Page 1: Technical Data
854 017 08 UH2442 854 017 19 UH3642 854 017 20 Indoor Unit XH2442 XH3642 XH4242 UH2442 UH3642 85464849182000 KH2442 / CH2442 KH3642 / CH3642 UH2442 / CH2442 UH3642 / CH3642 OUTDOOR MODEL No. CH2442 CH3642 CH4242 TH2442 TH3642 TH4242 KH2442 KH3642 FILE NO.
Page 2: Please Read Before Starting
Important Please Read Before Starting This air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the system so it operates safely and efficiently. For safe installation and trouble-free operation, you must : Carefully read this instruction booklet before beginning.
Page 3: Table Of Contents
WHO SHOULD USE THIS MANUAL This service manual is made to assist the service technician apply his knowledge and training to this model air conditioner. This manual is written both for experienced service persons and those who are new to air conditioning service. To help those with less experience or who are new to this kind of unit we have included more explanations of basic procedures in simple language than is usual in some service manuals.
Page 4 Overload Protection (Heating) ... II - 9 Discharge Temperature Control (Cooling and Heating) ... II - 10 Auto. Mode for Automatic Heating/Cooling Switching ... II - 11 2-10 Defrosting Control, Outdoor Heat Exchanger Coil (Heating) ... II - 13 2-11 4-Way Valve, Solenoid Control ...II - 14 2-12 Automatic Restart after Power Interruption ...
Page 5 1. SPECIFICATIONS Unit Specifications ... I - 4-Way Air Discharge Semi-concealed Type ... I - Ceiling Mounted Type ... I - Concealed Duct Type ... I - Wall-Mounted Type... I - 10 Major Component Specifications ... I - 12 (A) Indoor Units ... I - 12 (B) Outdoor Units ...
Page 6: Specifications
1-1 Unit Specifications MODEL No. POWER SOURCE PERFORMANCE Capacity* Moisture removal (High) Air circulation (H / M / L) S.E.E.R. (H.S.P.F.) ELECTRICAL RATINGS Voltage rating Available voltage range Running amperes Power input* Maximum overcurrent protection FEATURES Controls Low ambient control Fan speeds Indoor / Outdoor Optional Wired Remote Controller (Timer) Optional Wireless Remote Controller (Timer)
Page 7: Unit Specifications
1-1 Unit Specifications MODEL No. POWER SOURCE PERFORMANCE Capacity* (17 F)** Moisture removal (High) Air circulation (H / M / L) 230 V S.E.E.R. (H.S.P.F.) ELECTRICAL RATINGS Voltage rating Available voltage range Running amperes Power input* (17 F)** Maximum overcurrent protection FEATURES Controls Low ambient control...
Page 8 1-1 Unit Specifications MODEL No. POWER SOURCE PERFORMANCE Capacity* Moisture removal (High) Air circulation (H / M / L) S.E.E.R. (H.S.P.F.) ELECTRICAL RATINGS Voltage rating Available voltage range Running amperes Power input* Maximum overcurrent protection FEATURES Controls Low ambient control Fan speeds Indoor / Outdoor Optional Wired Remote Controller (Timer) Optional Wireless Remote Controller (Timer)
Page 9 1-1 Unit Specifications MODEL No. POWER SOURCE PERFORMANCE Capacity* (17 F)** Moisture removal (High) Air circulation (H / M / L) 230 V S.E.E.R. (H.S.P.F.) ELECTRICAL RATINGS Voltage rating Available voltage range Running amperes Power input* (17 F)** Maximum overcurrent protection FEATURES Controls Low ambient control...
Page 10 1-1 Unit Specifications MODEL No. POWER SOURCE PERFORMANCE Capacity* Moisture removal (High) Air circulation (H / M / L) S.E.E.R. (H.S.P.F.) ELECTRICAL RATINGS Voltage rating Available voltage range Running amperes Power input* Maximum overcurrent protection FEATURES Controls Low ambient control Fan speeds Indoor / Outdoor Optional Wired Remote Controller (Timer) Optional Wireless Remote Controller (Timer)
Page 11 1-1 Unit Specifications MODEL No. POWER SOURCE PERFORMANCE Capacity* (17 F)** Moisture removal (High) Air circulation (H / M / L) 230 V S.E.E.R. (H.S.P.F.) ELECTRICAL RATINGS Voltage rating Available voltage range Running amperes Power input* (17 F)** Maximum overcurrent protection FEATURES Controls Low ambient control...
Page 12 1-1 Unit Specifications MODEL No. POWER SOURCE PERFORMANCE Capacity* Moisture removal (High) Air circulation (H / M / L) External Static Pressure S.E.E.R. (H.S.P.F.) ELECTRICAL RATINGS Voltage rating Available voltage range Running amperes Power input* Maximum overcurrent protection FEATURES Controls Low ambient control Fan speeds Indoor / Outdoor Optional Wired Remote Controller (Timer)
Page 13 1-1 Unit Specifications MODEL No. POWER SOURCE PERFORMANCE Capacity* (17 F)** Moisture removal (High) Air circulation (H / M / L) 230 V External Static Pressure S.E.E.R. (H.S.P.F.) ELECTRICAL RATINGS Voltage rating Available voltage range Running amperes Power input* (17 F)** Maximum overcurrent protection FEATURES Controls...
Page 14 1-1 Unit Specifications MODEL No. POWER SOURCE PERFORMANCE Capacity* Moisture removal (High) Air circulation (H / M / L) S.E.E.R. (H.S.P.F.) ELECTRICAL RATINGS Voltage rating Available voltage range Running amperes Power input* Maximum overcurrent protection FEATURES Controls Low ambient control Fan speeds Indoor / Outdoor Optional Wired Remote Controller (Timer) Optional Wireless Remote Controller (Timer)
Page 15 1-1 Unit Specifications MODEL No. POWER SOURCE PERFORMANCE Capacity* (17 F)** Moisture removal (High) Air circulation (H / M / L) 230 V S.E.E.R. (H.S.P.F.) ELECTRICAL RATINGS Voltage rating Available voltage range Running amperes Power input* (17 F)** Maximum overcurrent protection FEATURES Controls Low ambient control...
