SPLIT-TYPE, AIR CONDITIONERS SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS HFC utilized No. OB329 SERVICE MANUAL Wireless type Models R410A MSC-A07YV MSC-A09YV MSC-A12YV - E1 (WH) (WH) (WH) E1 E1 CONTENTS 1. TECHNICAL CHANGES ····································3 2. PART NAMES AND FUNCTIONS······················3 3. SPECIFICATION·················································5 4. NOISE CRITERIA CURVES ·······························6 5. OUTLINES AND DIMENSIONS ·························7 6. WIRING DIAGRAM ············································8 7. REFRIGERANT SYSTEM DIAGRAM ················8 8. MICROPROCESSOR CONTROL ······················9 9. SERVICE FUNCTIONS ····································17 10. TROUBLESHOOTING······································19 11. DISASSEMBLY INSTRUCTIONS·····················26 12. PARTS LIST······················································28 Indication of model name MSC-A07YV MSC-A09YV MSC-A12YV - E1 E1 E1 NOTE: ·This manual describes technical data of indoor units. ·As for outdoor units MU-A07/A09/A12YV - E1 , refer to the service manual OB330. ·As for outdoor units MUH-A07/A09/A12YV - E1 , refer to the service manual OB331. ·As for outdoor units MUX-A10/A19/A20/A25/A26WV - E1 , refer to the service manual OB307 REVISED EDITION-A. ·As for outdoor units MUX-A22WV - E1 , refer to the service manual OB318. ·As for outdoor units MXZ-A18/A26/A32WV - E1 , refer to the service manual OB319. 1 TECHNICAL CHANGES MSC-A07WV- E1 MSC-A07YV- E1 MSC-A09WV- E1 MSC-A09YV- E1 MSC-A12WV- E1 MSC-A12YV- E1 1. Design of front panel has changed. 2. Air filter has changed to the catechin air filter. 2 PART NAMES AND FUNCTIONS MSC-A07YV - E1 MSC-A09YV - E1 MSC-A12YV - E1 INDOOR UNIT Air cleaning filter (white bellows type) Front panel Air inlet Panel Catechin air filter (With deodorizer) to Breaker Power supply cord Remote control receiving section Air outlet Vertical vanes Fan Horizontal vane Remote controller Operation section (When the front panel is opened) Display section Operation indicator lamp Emergency operation switch Remote control receiving section 3 MSC-A07YV- E1 MSC-A09YV- E1 MSC-A12YV- E1 ACCESSORIES 1 Installation plate 2 Installation plate fixing screw 4 o 25 mm 3 Remote controller holder 4 Fixing screw for 3 3.5 o 16 mm 5 Battery (AAA) for remote controller 6 Wireless remote controller 7 Felt tape (Used for left or left-rear piping) 8 Air cleaning filter 1 5 1 2 2 1 1 1 REMOTE CONTROLLER Signal transmitting section Operation display section OPERATE /STOP (ON /OFF)button AM PM TOO ON/OFF WARM TOO COOL TEMPERATURE buttons Open the front lid. Indication of remote controller model is on back. CLOCK PM AM TOO ON/OFF WARM TOO COOL FAN SPEED CONTROL button I FEEL COOL HEAT /FAN FAN VANE DRY STOP START HR. MIN. / MODE OPERATION SELECT button ECONO COOL ECONO COOL button RESET button RESET CLOCK OFF-TIMER button ON-TIMER button HR. button MIN. button (TIME SET button) CLOCK SET button VANE CONTROL button 4 3 SPECIFICATION Indoor model Function Indoor unit power supply MSC-A09YV - E1 MSC-A12YV - E1 MSC-A07YV - E1 Heating Heating Cooling Heating Cooling Cooling Single phase Single phase Single phase 230V,50Hz 230V,50Hz 230V,50Hz 474/372 w/276 w 510/420 w /342w 474/384 w/306w 588/456 w/342w 582/444 w/324w 606/498 w/396w 10 10 10 0.17 0.17 0.19 35 35 40 90 90 92 0.17 0.17 0.19 RC4V19-LA RC4V19-LA RC4V19-KA WHT-BLK 413 WHT-BLK 413 WHT-BLK 316 BLK-RED 334 BLK-RED 334 BLK-RED 299 815O278O244 815O278O244 815O278O244 9 9 10 5 5 5 36/31w /25 w 36/31 w /25 w 36/31w /25 w 39/32w/25 w 40/33w/26 w 39/33w/26 w 900/750w/600 w 950/820 w /700 w 900/770w/650w 1,050/870w/700w 930/760w/600w 960/830w/700 w 3 3 3 10 10 10 10 10 10 KP1A or KG3A KP1A or KG3A KP1A or KG3A Capacity Air flow(High/Med.w/Low w) Power outlet Running current Power input Power factor Fan motor current Model Winding resistance(at 20:) Dimensions WOHOD Weight Air direction Sound level(High/Med.w/Loww ) Fan speed(High/Med.w/Loww ) Fan speed regulator Thermistor RT11(at 