LG R1203 Svc Manual
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LG R1203 Svc Manual

LG R1203 Svc Manual

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Room Air Conditioner
SVC MANUAL(Exploded View)
MODEL : R1203, M1203R, R1203H, R1403
M1003L, M1203L, LWC1213AAG/ACG
WR-1210, WM-1211
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

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Summary of Contents for LG R1203

  • Page 1 Internal Use Only http://biz.lgservice.com Room Air Conditioner SVC MANUAL(Exploded View) MODEL : R1203, M1203R, R1203H, R1403 M1003L, M1203L, LWC1213AAG/ACG WR-1210, WM-1211 CAUTION Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.

  • Page 2: Table Of Contents

    4. The value should be over 1MΩ. tance test to protect the customer from being exposed to shock hazards. - 2 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 3: Specifications

    22 (W x H x D) (mm) 600 x 380 x 567 * DB:Dry Bulb ** WB:Wet Bulb - 3 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 4 22 600 x 380 x 567 (W x H x D) (mm) * DB:Dry Bulb ** WB:Wet Bulb - 4 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 5 22 (W x H x D) (mm) 600 x 380 x 567 * DB:Dry Bulb ** WB:Wet Bulb - 5 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 6: Features

    This odor, caused by fine dust particles on the the Cool position heater, will disappear quickly. Off: Stops the operation of air swing. - 6 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 Note: The Sleep Mode will be operated at low fan speed for quiet sleeping. The temperature will automatically rise by 1°C over the next 30 minutes and by 2°C in 1 hour for comfortble sleeping. REMOCON SIGNAL RECEIVER - 7 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 8 If you push this button, the fan stops when the compressor stops cooling. Approximately every 3 minutes the fan will turn on and check the room air temperature to determine if cooling is necessary. REMOCON SIGNAL RECEIVER - 8 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 9: Disassembly Instructions

    (Refer to the circuit diagram found on pages 34~37 in this manual and on the control box.) Figure 3 - 9 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 10: Air Handling Parts

    5. Remove the clamp which secures the fan. 6. Remove the fan. (See Figure 7) 7. Re-install by referring to the removal procedure. Figure 7 - 10 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 11: Shroud

    Figure 10 6. Remove the compressor. (See Figure 10) 7. Re-install the components by referring to the removal procedure, above. - 11 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 12: Capacitor

    5. Remove the rotary switch. 6. Re-install the components by referring to the above removal procedure. (See Figure 14) Figure 14 - 12 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 13: Motor

    5. Remove the evaporator. 6. Re-install the component by referring to notes. (See Figure 17) Figure 17 - 13 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 14: Capillary Tube

    Open valve C. Discharge the line at the manifold connection. 5) The system is now ready for final charging. - 14 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 Leak detector, Tubing cutter, Hand Tools to remove components, Service valve. Figure 18B-Charging Figure 18A-Pulling Vacuum - 15 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 16: Installation

    If the air conditioner is used in hot and a high humidity zone, exchange the HOLE RUBBER for the DRAIN PIPE.(See figure 20, figure 21.) - 16 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 17: How To Install

    SILL SUPPORT BOLT SCREW(TYPE A) SCREW(TYPE B) SCREW(TYPE C) FOAM-STRIP FOAM-PE UPPER GUIDE FOAM-PE FRAME GUIDE WINDOW LOCKING BRACKET - 17 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18 Frame Curtain is restricted. Window stool Front Angle Figure 22 Upper guide Window Sash Cabinet Frame Curtain Figure 23 - 18 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 19 9. Attach each Frame curtain to the window sash by using screws (Type C). (See Figure Type C Figure 27 - 19 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 20: Outside Dimensions

    Figure 33 4. TROUBLESHOOTING GUIDE 4.1 OUTSIDE DIMENSIONS unit: mm(inch) Auto Swing High Cool Cool Low Cool Thermostat Operation - 20 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 21: Piping System

    LIQUID LIQUID OUTLET PRESSURE DROP (LIQUID REFRIGERANT) HIGH PRESSURE VAPOR LIQUID REFRIGERANT CAPILLARY TUBE LOW PRESSURE VAPOR Figure 34 - 21 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 22: Troubleshooting Guide