Page 16: Major Component Specifications
1-2 Major Component Specifications (A) Indoor Unit MODEL No. Source Remote controller (Option) Controller P. C. B Ass'y Control circuit fuse Fan (Number … diameter) Fan motor Model Source No. of pole … r.p.m. (230 V, High) Nominal output Coil resistance (Ambient temperature 68 F) Safety device Operating temperature...
Page 17: A) Indoor Units
1-2 Major Component Specifications (A) Indoor Unit MODEL No. Source Remote controller (Option) Controller P. C. B Ass'y Control circuit fuse Fan (Number … diameter) Fan motor Model Source No. of pole … r.p.m. (230 V, High) Nominal output Coil resistance (Ambient temperature 68 F) Safety device Operating temperature...
Page 18 1-2 Major Component Specifications (A) Indoor Unit MODEL No. Source Remote controller (Option) Controller P. C. B Ass'y Control circuit fuse Fan (Number … diameter) Fan motor Model Source No. of pole … r.p.m. (230 V, High) Nominal output Coil resistance (Ambient temperature 68 F) Safety device Operating temperature...
Page 19 1-2 Major Component Specifications (A) Indoor Unit MODEL No. Source Remote controller (Option) Controller P. C. B Ass'y Control circuit fuse Fan (Number … diameter) Fan motor Model Source No. of pole … r.p.m. (230 V, High) Nominal output Coil resistance (Ambient temperature 68 F) Safety device Operating temperature...
Page 20 1-2 Major Component Specifications (A) Indoor Unit MODEL No. Source Remote controller (Option) Controller P. C. B Ass'y Control circuit fuse Fan (Number … diameter) Fan motor Model Source No. of pole … r.p.m. (230 V, High) Nominal output Coil resistance (Ambient temperature 68 F) Safety device Operating temperature...
Page 21 1-2 Major Component Specifications (A) Indoor Unit MODEL No. Source Remote controller (Option) Controller P. C. B Ass'y Control circuit fuse Fan (Number … diameter) Fan motor Model Source No. of pole … r.p.m. (230 V, High) Nominal output Coil resistance (Ambient temperature 68 F) Safety device Operating temperature...
Page 22 1-2 Major Component Specifications (A) Indoor Unit MODEL No. Source Remote controller (Option) Controller P. C. B Ass'y Control circuit fuse Fan (Number … diameter) Fan motor Model Source No. of pole … r.p.m. (230 V, High) Nominal output Coil resistance (Ambient temperature 68 F) Safety device Operating temperature...
Page 23 1-2 Major Component Specifications (A) Indoor Unit MODEL No. Source Remote controller (Option) Controller P. C. B Ass'y Control circuit fuse Fan (Number … diameter) Fan motor Model Source No. of pole … r.p.m. (230 V, High) Nominal output Coil resistance (Ambient temperature 68 F) Safety device Operating temperature...
Page 24 1-2 Major Component Specifications (A) Indoor Unit MODEL No. Source Remote controller (Option) Controller P. C. B Ass'y Control circuit fuse Number ... Dia. and length Fan motor Model Source No. of pole … r.p.m. (230 V, High) Nominal output Coil resistance (Ambient temperature 68 F) Safety device...
Page 25 1-2 Major Component Specifications (A) Indoor Unit MODEL No. Source Remote controller (Option) Controller P. C. B Ass'y Control circuit fuse Switch Ass'y Number ... Dia. and length Fan motor Model Source No. of pole … r.p.m. (230 V, High) Nominal output Coil resistance (Ambient temperature 68 F)
Page 26: (B) Outdoor Units
1-2 Major Component Specifications (B) Outdoor Unit MODEL No. Source Controller P.C.B. Ass'y Control circuit fuse Compressor Model Source Nominal output Compressor oil Coil resistance (Ambient temperature 77 F) Safety device Overload relay models Operating temperature Operating ampere (at 77 F) Run capacitor Crank case heater Refrigerant amount charged at shipment...
Page 27 1-2 Major Component Specifications (B) Outdoor Unit MODEL No. Source Controller P.C.B. Ass'y Control circuit fuse Compressor Model Source Nominal output Compressor oil Coil resistance (Ambient temperature 77 F) Safety device Overload relay models Operating temperature Operating ampere (at 77 F) Run capacitor Crank case heater Refrigerant amount charged at shipment...
Page 28 1-2 Major Component Specifications (B) Outdoor Unit MODEL No. Source Compressor Model Source Nominal output Compressor oil Coil resistance (Ambient temperature 77 F) Safety device Overload relay models Operating temperature Operating ampere (at 77 F) Run capacitor Refrigerant amount charged at shipment High pressure switch Set pressure Number...diameter...
Page 29: Other Component Specifications
1-3 Other Component Specifications (A) Indoor Unit MODEL No. Power Transformer Rated Primary Secondary Capacity Coil resistance (Ambient temprature 77 F) Thermistor cut off temperature Thermistor (Coil sensor) : TH2, 3 Coil resistance Thermistor (Room sensor) : TH1 Coil resistance Drain pump Rated Float switch...
Page 30: Other Component Specifications
1-3 Other Component Specifications (A) Indoor Unit MODEL No. Power Transformer Rated Primary Secondary Capacity Coil resistance (Ambient temprature 77 F) Thermistor cut off temperature Thermistor (Coil sensor) : TH2, 3 Coil resistance Thermistor (Room sensor) : TH1 Coil resistance Drain pump Rated Float switch...
Page 31 1-3 Other Component Specifications (A) Indoor Unit MODEL No. Power Transformer Rated Primary Secondary Capacity Coil resistance (Ambient temprature 77 F) Thermistor cut off temperature Thermistor (Coil sensor) : TH2, 3 Coil resistance Thermistor (Room sensor) : TH1 Coil resistance Drain pump Rated Float switch...
Page 32 1-3 Other Component Specifications (A) Indoor Unit MODEL No. Power Transformer Rated Primary Secondary Capacity Coil resistance (Ambient temprature 77 F) Thermistor cut off temperature Thermistor (Coil sensor) Coil resistance Thermistor (Room or coil sensor) Coil resistance Electronic expansion valve Valve body Coil Synchronized Motor...