25:) Thermistor RT12(at 25:) Remote controller model Fan motor Electrical data Special remarks K /h A A W % A " mm kg dB rpm k" k" NOTE: 1. Test conditions are based on ISO 5151. Cooling : Indoor DB27°C WB19°C Heating : Indoor DB20°C Outdoor DB35°C WB24°C OutdoorDB 7°C/WB 6°C Indoor-Outdoor piping length 5m 2.Remote controller model KP1A and KG3A are the same in terms of specification. W Reference value 5 4 NOISE CRITERIA CURVES E1 FAN SPEED FUNCTION High COOL HEAT SPL(dB(A)) 36 LINE MSC-A07YV- MSC-A09YV- E1 FAN SPEED FUNCTION High COOL HEAT SPL(dB(A)) 36 39 LINE Test conditions, Cooling : DB27: Heating : DB20: 90 WB19: WB -: 90 Test conditions. Cooling : DB27: Heating : DB20: WB19: WB -: OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR 70 NC-70 OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR 80 80 70 NC-70 60 NC-60 60 NC-60 50 NC-50 50 NC-50 40 NC-40 40 NC-40 30 NC-30 30 NC-30 20 APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE 20 NC-20 APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC-20 10 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz 10 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz MSC-A12YV- E1 FAN SPEED FUNCTION High COOL HEAT SPL(dB(A)) 40 39 LINE Test conditions, Cooling : DB27: 90 WB19: OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR 80 70 NC-70 60 NC-60 50 NC-50 40 NC-40 INDOORUNIT WALL 1m NC-30 30 0.8m 20 APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC-20 10 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz MICROPHONE 6 5 OUTLINES AND DIMENSIONS Unit: mm INDOOR UNIT Installation plate 231.5 2.5 41 81.5 326 326 81.5 242 7 or more 5 Air in Indoor unit 783 42 Wall hole [65 815 Installation plate 278 { 90 110 244 Liquid line [6.35-0.5m Gas line [9.52-0.43m Insulation [37 O.D [21 I.D Drain hose [16 (Connected part O,D) Insulation [28 58 162 19 Power supply cord Lead to right 1.0m Lead to left 0.3m Air out Wireless remote controller MSC-A12YV - E1 INDOOR UNIT Installation plate 218.5 41 2.5 326 326 81.5 242 7 or more 5 Installation plate Air in 783 Indoor unit 81.5 Wall hole [65 815 278 { 90 110 244 Liquid line [6.35-0.5m Gas line [9.52-0.43m Insulation [37 O.D [21 I.D 30 60 606 149 58 162 19 Power supply cord Lead to right 1.0m Lead to left 0.3m Air out Drain hose [16 (Connected part O,D) Insulation [28 Wireless remote controller 7 42 258 17.5 161.5 30 60 606 149 161.5 271 4.5 MSC-A07YV - E1 MSC-A09YV - E1 81.5 133.5 6 WIRING DIAGRAM MSC-A09YV - E1 MSC-A12YV - E1 MODELS WIRING DIAGRAM BRN RED BLU WHT BLK CN LD103 151 MSC-A07YV - E1 INDOOR UNIT TO OUTDOOR TB UNIT L CONNECTING BRN FOR 3 MUH OR MXZ TYPE N 12V FOR MU OR MUX TYPE 12V POWER SUPPLY CORD ~/N 230V 50Hz 2 1 BLU TAB12 CN201 3 2 1 CN202 2 1 CN 101 CN 112 RT12 RT11 3 BLK GRY YLW BRN WHT RED T11 NR11 CN 111 CN 121 C11 F11 SR141 1 3 5 1 2 3 MF 4 5 6 CN211 ELECTRONIC CONTROL P.C. BOARD GRN 5 5 POWER MONITOR, RECEIVER P.C.BOARD REMOTE CONTROLLER GRN/YLW PE MV CIRCUIT BREAKER SYMBOL C11 F11 MF MV NAME SYMBOL NR11 RT11 RT12 SR141 VARISTOR NAME ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR SOLID STATE RELAY SYMBOL TB T11 NAME TERMINAL BLOCK TRANSFORMER INDOOR FAN CAPACITOR FUSE(3.15A) INDOOR FAN MOTOR (INNER FUSE) VANE MOTOR NOTE:1. About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram for servicing. 2. Use copper conductors only. (For field wiring) 3. Symbols below indicate. /: Terminal block, : Connector 7 REFRIGERANT SYSTEM DIAGRAM MSC-A09YV - E1 Refrigerant pipe [9.52 (with heat insulator) MSC-A07YV - E1 INDOOR UNIT MSC-A12YV - E1 INDOOR UNIT Unit:mm Refrigerant pipe [12.7 (with heat insulator) Indoor heat exchanger Indoor coil thermistor RT12 Flared connection Indoor heat exchanger Indoor coil thermistor RT12 Flared connection Room temperature thermistor RT11 Room temperature thermistor RT11 Flared connection Flared connection Refrigerant flow in cooling Refrigerant pipe [6.35 (with heat insulator) 8 Refrigerant flow in cooling Refrigerant pipe [6.35 (with heat insulator) 8 MICROPROCESSOR CONTROL MSC-A07YV - E1 MSC-A09YV - E1 