Table of Contents
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SPECIFICATIONS..............................................................................................................................................2
EXTERNAL DIMENSIONS.................................................................................................................................3
WIRING DIAGRAMS..........................................................................................................................................4
ELECTRICAL PARTS........................................................................................................................................5
MICROCOMPUTER CONTROL SYSTEM.........................................................................................................6
PRINTED WIRING DIAGRAM............................................................................................................................7
FUNTIONS..........................................................................................................................................................8
TROUBLESHOOTING......................................................................................................................................12
REFRIGERATION CYCLE AND PERFORMANCE CURVES..........................................................................15
DISASSEMBLING PROCEDURE.....................................................................................................................17
REPLACEMENT PARTS LIST..........................................................................................................................27
SERVICE MANUAL
ROOM AIR CONDITIONER
INDOOR UNIT
AH-MP20
OUTDOOR UNIT
AU-MP20
CONTENTS
SHARP CORPORATION
1
SPLIT SYSTEM
Page
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Summary of Contents for Sharp AH-MP20
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Page 1: Table Of Contents
SERVICE MANUAL SPLIT SYSTEM ROOM AIR CONDITIONER INDOOR UNIT AH-MP20 OUTDOOR UNIT AU-MP20 CONTENTS Page SPECIFICATIONS..............................2 EXTERNAL DIMENSIONS..........................3 WIRING DIAGRAMS............................4 ELECTRICAL PARTS............................5 MICROCOMPUTER CONTROL SYSTEM......................6 PRINTED WIRING DIAGRAM..........................7 FUNTIONS................................8 TROUBLESHOOTING............................12 REFRIGERATION CYCLE AND PERFORMANCE CURVES................15 DISASSEMBLING PROCEDURE........................17 REPLACEMENT PARTS LIST..........................27... -
Page 2: Specifications
CHAPTER 1. PRODUCT SPECIFICATION [1] SPECIFICATION 1. AH-MP20 / AU-MP20 INDOOR UNIT OUTDOOR UNIT ITEMS AH-MP20 AU-MP20 Cooling capacity 5.30 Moisture removal Liters/h – Electrical data Phase Single Rated frequency Rated voltage Rated current Rated input * 1720 Power factor... -
Page 3: External Dimensions
[2] EXTERNAL DIMENSION 1. Indoor unit (AH-MP20) 2. Outdoor unit (AU-MP20) -
Page 4: Wiring Diagrams
[3] WIRING DIAGRAM Indoor Unit (AH-MP20) 450v CC064 Outdoor Unit (AU-MP20) UNIT TO UNIT CORD CC097... -
Page 5: Electrical Parts
CHAPTER 2. ELECTRIC CIRCUIT [1] ELECTRIC PARTS 1. INDOOR UNIT (AH-MP20) PART NO. PART NAME ITEM SPECIFICATION Terminal Board Rating 300V,25A Fan motor Capacitor Rating 450V, 2 µ Relay-1 Rating AC250V,20A (RY1) Coil Volt: 12V Printed Wiring Board Material Paper Base Phenolic Resin (UL 94V-0) -
Page 6: Microcomputer Control System
[2] MICRO-COMPUTER CONTROL SYSTEM 1. Electronic Control Diagram Indoor unit (AH-MP20) -
Page 7: Printed Wiring Diagram
2. PRINTED WIRING DIAGRAM 1 Indoor (AH-MP20) -
Page 8: Funtions
Fan speeds are given by the indoor fan motor, "DL"~"HH" which are available in the following operation mode. 2. OPERATION MODES 2.1. COOL operation AH-MP20 Fan switch Fan switch The compressor turns on or off, at the thermostat lines C3 and C4. (r.p.m) - Page 9 4. TEST OUTPUTS IN EACH OPERATION MODE If the "AUX" button on the unit is pressed for 5 seconds or more during operation, cool test operation starts. The operation LED (red) flickers Outdoor Indoor Mode Valve Coil Compressor during test run. Fan Motor Fan Motor Cooling...