Page 33 1-3 Other Component Specifications (A) Indoor Unit MODEL No. Power Transformer Rated Primary Secondary Capacity Coil resistance (Ambient temprature 77 F) Thermistor cut off temperature Thermistor (Coil sensor) Coil resistance Thermistor (Room or coil sensor) Coil resistance Electronic expansion valve Valve body Coil Synchronized Motor...
Page 34 1-3 Other Component Specifications (A) Indoor Unit MODEL No. Power Transformer Rated Primary Secondary Capacity Coil resistance (Ambient temprature 77 F) Thermistor cut off temperature Thermistor (Coil sensor) Coil resistance Thermistor (Room or coil sensor) Coil resistance Electronic expansion valve Valve body Coil Synchronized Motor...
Page 35 1-3 Other Component Specifications (A) Indoor Unit MODEL No. Power Transformer Rated Primary Secondary Capacity Coil resistance (Ambient temprature 77 F) Thermistor cut off temperature Thermistor (Coil sensor) Coil resistance Thermistor (Room or coil sensor) Coil resistance Electronic expansion valve Valve body Coil UH2442...
Page 36 1-3 Other Component Specifications (A) Indoor Unit MODEL No. Power Transformer Rated Primary Secondary Capacity Coil resistance (Ambient temprature 77 F) Thermistor cut off temperature Thermistor (Coil sensor) Coil resistance Thermistor (Room or coil sensor) Coil resistance Electronic expansion valve Valve body Coil ATR –...
Page 37 1-3 Other Component Specifications (A) Indoor Unit MODEL No. Power Transformer Rated Primary Secondary Capacity Coil resistance (Ambient temprature 77 F) Thermistor cut off temperature Thermistor (Coil sensor) Coil resistance Thermistor (Room or coil sensor) Coil resistance Solenoid control valve or coil Solenoid control valve Solenoid coil Synchronized Motor...
Page 38 1-3 Other Component Specifications (A) Indoor Unit MODEL No. Power Transformer Rated Primary Secondary Capacity Coil resistance (Ambient temprature 77 F) Thermistor cut off temperature Thermistor (Coil sensor) Coil resistance Thermistor (Room or coil sensor) Coil resistance Electronic expansion valve Valve body Coil Switch Assy’s...
Page 39 1-3 Other Component Specifications (B) Outdoor Unit MODEL No. Compressor Motor Magnetic Contactor Coil rated Coil resistance (at 77 F) Contact rated (Main) Contact rated (Auxiliary) Power Relay Coil rated Coil resistance (at 77 F) Contact rated Power Transformer Rated Primary Secondary Capacity...
Page 40 1-3 Other Component Specifications (B) Outdoor Unit MODEL No. Compressor Motor Magnetic Contactor Coil rated Coil resistance (at 68 F) Contact rated (Main) Contact rated (Auxiliary) Power Relay Coil rated Coil resistance (at 77 F) Contact rated Power Transformer Rated Primary Secondary Capacity...
Page 41 1-3 Other Component Specifications (B) Outdoor Unit MODEL No. Compressor Motor Magnetic Contactor Coil rated Coil resistance (at 68 F) Contact rated (Main) Contact rated (Auxiliary) Power Relay Coil rated Coil resistance (at 77 F) Contact rated Power Transformer Rated Primary Secondary Capacity...
Page 42: Way Air Discharge Semi-Concealed Type
1-4 Dimensional data Indoor unit : 4-Way Air Discharge Semi-concealed Type 24 Type 32-9/32 (Ceiling opening) 29-13/16 (Suspention bolt pitch) Dimension : inch Air intake grille Air outlet Refrigerant liquid line (3/8" : XH12, 18. 1/4" : XH24) Refrigerant gas line (1/2"...
Page 43: Dimensional Data
1-4 Dimensional data Indoor unit : 4-Way Air Discharge Semi-concealed Type 36, 42 Type 4-7/8 4-7/8 32-9/32 (Ceiling opening) 29-13/16 (Suspention bolt pitch) Dimension : inch Air intake grille Air outlet Refrigerant liquid line (3/8") Refrigerant gas line (3/4") Drain connection Power supply entry (conduit size : 1/2") For discharge duct Suspention bolt mounting...
Page 44: Ceiling Mounted Type
1-4 Dimensional data Indoor unit : Ceiling Mounted Type 24 Type Air outlet 9-7/8 (Service space) Air intake 6-3/32 3-15/16 12-7/32 3-3/8 11-1/32 4-9/16 Holes in the rear side (View from front) 5-3/16 48-7/16 (Suspension bolt hole pitch) 50-13/32 or more 51-3/16 Front 3-1/2...
Page 45 1-4 Dimensional data Indoor unit : Ceiling Mounted Type 36, 42 Type 6-3/32 3-3/8 Air outlet or more 9-7/8 (Service space) Air intake 3-1/2 7-31/32 12-7/32 11-1/32 11-1/32 4-3/4 Holes in the rear side (View from front) 5-3/16 59-1/4 (Suspension bolt hole pitch) 61-7/32 Front (Service space)
Page 46: Concealed Duct Type
1-4 Dimensional data Indoor unit : Concealed Duct Type 24 Type 10-1/4 15/16 (Air outlet duct flange) 7-15/32 6-5/16 31/32 1-3/16 2-3/4 13/32 31/32 24-13/16 3-11/32 22-27/32 31/32 (Suspension bolt pitch) 7-9/32 I - 42 1. Specifications 4-17/32 Dimension : inch Refrigerant liquid line ø3/8 (narrow tube) (Use the tube connector) Refrigerant gas line ø5/8 (wide tube)
Page 47 1-4 Dimensional data Indoor unit : Concealed Duct Type 36 Type 13/32 31/32 10-1/4 15/16 (Air outlet duct flange) 7-15/32 6-5/16 31/32 1-3/16 2-3/4 24-13/16 3-11/32 4-17/32 22-27/32 31/32 Dimension : inch (Suspension bolt pitch) 7-9/32 I - 43 1. Specifications Refrigerant liquid line ø3/8 (narrow tube) Refrigerant gas line ø3/4 (wide tube) Upper drain port (O.D.