MSC-A12YV - E1 Once the operation mode are set, the same operation mode can be repeated by simply turning the OPERATE/STOP (ON/OFF) button ON. Indoor unit receives the signal with a beep tone. When the system turns off, 3-minute time delay will operate to protect system from overload and compressor will not restart for 3 minutes. WIRELESS REMOTE CONTROLLER Signal transmitting section INDOOR UNIT DISPLAY SECTION Operation Indicator lamp The operation indicator at the right side of the indoor unit indicates the operation state. Operation display section OPERATE /STOP (ON /OFF)button AM PM · The following indication does not depend on the shape of lamp. TOO ON/OFF WARM TOO COOL Operation Indicator TEMPERATURE buttons lighted not lighted Open the front lid. Indication Operation state Difference between target temperature and room temperature CLOCK PM AM TOO ON/OFF WARM TOO COOL FAN SPEED CONTROL button I FEEL COOL HEAT /FAN FAN VANE DRY STOP START HR. MIN. / MODE OPERATION SELECT button ECONO COOL ECONO COOL button RESET button RESET CLOCK OFF-TIMER button ON-TIMER button HR. button MIN. button (TIME SET button) CLOCK SET button VANE CONTROL button This shows that the air conditioner is operating to reach the target temperature. Please wait until the target temperature is obtained. This shows that the room temperature is approaching the target temperature. Approx. 2 : or more Approx. 2 : or less 8-1. COOL ( ) OPERATION (1) Press OPERATE/STOP(ON/OFF) button. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone. (2) Select COOL mode with the OPERATION SELECT button. (3) Press TEMPERATURE buttons (TOO WARM or TOO COOL button)to select the desired temperature. The setting range is 16 ~ 31°C Difference between room temperature and set tem1. Thermostat control perature during operation Thermostat is ON or OFF by difference between room temperature and set temperature Initial temperature difference Thermostat Room temperature minus set temperature : 0.3 : or more················································ON Room temperature minus set temperature : less than -0.3 :············································OFF Set temperature -0.3 : 0.3 : 2. Indoor fan speed control Indoor fan operates continuously at the set speed by FAN SPEED CONTROL button regardless of thermostat's OFF-ON. Difference between room In Auto the fan speed is as follows. temperature and set temFan speed Initial temperature difference perature during operation Room temperature minus set temperature : 1.7 degrees or more·······························High Room temperature minus set temperature : Between 1 and 1.7 degrees···················Med. 3 deg. Room temperature minus set temperature : less than 1 degree··································Low 1 deg. 1.7 deg. 9 3. Coil frost prevention x Temperature control When the indoor coil thermistor RT12 reads 4°C or below(MSC-A07/A09YV) / 0°C or below(MSC-A12YV) for 5 minutes, the coil frost prevention mode starts. The indoor fan operates at the set speed and the compressor stops for 5 minutes. After that, if RT12 still reads below 4°C (MSC-A07/A09YV) / 0°C (MSC-A12YV), this mode is prolonged until the RT12 reads over 4°C (MSC-A07/A09YV) / 0°C (MSC-A12YV). y Time control When the three conditions as follows have been satisfied for 1 hour and 45 minutes, the compressor stops for 3 minutes. The indoor fan operates at the set speed. a. Compressor has been continuously operating. b. Indoor fan speed is Low or Med. c. Room temperature is below 26°C. When compressor stops, the accumulated time is cancelled. When compressor restarts, time counting starts from the beginning. Time counting also stops temporarily when the indoor fan speed becomes High or the room temperature exceeds 26°C. However, when two of the above conditions (b.and c.) are satisfied again, time accumulation is resumed. Operation chart Example ON Compressor Outdoor fan OFF OFF ON Indoor fan ON ( continuously at set speed) Set temperature and : initial room temperature in dry mode 35 30 Set temper ...