- Page 10 [2] TEST MODE Keep pushing the "AUX." buttons and supply the power, the system will go to the test mode. In this mode, the output of operation is switched by pushing the ""AUX." button in the unit or the "OI" button in the remote controller. Normal outputs are shown in Table. 2.1 PLASMA CLUSTER Plasma cluster ion mode SSR2 : ON...
- Page 11 [3] DIAGNOSIS PROCEDURE When indoor fan motor is out of order or compressor lock occurs, indoor fan motor, outdoor fan motor, and louver are all stopped and the operation LED(red) turns on or off synchronously with the timimg of the timer LED. When the thermistor for room temperature or pipe temperature is open or short state, the operation LED turns on or off synchrnoously with the timing of the timer LED by pushing continously for more than 5 seconds "AUX."...
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Page 12: Troubleshooting
CHAPTER 4. TROUBLESHOOTING... -
Page 15: Refrigeration Cycle And Performance Curves
CHAPTER 5. REFRIGERANTION CYCLE AND PERFORMANCE CURVES [1] REFRIGERANT CYCLE Capillary tube... - Page 16 [2] PERFORMANCE CURVES 1 – 14...
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Page 17: Disassembling Procedure
MODEL: AH-MP20 [1] INDOOR UNIT 1. Disassembling procedure of the indoor unit 1) Open the open panel, remove 2 Air Filters. 4) Remove the screw fixing the Cord holder. 2) Open the Louver frame, unlooks the hooks, pull the unit. - Page 18 7) Remove a screw fixing the Control box cover. 10) Remove the Thermistor of the Evaporator. 11) Remove Connector. 8) Cut the fixing band and remove the Cover B. 12) Cut the fixing band and remove the Holder. 9) Remove a screw fixing the ground wire.
- Page 19 13) Remove 2 screws fixing the Control box and remove it. 16) Remove 3 screws fixing the Evaporator. 17) Remove the Evaporator from the Cabinet. 14) Remove a screw fixing the drain pan and pull Drain pan toward you. 18) Remove 4 screws fixing the Side cover R, and pull the - Cross flow fan 19) Loose a screw fixing Cross flow fan.
- Page 20 2. The Electric Control box. 1) Remove the screw fixing the Receiving filter. 4) Remove a screw fixing the Cord holder and 2 screw fixing the Terminal board. 2) Remove the 2 Switch and Photo detector unit. 5) Remove 2 screws fixing the Transformer and pull the Control board unit.
- Page 21 3. The Drain pan and related. 1) Remove the screw fixing the Drain pan on both side. 2) Turn left the Drain hose.
- Page 22 4. The Louver frame unit and related 1) Remove the screw fixing the frame guide on both side 3) Remove the connector of louver motor and take off the and take off the louver unit. wire and holder. 4) Put the one of the vertical louver. 2) Remove 2 screws fixing cover-l and cover-r and take off them.
- Page 23 5. How to remove the display cover 1) Put the center of the front panel under the display cover. 2) Side it to one side. 6. How to remove the hi voltage unit. 1) Remove 2 screws fixing holder. 2) Take off the high voltage unit ass'y from the holder. 3) Remove the connector of high voltage unit ass'y.
- Page 24 MODEL: AU-MP20 [2] OUTDOOR UNIT 1. Disassembling procedure of the control box 1) Loose 3 screws fixing the control cover. 5) Loose 1 screw fixing the cabinet (rear side). 2) Loose 1 screw fixing the side cover. 6) Loose 3 screw fixing the cabinet (right side). 3) Loose 8 screws fixing the side cover R.
- Page 25 9) Loose 1 screw fixing the rear cabinet (left side). 12) Remove the terminal cover. 10) Cut nylon band. 13) Remove 3 terminal. 11) Loose 1 screw fixing the control box. 14) Loose 3 screws fixing the bulkhead.
- Page 26 2. Disassembling procedure of the fan 1) Loose the fan nut and fan can take out. 2) Loose 2 screw fixing the fan motor angle. 3) Cut the nylon band and loose 4 screws fixing the fan motor...