Page 48 1-4 Dimensional data Indoor unit : Concealed Duct Type Flange for the air intake duct (Field supply) : For Concealed Duct Type Thickness more than T1/16 inch 31/32 13/32 12, 18 type 27-15/32 26-1/16 24 type 39-9/32 36 type 58-3/16 56-25/32 8-9/32 10-1/4 (O.D.) 5/16...
Page 49: Wall-Mounted Type
1-4 Dimensional data Indoor unit : Wall Mounted Type 24 Type 4-5/32 49-7/32 Refrigerant gas line (wide tubing: ø 3/4) Refrigerant liquid line (narrow tubing: ø 1/4) Drain hose OD 1-1/4 Dimension : inch I - 45 1. Specifications 2-3/4 8-9/32 1911_X_S SM830082...
Page 50 1-4 Dimensional data Indoor unit : Wall Mounted Type 36 Type 2-9/16 59-1/16 Refrigerant gas line (wide tubing 3/4") Refrigerant liquid line (narrow tubing 3/8") Drain hose OD 1-1/4 Dimension : inch I - 46 1. Specifications 2-3/4 9-7/16 1912_X_S SM830082...
Page 51 1-4 Dimensional Data (B) Outdoor Unit: CH2442 6-11/16 1-31/32 1-31/32 4-21/64 Dimension : inch Hole for anchor bolt (4-ø1/2) Refrigerant tube joint (narrow tube) Flare connection 1/4 in (6.35 mm) Refrigerant tube joint (wide tube) Flare connection 3/4 in (19.05 mm) Refrigerant tubing inlet Power supply inlet I - 47...
Page 52: B) Outdoor Units
1-4 Dimensional Data (B) Outdoor Unit: CH3642, CH4242 6-11/16 1-31/32 4-21/64 1-31/32 I - 48 1. Specifications Dimension : inch Hole for anchor bolt (4-ø13) Refrigerant tube joint (narrow tube) Flare connection 3/8 in (9.52 mm) Refrigerant tube joint (wide tube) Flare connection 3/4 in (19.05 mm) Refrigerant tubing inlet Power supply inlet...
Page 53: Refrigerant Flow Diagram
1-5 Refrigerant Flow Diagram Outdoor Unit: CH2442 Compressor Accumulator Accumulator High pressure switch Heat exchanger Distributor Sub-heat exchanger Cooling Cycle Heating Cycle Outdoor Unit: CH3642 Compressor Accumulator Accumulator High pressure switch Heat exchanger Distributor Sub-heat exchanger Cooling Cycle Heating Cycle Indoor Unit: 24 Type Gas line service...
Page 54: Operating Range
1-5 Refrigerant Flow Diagram Outdoor Unit: CH4242 Compressor Accumulator High pressure switch Sub-heat exchanger Cooling Cycle Heating Cycle 1-6 Operating Range Cooling Heating Indoor Unit: 42 Type Gas line service valve O.D. 3/4" (19.05mm) Muffler 4-way valve Heat exchanger Distributor Liquid line service valve...
Page 55: Cooling Capacity
1-7 Cooling Capacity Indoor Unit: XH2442 Outdoor Unit: CH2442 • 230V / 1 phase / 60Hz RATING CAPACITY : 24,000 BTU/h EVAPORATOR ENT.TEMP. F( C) 72(22.2) 76(24.4) (15.0) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (17.2) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (19.4) 80(26.7) 84(28.9) 88(31.1)
Page 56: Cooling Capacity
Indoor Unit: XH2442 • 208V / 1 phase / 60Hz RATING CAPACITY : EVAPORATOR ENT.TEMP. F( C) 72(22.2) 76(24.4) (15.0) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (17.2) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (19.4) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (21.7) 80(26.7) 84(28.9) 88(31.1) 76(24.4) (23.9)
Page 57 Indoor Unit: XH3642 Outdoor Unit: CH3642 • 230V / 1 phase / 60Hz RATING CAPACITY : 34,500 BTU/h EVAPORATOR ENT.TEMP. F( C) 72(22.2) 76(24.4) (15.0) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (17.2) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (19.4) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (21.7)
Page 58 Indoor Unit: XH3642 • 208V / 1 phase / 60Hz RATING CAPACITY : EVAPORATOR ENT.TEMP. F( C) 72(22.2) 76(24.4) (15.0) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (17.2) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (19.4) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (21.7) 80(26.7) 84(28.9) 88(31.1) 76(24.4) (23.9)
Page 59 Indoor Unit: XH4242 Outdoor Unit: CH4242 • 230V / 1 phase / 60Hz RATING CAPACITY : 42,000 BTU/h EVAPORATOR ENT.TEMP. F( C) 72(22.2) 76(24.4) (15.0) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (17.2) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (19.4) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (21.7)
Page 60 Indoor Unit: XH4242 • 208V / 1 phase / 60Hz RATING CAPACITY : EVAPORATOR ENT.TEMP. F( C) 72(22.2) 76(24.4) (15.0) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (17.2) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (19.4) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (21.7) 80(26.7) 84(28.9) 88(31.1) 76(24.4) (23.9)
Page 61 Indoor Unit: TH2442 Outdoor Unit: CH2442 • 230V / 1 phase / 60Hz RATING CAPACITY : 22,400 BTU/h EVAPORATOR ENT.TEMP. F( C) 72(22.2) 76(24.4) (15.0) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (17.2) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (19.4) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (21.7)
Page 62 Indoor Unit: TH2442 • 208V / 1 phase / 60Hz RATING CAPACITY : EVAPORATOR ENT.TEMP. F( C) 72(22.2) 76(24.4) (15.0) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (17.2) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (19.4) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (21.7) 80(26.7) 84(28.9) 88(31.1) 76(24.4) (23.9)
Page 63 Indoor Unit: TH3642 Outdoor Unit: CH3642 • 230V / 1 phase / 60Hz RATING CAPACITY : 34,000 BTU/h EVAPORATOR ENT.TEMP. F( C) 72(22.2) 76(24.4) (15.0) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (17.2) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (19.4) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (21.7)
Page 64 Indoor Unit: TH3642 • 208V / 1 phase / 60Hz RATING CAPACITY : EVAPORATOR ENT.TEMP. F( C) 72(22.2) 76(24.4) (15.0) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (17.2) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (19.4) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (21.7) 80(26.7) 84(28.9) 88(31.1) 76(24.4) (23.9)
