to accept other types of conductors Fai...

Page 43: ...ring Access Subbase Box Assy Low Voltage Compartment 2 13 16 71 mm 11 13 16 300 mm A B F C E D D E Wall Sleeve Outdoor Side Wall Sleeve Inside Edge Back of Flange A 13 3 4 2 3 4 2 5 8 13 7 8 352 mm 3 1 16 78 mm Left End View Concentric Knockouts In Bottom Ground Screw Location Receptacle Provided Inside subbase Accessory Top View Concentric Knockouts In Rear Field Wiring Line Voltage Field Wiring ...

Page 44: ...1 to follow the refrigeration cycle and the flow of the refrigerant in the cooling cycle MOTOR COMPRESSOR OIL LIQUID REFRIGERANT CAPILLARY TUBE OUTSIDE COOLING AIR FOR REFRIGERANT PASS THROUGH SUCTION LIME COOL LOW PRESSURE VAPOR COOLED AIR COMPLETE LIQUID BOIL OFF POINT LIQUID PRESSURE DROP ROOM AIR HEAT LOAD VAPOR INLET HOT DISCHARGED AIR LIQUID OUTLET HIGH PRESSURE VAPOR LIQUID PEFRIGERANT LOW ...

Page 45: ...g Check of outdoor coil heat exchanger the fan operation Check gas leakage Repair gas leak Replacement of unit if the unit is beyond repair Satisfactory operation with temperature difference of inlet outlet air 44 6 50 F 7 10 C Check heat load increase Unexpected residue Overloaded Circuit Check of inside gas pressure Adjusting of refrigerant charge Malfunction of compressor Replacement of compres...

Page 46: ...capacitor Irregular motor resistance Irregular motor insulation Replacement of fan motor Regular but fails to start Replacement of compressor locking of rotor metal Improper thermostat setting Loose terminal connection Improper wiring Irregular motor resistance Irregular motor insulation Replacement of compressor Motor damaged Drop of power voltage Check capacitor Replacement Only compressor fails...

Page 47: ...if motor shaft will not rotate replace the motor Check voltage See limits on this page If not within limits call an electrician Check bearings Does the fan blade rotate freely If not replace fan motor Pay attention to any change from high speed to low speed If the speed does not change replace the motor Check grommets if worn or missing replace them If cracked out of balance or partially missing r...

Page 48: ...eck the position of knob If not at the coldest setting advance the knob to this setting and restart unit Check continuity of the thermostat Replace thermostat if circuit is open Check the capacitor Replace if not within 10 of manufacturers rating Replace if shorted open or damaged Check the compressor for open circuit or ground If open or grounded replace the compressor Check the compressor overlo...

Page 49: ...e closed over a large area on the coil surface head pressures will increase causing the compressor to cycle Straighten the fins or replace the coil Test capacitor Check the terminals If loose repair or replace Check the system for restriction If restricted clean of replace Close if open Determine if the unit is properly sized for the area to be cooled Check the set screw or clamp If loose or missi...

Page 50: ...RY TUBE HEAT CHECK VALVE HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE CONDENSER COMPRESSOR ACCUMULATOR Cooling Heatig REVERSING VALVE High Pressure S W 41 8 32 6 kgf cm2 G 595 463 lbf in2 G Th1 Th2 H P Th3 Th4 LOC Description PCB Connector Th1 Indoor Air Thermistor CN IDAT2 Th2 Indoor Coil Thermistor CN IDPT Th3 Outdoor Coil Thermistor CN ODT Th4 Outdoor Air Thermistor ...

Page 51: ...OR TB2 GN YL LIVE BK NEUTRAL WH CN 4WAY CN ICR RY COMP CN EXT L CN EXT N CN_N INDOOR FAN MOTOR MAIN PWB ASM YL BL WH BK RD YL BL WH BK RD OUTDOOR FAN MOTOR YL BL WH BK RD YL BL WH BK RD BK BK Pressure Switch BK BK BK BK F HERM BL RD BR OLP R COMP WH TB1 POWER INPUT INDOOR AIR THERMISTOR INDOOR COIL THERMISTOR OUTDOOR AIR THERMISTOR OUTDOOR COIL THERMISTOR CN IDPT CN IDAT2 CN MOTOR_IDF CN MOTOR_ODF...

Page 52: ...110 552206 D 346810 152302A 359011 342800 337000 349600A 263230C W5210B 263230A 263230B CA 552113 552116 552202 566000 552112 352116 352115A 435300A 261704 135500B 435301 W6631B 249950 249300 352115B 235041 135500 W49810A W49810B 749750 149400B 349600C 152302C 149400A W6631D W6631C Description Location No Indoor Air Thermistor 263230A Indoor Coil Thermistor 263230B Outdoor Air Thermistor 263230C O...

Page 53: ......

Page 54: ...January 2013 Service call Number 888 LG Canada 888 542 2623 Service call Number 1 888 865 3026 US CANADA ...

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