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Sharp AH-N45DP2 Service Manual

Split system room air conditioners, indoor / outdoor units
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SPECIFICATIONS ............................................................................................................................................. 2
EXTERNAL DIMENSIONS ............................................................................................................................... 3
WIRING DIAGRAMS ......................................................................................................................................... 4
ELECTRICAL PARTS ....................................................................................................................................... 5
MICROCOMPUTER CONTROL SYSTEM ....................................................................................................... 6
FUNCTIONS ................................................................................................................................................... 10
TROUBLESHOOTING GUIDE OF CONTROL CIRCUIT ................................................................................ 16
REFRIGERATION CYCLE .............................................................................................................................. 20
PERFORMANCE CURVES ............................................................................................................................ 21
REFRIGERANT PIPE INSTALLATION WORKS ............................................................................................. 21
DISASSEMBLING PROCEDURE ................................................................................................................... 22
REPLACEMENT PARTS LIST ........................................................................................................................31
SERVICE MANUAL
INDOOR UNIT
AH-N45DP2
AH-N56DP2
MODELS
OUTDOOR UNIT
AU-N45DP2
AU-N56DP2
In the interests of user-safety (Required by safety regulations in some
countries) the set should be restored to its original condition and only
parts identical to those specified should be used.

TABLE OF CONTENTS

SHARP CORPORATION
1
SPLIT SYSTEM
ROOM AIR CONDITIONERS
AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
S3314AHN56DP2
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  Summary of Contents for Sharp AH-N45DP2

  • Page 1: Table Of Contents

    AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 SERVICE MANUAL S3314AHN56DP2 SPLIT SYSTEM ROOM AIR CONDITIONERS INDOOR UNIT AH-N45DP2 AH-N56DP2 MODELS OUTDOOR UNIT AU-N45DP2 AU-N56DP2 In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.
  • Page 2: Specifications

    AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 SPECIFICATIONS ITEMS INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 Cooling capacity Moisture removal Liters/h Electrical data Phase – Single Rated frequency Rated voltage Rated current Cool 10.7 Rated input Cool 1.82 2.29...
  • Page 3: External Dimensions

    AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 EXTERNAL DIMENSIONS 1040 1600 18.5 Power supply cord INVERTER AIR CONDITIONER MODE TEMP. TIMER TEMP. [Length unit : mm] Remote controller Figure E-1. INDOOR UNIT 46.3 ø4.5 10.5 Figure E-2. OUTDOOR UNIT...
  • Page 4: Wiring Diagrams

    回轉數 馬達 檢出信号 400或430V 端子板 緑-黄 紅 黒 藍 離子簇 内部 産生器 温度 蒸發器 注意! 控制器 高厭電 風扇馬達 Figure W-1. Wiring Diagram for AH-N45DP2 黒 紅 藍 内部過載継電器 機組間配線 緑-黄 内部温度控制器 端子板 電源 風扇馬達 厭縮機 單相 控制接地 黒 紅 藍...
  • Page 5 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 室内機 室外機 指示基板2 250V 2.5或3A 内部清洗按鈕2 指示基板3 保險絲 茶 受信基板 紅 指示 電源變厭器 基板1 藍 内部清洗按鈕1 控 機 制 端子板 端子板 組 熱交用 基 間 茶 恒温器 板 内部温度控制器 配 線 室温用 電源 恒温器 風扇馬達 單相...
  • Page 6: Electrical Parts

    AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 ELECTRICAL PARTS Part Part Name Items Specifications AH-N45DP2 AH-N56DP2 Terminal Board Rating 300V 25A Fan motor Rating 400V or 430V 2µF Capacitor Relay Rating RY1 AC250V 20A RY4 AC250V 5A Coil Volt.; 12V Coil Volt.; 12V...
  • Page 7: Microcomputer Control System

    AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 MICROCOMPUTER CONTROL SYSTEM...
  • Page 8 CLUSTER GENERATOR FROM FAN MOTOR FB441 FB441 FB441 FB441 TO TERMINAL BOARD TOP“N” BCN101(BCN201) FROM TERMINAL BOARD TOP“1”“BLACK” FROM FAN MOTOR FROM THERMISTOR FROM CLUSTER GENERATOR FROM CLEANING SWITCH 1 FROM LOUVER MOTOR igure L-2. Printed Wiring Diagram for AH-N45DP2...
  • Page 9 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2...
  • Page 10 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 TO TERMINAL BOARD TO TERMINAL BOARD BOTTOM“N” TOP“N” TO TERMINAL BOARD BOTTOM “L” FROM CLEANING SWITCH 2 TO TERMINAL BOARD TOP “2” FROM CLUSTER GENERATOR FROM FAN MOTOR FB441 FB441 FB441 FB441 TO TERMINAL BOARD TOP“N”...
  • Page 11 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 Microcomputer (IC1) IC1 is a CMOS, one chip, 8-bit microcomputer. Microcomputer port allocation is as follows. Pin Terminal Input Pin Terminal Input No. Name Output Function No. Name Output Function – 33 P20 CLEANING SW1 HOOT KEEP...
  • Page 12: Functions

    AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 FUNCTIONS Operation modes Temperature control characteristic COOL operation COOL operation The compressor turns on or off, at the thermostat In the “COOL” mode, the thermostat circuit is lines C4 and C5. The outdoor fan motor is also controlled by four thermostat lines (C1 thru C5).
  • Page 13 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 Table H-1 ONE-HOUR TIMER When ONE-HOUR timer is set, the unit turns off automatically after one hour. The one hour timer Compressor Fan speed operation has priority over other time operation, such as the TIMER ON and TIMER OFF. If the Cooling zone "DH"...
  • Page 14 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 Outputs in each operation mode Table H-4 Compressor Outdoor Indoor Valve Mode Fan Motor Fan Motor Coil Cooling Circulating Cooling L/UL UL/D Dehumidiflying D/OFF Circulating Power on start If the connecting wire JP5 is shorten on the PWB...
  • Page 15 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 Table H-6...
  • Page 16: Troubleshooting Guide Of Control Circuit

    AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 TROUBLESHOOTING GUIDE OF CONTROL CIRCUIT The machine does not function at all with remote controller and switch on the indoor unit. Check the cleaning switch 2(1),CN9, CN8 and lead wires. Replace the cleaning switch 2(1). (or reset connector)
  • Page 17 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 The machine does not function with remote controller Push button " " on the wireless remote controller. Is transmitting Are batteries of the indicator of the remote wireless remote controller controller active ? proper ? Replace the batteries with new ones.
  • Page 18 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 The room is not cooled at all or not cooled. The compressor does not operate. Fig. 1 Temperature properties of indoor thermistors Room temperature Heat exchange thermistor TH1 thermistor TH2 Thermistor Color Connector Push the button "AUX." on...
  • Page 19 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 For AH-N56DP2 / AU-N56DP2 The room is not cooled at all or not cooled. The compressor does not operate. Push the button " AUX." on the indoor unit, for more than 5 sec. Using a tester, measure voltage at the terminals on the terminal board.
  • Page 20: Refrigeration Cycle

    Outdoor unit Capillary tube Compressor Condenser Accumulator Figure R-1. Refrigeration Cycle for AH-N45DP2 / AH-N56DP2 Cycle temperature and service port pressure Based on 'ISO 5151 : 1994(E), condition T1' (at 220V refrigerant pipes length 7.5m) Model AH-N45DP2 AH-N56DP2 Cooling Cooling NO.
  • Page 21: Performance Curves

    3 0 3 1 3 2 3 3 3 4 3 5 3 6 3 7 3 8 3 9 4 0 Outside air temp.(˚C) Outside air temp.(˚C) Figure P-1. At Cooling for AH-N45DP2 Figure P-2. At Cooling for AH-N56DP2 REFRIGERANT PIPE INSTALLATION WORKS Refrigerant pipe length and level difference between the indoor and outdoor units.
  • Page 22: Disassembling Procedure