Page 65 Indoor Unit: TH4242 Outdoor Unit: CH4242 • 230V / 1 phase / 60Hz RATING CAPACITY : 42,000 BTU/h EVAPORATOR ENT.TEMP. F( C) 72(22.2) 76(24.4) (15.0) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (17.2) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (19.4) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (21.7)
Page 66 Indoor Unit: TH4242 • 208V / 1 phase / 60Hz RATING CAPACITY : EVAPORATOR ENT.TEMP. F( C) 72(22.2) 76(24.4) (15.0) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (17.2) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (19.4) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (21.7) 80(26.7) 84(28.9) 88(31.1) 76(24.4) (23.9)
Page 67 Indoor Unit: UH2442 Outdoor Unit: CH2442 • 230V / 1 phase / 60Hz RATING CAPACITY : 24,000 BTU/h EVAPORATOR ENT.TEMP. F( C) 72(22.2) 76(24.4) (15.0) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (17.2) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (19.4) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (21.7)
Page 68 Indoor Unit: UH2442 Outdoor Unit: CH2442 • 208V / 1 phase / 60Hz RATING CAPACITY : EVAPORATOR ENT.TEMP. F( C) 72(22.2) 76(24.4) (15.0) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (17.2) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (19.4) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (21.7) 80(26.7) 84(28.9)
Page 69 Indoor Unit: UH3642 Outdoor Unit: CH3642 • 230V / 1 phase / 60Hz RATING CAPACITY : 34,500 BTU/h EVAPORATOR ENT.TEMP. F( C) 72(22.2) 76(24.4) (15.0) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (17.2) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (19.4) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (21.7)
Page 70 Indoor Unit: UH3642 Outdoor Unit: CH3642 • 208V / 1 phase / 60Hz RATING CAPACITY : EVAPORATOR ENT.TEMP. F( C) 72(22.2) 76(24.4) (15.0) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (17.2) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (19.4) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (21.7) 80(26.7) 84(28.9)
Page 71 Indoor Unit: KH2442 Outdoor Unit: CH2442 • 230V / 1 phase / 60Hz RATING CAPACITY : 22,000 BTU/h EVAPORATOR ENT.TEMP. F( C) 72(22.2) 76(24.4) (15.0) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (17.2) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (19.4) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (21.7)
Page 72 Indoor Unit: KH2442 Outdoor Unit: CH2442 • 208V / 1 phase / 60Hz RATING CAPACITY : EVAPORATOR ENT.TEMP. F( C) 72(22.2) 76(24.4) (15.0) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (17.2) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (19.4) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (21.7) 80(26.7) 84(28.9)
Page 73 Indoor Unit: KH3642 Outdoor Unit: CH3642 • 230V / 1 phase / 60Hz RATING CAPACITY : 33,000 BTU/h EVAPORATOR ENT.TEMP. F( C) 72(22.2) 76(24.4) (15.0) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (17.2) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (19.4) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (21.7)
Page 74 Indoor Unit: KH3642 Outdoor Unit: CH3642 • 208V / 1 phase / 60Hz RATING CAPACITY : EVAPORATOR ENT.TEMP. F( C) 72(22.2) 76(24.4) (15.0) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (17.2) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (19.4) 80(26.7) 84(28.9) 88(31.1) 72(22.2) 76(24.4) (21.7) 80(26.7) 84(28.9)
Page 75: Heating Capacity
1-8 Heating Capacity Indoor entering air temperature: 70 F Outdoor ambient temp. ( F DB at 75% RH) I - 71 1. Specifications 2182_X_S SM830082...
Page 76: Performance Charts
1-9 Performance Charts Cooling Characteristics (1) Operating Current 1 1 1 1 1 Indoor Unit: XH2442 Operating current characteristics versus outdoor ambient temperature and indoor temperature. (Indoor relative humidity: 50%, Indoor fan speed: High) 230V Outdoor fan speed (15) (20) (25) Outdoor ambient temp.
Page 77 1-9 Performance Charts Cooling Characteristics (1) Operating Current 1 1 1 1 1 Indoor Unit: XH4242 Operating current characteristics versus outdoor ambient temperature and indoor temperature. (Indoor relative humidity: 50%, Indoor fan speed: High) 230V Outdoor fan speed High (15) (20) (25) (30)
Page 78 1-9 Performance Charts Cooling Characteristics (1) Operating Current 1 1 1 1 1 Indoor Unit: TH2442 Operating current characteristics versus outdoor ambient temperature and indoor temperature. (Indoor relative humidity: 50%, Indoor fan speed: High) 230V Outdoor fan speed (15) (20) (25) Outdoor ambient temp.
Page 79 1-9 Performance Charts Cooling Characteristics (1) Operating Current 1 1 1 1 1 Indoor Unit: TH4242 Operating current characteristics versus outdoor ambient temperature and indoor temperature. (Indoor relative humidity: 50%, Indoor fan speed: High) 230V Outdoor fan speed High (15) (20) (25) (30)
Page 80 1-9 Performance Charts Cooling Characteristics (1) Operating Current 1 1 1 1 1 Indoor Unit: UH2442 Operating current characteristics versus outdoor ambient temperature and indoor temperature. (Indoor relative humidity: 50%, Indoor fan speed: High) 230V Outdoor fan speed (15) (20) (25) Outdoor ambient temp.
Page 81 1-9 Performance Charts Cooling Characteristics (1) Operating Current 1 1 1 1 1 Indoor Unit: KH2442 Operating current characteristics versus outdoor ambient temperature and indoor temperature. (Indoor relative humidity: 50%, Indoor fan speed: High) 230V Outdoor fan speed High (15) (20) (25) (30)
Page 82 1-9 Performance Charts Heating Characteristics (1) Operating Current 1 1 1 1 1 Indoor Unit: XH2442 Operating current characteristics versus outdoor ambient temperature and indoor temperature. (Indoor relative humidity: 50%, Indoor fan speed: High) 230V (–10) (–5) ( 0 ) Outdoor ambient temp.