    Satisfactory operation with Repair clogging in refrigera- temperature difference of tion circuit. inlet & outlet air ; 44~50°F(7~10°C) - 22 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 23 Regular but fails to start. Irregular motor insulation ( Replacement of compressor (locking of rotor, metal). Replacement of compressor (Motor damaged) - 23 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 24 • Check the PCB Is the voltage No.20 of Micom pattern. DC 5V? Exchange Main PCB Ass'y. - 24 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 25 • Connect LEAD Wire to Is the wire connection of RY-COMP again. RY-COMP all right? • Check the RY-COMP. - 25 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 26 • Check the pattern of CN-DISP1 of Main PCB Main & Display PCB. Ass'y DC 5V? • Reference to OWNER'S MANUAL. - 26 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 27 Q13G, Q14G operate normally • Exchange Q12G, on main PCB Ass'y? Q13G, Q14G. • Exchange the display PCB Ass'y. - 27 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 28 • Check the PCB Is the voltage No.24 of Micom pattern. DC 5V? Exchange Main PCB Ass'y. - 28 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 29 • Connect LEAD Wire to Is the wire connection of RY-COMP again. RY-COMP all right? • Check the RY-COMP. - 29 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 30 Ass'y DC 5V? • Connect connector to Is the connection of CN-DISP2 exactly. CN-DISP2 all right? • Exchange Receiver Ass'y. - 30 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 31 CN-DISP2 all right? Does the IC03G • Exchange IC03G. operate normally on main PCB Ass'y? • Exchange the display PCB Ass'y. - 31 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 32 Rotary Check for continuity, refer to the wiring diagram for terminal identification. Replace the switch if circuit is open. - 32 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 33 Copper tubing Remove the cabinet carefully and rearrange tubing not to contact cabinet, compressor, shroud, and barrier. - 33 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 34: Schematic Diagram

    N: Non Service Parts LOCATION Q'TY DESCRIPTION MARKS PER SET POWER CORD ROTARY SWITCH FAN MOTOR CAPACITOR THERMOSTAT OVERLOAD PROTECTOR COMPRESSOR - 34 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 35 N: Non Service Parts LOCATION Q'TY DESCRIPTION MARKS PER SET POWER CORD ROTARY SWITCH FAN MOTOR CAPACITOR THERMOSTAT COMPRESSOR - 35 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 36 PER SET POWER CORD ASSY MOTOR ASSY COMPRESSOR MAIN P.W.B ASSY DISPLAY P.W.B ASSY THERMISTOR CAPACITOR CONNECTOR ASSY OVERLOAD PROTECTOR - 36 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 37 LOCATION Q'TY DESCRIPTION MARKS PER SET POWER CORD ROTARY SWITCH FAN MOTOR CAPACITOR THERMOSTAT OVERLOAD PROTECTOR COMPRESSOR ELECTRIC HEATER - 37 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 38: Electronic Control Device

    5.2 ELECTRONIC CONTROL DEVICE I MODEL: M1203R/WM-1211 A : Heat Pump Only - 38 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 39 I MODEL: M1003L/M1203L A : Heat Pump Only - 39 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 40: Components Location(For Main P.c.b Asm)

    250V, T2A CO1J R01J CN - SYNC FUSE C01D D05D D04D CN - WORK D03D D02D I MODEL: M1003L/M1203L - 40 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 41: Components Location(For Display P.c.b Asm)

    5.4 COMPONENTS LOCATION(FOR DISPLAY P.C.B ASM) I MODEL: M1203R/WM-1211 6871A2011B PWB P/NO:6870A90004D-3 I MODEL: M1003L/M1203L - 41 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 42: Exploded View

    352111 W0CZZ 269310 352115 W0CZZ 268712 137215 238310 266002 352113 135500 149410 146812 137215 268714 264110 135500 35211A 264110 - 42 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 43 550140 135312 249950 263230 35211A 135313 152302 552111 W0CZZ 268712 238310 352111 352115 352113 147581 268714 264110 137215 135000 - 43 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 44 753010 567502 135313 152302 135312 130410 554160 550140 147582 147581 249950 266003 352111 269300 W0CZZ 352113 149410 35211A 264110 - 44 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 45 135313 152302 135312 130410 554160 550140 147582 147581 552111 249950 266003 352111 269300 352115 W0CZZ 352113 149410 35211A 264110 - 45 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 46 152302 135312 130410 554160 550140 267110 147582 147581 552111 249950 263230 352111 W0CZZ 352115 268711B 352113 268711A 264110 35211A - 46 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 47 349001 567502 147582 135312 130410 554160 550140 267110 552111 249950 263230 352111 W0CZZ 352115 268711B 352113 268711A 264110 35211A - 47 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 48 349480 349001 567502 147582 135312 130410 554160 550140 552111 249950 266003 352111 269300 352115 W0CZZ 352113 149410 35211A 264110 - 48 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 49 FEBRUARY, 2008 P/NO : 3828A30032E...

This manual is also suitable for:

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