    AU-N45DP2 AH-N56DP2 AU-N56DP2 DISASSEMBLING PROCEDURE FOR INDOOR UNIT MODEL [AH-N45DP2 / AH-N56DP2] CAUTION:DISCONNECT THE UNIT FROM THE POWER SUPPLY BEFORE ANY SERVICING Open the Opne panel, remove 2 Air Filters. Remove 6 screws fixing the Front panel. Open the Louver frame.unlook the hooks,and pull Remove the screw fixing the Cord holder.
  • Page 23 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 Close the Open panel. pushing the nail of the Remove a screw fixing the Control box cover. Front panel, and lift the Front panel up. Cut the fixing band and Remove the Cover B. Remove the unit-to-unit wiring from the Terminal board.
  • Page 24 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 Remove the Thermistor of the Evaporator. Cut the fixing band and Remove the Holder. Remove 2 screws fixing the Control box and Remove Connectors. remove it.
  • Page 25 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 Remove the Evaporator from the Cabinet. Remove a screw fixing the drain pan and pull Drain pan toward you. Remove 4 screws fixing the Side cover R, and pull up the Cross flow fan. Remove the Drain cover from the Evaporator.
  • Page 26 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 The Electric Control box. Remove a screw fixing the Cord holder and 2 screws fixing the Terminal board. Remove the screw fixing the Receiving filter. Remove 2 screws fixing the Transformer and pull Remove the 2 Switch and Photo detector unit.
  • Page 27 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 The LOUVER FRAME UNIT and related The DRAIN PAN and related Remove the screw fixing the FRAME GUIDE on Remove the screw fixing the Drain pan on both both side and take off the LOUVER UNIT.
  • Page 28 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 How to remove the Hi Voltage UNIT. Remove the connector of Louver motor and take off the Wire and Holder. Remove 2 screws fixing Holder. Push the one of the Vertical louver. Take off the HIGH VOLTAGE UNIT ASS’Y from How to remove the DISPLY COVER.
  • Page 29 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 FOR OUTDOOR UNIT MODEL AU-N45DP2 / AU-N56DP2 DISASSEMBLING PROCEDURE OF THE CONTROL BOX Loose 1 screw fixing the cabinet (rear side). Loose 3 screws fixing the control cover. Loose 1 screw fixing the side cover. Loose 3 screw fixing the cabinet (right side).
  • Page 30 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 Loose 1 screw fixing the rear cabinet (left side). Remove 3 terminals. Loose 3 screws fixing the bulkhead. Cut nylon band. DISASSEMBLING PROCEDURE OF THE FAN Loose the fan nut and fan can take out. Loose 1 screw fixing the control box.
  • Page 31: Replacement Parts List

    AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 REPLACEMENT PARTS LIST [AH-N45DP2 / AH-N56DP2] REF. NO. PART NO. DESCRIPTION Q'TY CODE CABINET AND UNIT PARTS 1- 1 CMOT-A415JBKZ Fan moter sub assembly 1- 3 GWAK-A270JBFA Front panel 1- 4 CHLD-A067JBK0 Bearing assembly 1- 5...
  • Page 32 Tube assembly [AH-N45DP2] 3- 1 CPIPCA729JBKZ Tube assembly [AH-N56DP2] 3- 2 PSEN-A042JBKZ Flare nut assembly (1/4") 3- 3 PSEN-A043JBKZ Flare nut assembly (3/8") [AH-N45DP2] 3- 3 PSEN-A048JBKZ Flare nut assembly (1/2") [AH-N56DP2] 3- 4 PVLV-A222JBEZ Flare union (1/4") 3- 5 PVLV-A223JBEZ Flare union (3/8") [AH-N45DP2]...
  • Page 33 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 INDOOR UNIT AH-N45DP2 / AH-N56DP2 4-10 4-11 1-28 4-12 1-31 1-36 1-42 1-30 1-31 1-31 1-26 1-42 1-31 1-18 1-37 1-38 2-13 2-12 2-28 2-17 2-16 1-41 1-29 2-15 2-20 2-10 1-40 2-14 1-39 2-19 1-33...
  • Page 34 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 REPLACEMENT PARTS LIST [AU-N45DP2 / AU-N56DP2] REF. NO. PART NO. DESCRIPTION Q'TY CODE CABINET AND UNIT PARTS 1- 1 LSUB-A024JBPZ Motor angle sub 1- 2 CMOTLB027JBEZ Fan motor [AU-N45DP2] 1- 2 CMOTLB028JBEZ Fan motor [AU-N56DP2] 1- 3...
  • Page 35 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 REF. NO. PART NO. DESCRIPTION Q'TY CODE SCREWS, NUT AND BOLT 6- 1 LX-BZA072JBE0 Special screw 6- 2 LX-NZ0128JBE0 Special nut 6- 3 LX-BZA140JBE0 Special screw 6- 4 LX-BZA292JBE0 Special screw 6- 5 LX-BZA166JBE0 Special screw...
  • Page 36 AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2 OUTDOOR UNIT AU-N45DP2 / AU-N56DP2 2-10 1-14 1-23 1-20 1-30 1-24 1-22 2-1 6-8 3-11 1-11 6-10 1-19 1-12 1-27 3-12 1-18 3-15 1-21 3-13 1-10 1-28 1-16 1-26 3-14 1-25 1-13 3-10 1-15 1-29 i d e...

This manual is also suitable for:

Ah-n56dp2Au-n45dp2Au-n56dp2