Page 83 1-9 Performance Charts Heating Characteristics (1) Operating Current 1 1 1 1 1 Indoor Unit: XH4242 Operating current characteristics versus outdoor ambient temperature and indoor temperature. (Indoor relative humidity: 50%, Indoor fan speed: High) 230V (–10) (–5) ( 0 ) ( 5 ) Outdoor ambient temp.
Page 84 1-9 Performance Charts Heating Characteristics (1) Operating Current 1 1 1 1 1 Indoor Unit: TH2442 Operating current characteristics versus outdoor ambient temperature and indoor temperature. (Indoor relative humidity: 50%, Indoor fan speed: High) 230V (–10) (–5) ( 0 ) Outdoor ambient temp.
Page 85 1-9 Performance Charts Heating Characteristics (1) Operating Current 1 1 1 1 1 Indoor Unit: TH4242 Operating current characteristics versus outdoor ambient temperature and indoor temperature. (Indoor relative humidity: 50%, Indoor fan speed: High) 230V (–10) (–5) ( 0 ) ( 5 ) Outdoor ambient temp.
Page 86 1-9 Performance Charts Heating Characteristics (1) Operating Current 1 1 1 1 1 Indoor Unit: UH2442 Operating current characteristics versus outdoor ambient temperature and indoor temperature. (Indoor relative humidity: 50%, Indoor fan speed: High) 230V (–10) (–5) ( 0 ) Outdoor ambient temp.
Page 87 1-9 Performance Charts Heating Characteristics (1) Operating Current 1 1 1 1 1 Indoor Unit: KH2442 Operating current characteristics versus outdoor ambient temperature and indoor temperature. (Indoor relative humidity: 50%, Indoor fan speed: High) 230V (–10) (–5) ( 0 ) ( 5 ) Outdoor ambient temp.
Page 88: Operating Pressure
1-9 Performance Charts Cooling Characteristics (2) Operating Pressure 1 1 1 1 1 Indoor Unit: 24 Type • High Pressure High pressure characteristics versus outdoor ambient temperature and indoor temperature. (Indoor relative humidity: 50%, Indoor fan speed: High) 230V / 208V •...
Page 89 1-9 Performance Charts Cooling Characteristics (2) Operating Pressure 1 1 1 1 1 Indoor Unit: 36 Type • High Pressure High pressure characteristics versus outdoor ambient temperature and indoor temperature. (Indoor relative humidity: 50%, Indoor fan speed: High) 230V / 208V (15) •...
Page 90 1-9 Performance Charts Cooling Characteristics (2) Operating Pressure 1 1 1 1 1 Indoor Unit: 42 Type • High Pressure High pressure characteristics versus outdoor ambient temperature and indoor temperature. (Indoor relative humidity: 50%, Indoor fan speed: High) 230V / 208V •...
Page 91 1-9 Performance Charts Heating Characteristics (2) Operating Pressure 1 1 1 1 1 Indoor Unit: 24 Type • High Pressure High pressure characteristics versus outdoor ambient temperature and indoor temperature. (Indoor relative humidity: 50%, Indoor fan speed: High) 230V / 208V (–10) •...
Page 92 1-9 Performance Charts Heating Characteristics (2) Operating Pressure 1 1 1 1 1 Indoor Unit: 36 Type • High Pressure High pressure characteristics versus outdoor ambient temperature and indoor temperature. (Indoor relative humidity: 50%, Indoor fan speed: High) 230V / 208V (–10) Outdoor Unit: CH3642 (–5)
Page 93 1-9 Performance Charts Heating Characteristics (2) Operating Pressure 1 1 1 1 1 Indoor Unit: 42 Type • High Pressure High pressure characteristics versus outdoor ambient temperature and indoor temperature. (Indoor relative humidity: 50%, Indoor fan speed: High) 230V / 208V (–10) •...
Page 94 1-10 Noise Criterion Curves 4-Way Air Discharge Semi-concealed Type MODEL : XH2442 SOUND LEVEL : HIGH 38 dB(A), NC 31 31 dB(A), NC 23 CONDITION : Center, Under the unit 4.9 ft. SOURCE : 208 - 230 V, 1 Phase, 60 Hz APPROXIMATE THRESHOLD OF HEARING FOR...
Page 95 1-10 Noise Criterion Curves Ceiling Mounted Type MODEL : TH2442 SOUND LEVEL : HIGH 40 dB(A), NC 34 36 dB(A), NC 26 CONDITION : Distance 3.3 ft., Under the unit 3.3 ft. SOURCE : 208 - 230 V, 1 Phase, 60 Hz APPROXIMATE THRESHOLD OF HEARING FOR...
Page 96: Noise Criterion Curves
1-10 Noise Criterion Curves Concealed Duct Type MODEL : UH2442 SOUND LEVEL : HIGH 34 dB(A), NC 22 / LOW 27 dB(A), NC 18 CONDITION : Under the unit 4.9 ft. SOURCE : 208 - 230 V, 1 Phase, 60 Hz APPROXIMATE THRESHOLD OF HEARING FOR...
Page 97: Wall Mounted Type
1-10 Noise Criterion Curves Wall Mounted Type MODEL : KH2442 SOUND LEVEL : HIGH 45 dB(A), NC 38 40 dB(A), NC 33 CONDITION : Distance 3.3 ft., Under the unit 3.3 ft. SOURCE : 208 - 230 V, 1 Phase, 60 Hz APPROXIMATE THRESHOLD OF HEARING FOR...
Page 98 1-10 Noise Criterion Curves Outdoor Units MODEL : CH2442 SOUND LEVEL : 53 dB(A), NC 44 CONDITION : Distance 1m, Height 1m SOURCE : 230 - 208 V, 1 Phase, 60 Hz APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE BAND CENTER FREQUENCIES, Hz MODEL : CH4242 SOUND LEVEL : 56 dB(A), NC 47...
Page 99: Increasing The Fan Speed
1-11 Increasing the Fan Speed If external static pressure is too great (due to long extension of ducts, for example), the air flow volume may drop too low at each air outlet. This problem may be solved by increasing the fan speed using the following procedure: (1) Remove 4 screws on the electrical component box and remove the cover plate.
Page 100: Air Throw Distance Chart
1-12 Air throw distance chart 4-Way Air Discharge Semi-concealed Type Model: 24 Type HORIZONTAL DISTANCE (ft.) AXIS AIR VELOCITY Model: 36, 42 Type HORIZONTAL DISTANCE (ft.) AXIS AIR VELOCITY Condition Fan Speed : Hi Room air temp. : 80 ˚C DB in cooling mode I - 96 1.
Page 101: Air Throw Distance Chart
1-12 Air throw distance chart Ceiling Mounted Type Model: 24 Type Model: 36 Type Model: 42 Type FAN SPEED ROOM AIR TEMP. LOUVER ANGLE HORIZONTAL DISTANCE (ft.) AXIS AIR VELOCITY 2115_T_I HORIZONTAL DISTANCE (ft.) AXIS AIR VELOCITY HORIZONTAL DISTANCE (ft.) AXIS AIR VELOCITY COOLING HEATING...
Page 102 1-12 Air throw distance chart Wall Mounted Type MODEL: KHS2442 FAN SPEED ROOM AIR TEMP. FLAP ANGLE MODEL: KHS3642 FAN SPEED ROOM AIR TEMP. FLAP ANGLE 67.5 22.5 COOLING - - - - - HEATING HIGH 80 F 0 , 22.5 , 45 Horizontal distance (ft.) 67.5 COOLING - - - - - HEATING...
Page 103: Installation Instructions
1-13 Installation Instructions Tubing Length Refrigerant tubing between the indoor and outdoor units should be kept as short as possible. Select and decide the installation location so that the length of the refrigerant tubing will be within the limits given in Table 1-10. Table 1-10 Tubing Data Narrow tube...
Page 104: Selecting The Installation Site
SELECTING THE INSTALLATION SITE Indoor Unit AVOID: areas where leakage of flammable gas may be expected. places where large amounts of oil mist exist. direct sunlight. locations near inverter lamps which may affect performance of the unit. locations near heat sources which may affect performance of the unit.
Page 105 Outdoor Unit AVOID: heat sources, exhaust fans, etc. (Fig. 2-1) damp, humid or uneven locations. choose a place as cool as possible. choose a place that is well ventilated and outside air temperature does not exceed maximum 115 F constantly. allow enough room around the unit for air intake/ exhaust and possible maintenance.
Page 106 Air Discharge Chamber for Top Discharge Install the air-discharge chamber in the field when: it is difficult to keep a space of minimum 2 ft. between the air-discharge outlet and the obstacle. the air-discharge outlet is facing the sidewalk and discharge hot air can annoy the passers-by.
Page 107 Precautions When Installing in Heavy Snow Areas (1) The platform should be higher than the maximum. snow depth. (Fig. 2-5) (2) The two anchoring feet of the outdoor unit should be attached to the platform, and the platform should be installed beneath the air-intake side of the outdoor unit.
Page 108: Electrical Wiring
ELECTRICAL WIRING General Precautions on Wiring (1) Before wiring, confirm the rated voltage of the unit as shown on its nameplate, then carry out the wiring closely following the wiring diagram. (2) Provide a power outlet to be used exclusively for each unit, and a power supply disconnect and circuit breaker for overcurrent protection should be provided in the exclusive line.
Page 109: Wiring System Diagrams
Wiring System Diagrams (1) Basic wiring diagram for standard control Indoor Unit Inter-unit power wiring Single phase 230/208V Inter-unit control wiring (Low voltage) Remote controller (Option) *Remote controller wirings are wire joint connection. NOTE Refer to “Recommended Wire Length and Wide Diameter for Power Supply System”...
Page 110 (2) Basic wiring diagram for group control This diagram shows when several units (max. 8) are controlled by a remote controller. In this case, a remote controller can be connected at any indoor unit. Inter-unit power wiring single phase 230/208V Inter-unit control wiring (Low voltage)
Page 111: Electrical Characteristics
Electrical characteristics Electrical Data Indoor model: XH2442 / Outdoor model: CH2442 Cooling Indoor Unit Fan Motor Performance at 230 - 208 V / 1 phase / 60 Hz 0.6 - 0.6 Rating conditions 0.12 - 0.11 0.6 - 0.6 Full load conditions 0.12 - 0.11 Starting amperes 1 - 1...
Page 112 Indoor model: XH3642 / Outdoor model: CH3642 Cooling Performance at Rating conditions Full load conditions Starting amperes Heating Performance at Rating conditions Full load conditions Starting amperes Cooling: Rating Conditions Full Load Conditions : Indoor Air Temperature Heating: Rating Conditions Full Load Conditions : Indoor Air Temperature Indoor Unit Outdoor Unit...
Page 113 Electrical characteristics Electrical Data Indoor model: XH4242 / Outdoor model: CH4242 Cooling Indoor Unit Fan Motor Performance at 230 V Rating conditions Full load conditions Starting amperes Heating Indoor Unit Fan Motor Performance at 230 V Rating conditions 0.19 Full load conditions 0.19 Starting amperes Cooling:...
Page 114 Indoor model: TH2442 / Outdoor model: CH2442 Cooling Performance at Rating conditions Full load conditions Starting amperes Heating Performance at Rating conditions Full load conditions Starting amperes Cooling: Rating Conditions Full Load Conditions : Indoor Air Temperature Heating: Rating Conditions Full Load Conditions : Indoor Air Temperature Indoor Unit Outdoor Unit...
Page 115 Indoor model: TH3642 / Outdoor model: CH3642 Cooling Indoor Unit Fan Motor Performance at 230 - 208 V / 1 phase / 60 Hz 0.7 - 0.7 Rating conditions 0.16 - 0.14 0.7 - 0.7 Full load conditions 0.16 - 0.14 Starting amperes Heating Indoor Unit...
Page 116 Indoor model: TH4242 / Outdoor model: CH4242 Cooling Performance at Rating conditions Full load conditions Starting amperes Heating Performance at Rating conditions Full load conditions Starting amperes Cooling: Rating Conditions Full Load Conditions : Indoor Air Temperature Heating: Rating Conditions Full Load Conditions : Indoor Air Temperature Indoor Unit Outdoor Unit...
Page 117 Indoor model: UH2442 / Outdoor model: CH2442 Cooling Indoor Unit Fan Motor Performance at 230 - 208 V / 1 phase / 60 Hz 0.9 - 0.8 Rating conditions 0.18 - 0.16 0.9 - 0.8 Full load conditions 0.18 - 0.16 Starting amperes Heating Indoor Unit...
Page 118 Indoor model: UH3642 / Outdoor model: CH3642 Cooling Performance at Rating conditions Full load conditions Starting amperes Heating Performance at Rating conditions Full load conditions Starting amperes Cooling: Rating Conditions Full Load Conditions : Indoor Air Temperature Heating: Rating Conditions Full Load Conditions : Indoor Air Temperature Indoor Unit Outdoor Unit...
Page 119 Indoor model: KH2442 / Outdoor model: CH2442 Cooling Indoor Unit Fan Motor Performance at 230 - 208 V / 1 phase / 60 Hz 0.4 - 0.4 Rating conditions 0.08 - 0.07 0.4 - 0.4 Full load conditions 0.08 - 0.07 Starting amperes 1 - 1 Heating...
Page 120 Indoor model: KH3642 / Outdoor model: CH3642 Cooling Performance at Rating conditions Full load conditions Starting amperes Heating Performance at Rating conditions Full load conditions Starting amperes Cooling: Rating Conditions Full Load Conditions : Indoor Air Temperature Heating: Rating Conditions Full Load Conditions : Indoor Air Temperature Indoor Unit Outdoor Unit...
Page 121 2. PROCESSES AND FUNCTIONS Room Temperature Control ... II - 2 (A)Cooling ... II - 2 (B)Heating ... II - 3 Cold Draft Prevention (Heating Cycle) ... II - 4 Automatic Fan Speed (Indoor Unit) ... II - 5 (A)Cooling ... II - 5 (B)Heating ...
Page 122: Room Temperature Control
2-1 Room Temperature Control The Unit adjusts room temperature by turning the outdoor unit’s compressor ON and OFF. This process is controlled by the thermostat located in the remote control unit. The figures on this and the next pages show how each part of the system performs when the room temperature changes and the thermostat activates the compressor to start (thermo ON) or stop (thermo OFF).
Page 123: Processes And Functions
(B) Heating THERMO. ON REMOTE CONTROL SENSOR (Only for wireless remote controller) SET. +2 F SETTING TEMP. SET. –2 F BODY SENSOR THERMO. ON +2 F SET TEMP.+7 F SHIFT –2 F SET TEMP. COMPRESSOR OUTDOOR FAN (H OR M) 3 SECONDS INDOOR FAN STANDBY...
Page 124: Cold Draft Prevention (Heating Cycle)
2-2 Cold Draft Prevention (Heating Cycle) The cold draft prevention function controls indoor fan speed so a strong draft of cold air will not blow out before the indoor heat exchange coils have warmed up. STANDBY shows on the remote controller when the indoor fan speed is LL (very low) or OFF.
Page 125: Automatic Fan Speed (Indoor Unit)
2-3 Automatic Fan Speed (Indoor Unit) By pressing the FAN SPEED button on the remote controller, the fan speed can be set at one of four steps: AUTO., HI., MED., or LO. When set at AUTO. the indoor unit fan speed will be automatically adjusted to the room temperature as the two charts shown below.
Page 126: Outdoor Fan Speed Control
2-4 Outdoor Fan Speed Control To optimize the performance of air conditioner, the outdoor fan speed is selected automatically according to the outdoor temperature. Note that in both Cooling and Heating modes, the fan comes on at first at high speed (H mode) for 5 seconds.
Page 127: Freeze Prevention (Cooling)
2-5 Freeze Prevention (Cooling) Freeze Prevention keeps the indoor heat exchange coil from freezing. Freezing reduces the efficiency of the unit, and frost build up on the coil blocks cool air circulation from the indoor unit's fan. MIN. VALUE OF EITHER E1 OR E2 INDOOR UNIT TEMP.
Page 128: Condensing Temperature Control (Cooling)
2-6 Condensing Temperature Control (Cooling) Condensing temperature is controlled by the outdoor heat exchanger coil temperature as sensed by sensor C2. OUTDOOR UNIT COIL TEMP. C2 ( F) OUTDOOR FAN SPEED ELECTRONIC REF. CONTROL VALVE This chart shows how the outdoor fan speed and the electronic refrigerant control valve react to coil temperature to control condensing temperature.
Page 129: Overload Protection (Heating)
2-7 Overload Protection (Heating) This function prevents the air conditioner from overloading. ( F) INDOOR UNIT COIL TEMP. (E2) FUZZY CONTROL ELECTRONIC REF. CONTROL VALVE OUTDOOR FM This chart shows how the outdoor fan speed and the electronic refrigerant control valve react to coil temperature to keep the indoor heat exchanger coil from overloading.
Page 130: Discharge Temperature Control (Cooling And Heating)
2-8 Discharge Temperature Control (Cooling and Heating) This function prevents the compressor motor from burnout by overheating. (42 Type) DISCHARGE GAS TEMP. ( F) OUTDOOR FAN SPEED COMPRESSOR ELECTRONIC REF. CONTROL VALVE (DISCHARGE TEMP.) Discharge temperature is sensed by TH8 (discharge gas sensor). When the temperature rises above 203°F (24, 36 Type) the electronic refrigerant control valve opens at 50 steps/30 seconds until the temperature falls below 200°F (24, 36 Type) .
Page 131: Auto. Mode For Automatic Heating/Cooling Switching
2-9 Auto. Mode for Automatic Heating/Cooling Switching When the AUTO mode is selected, the microprocessor calculates the difference between the set temperature and the room temperature, and automatically switches to the COOLING or HEATING mode to maintain the desired temperature. Room temp.
Page 132 This chart shows how the Operation Mode (COOLING or HEATING) is determined by the microprocessor taking the room temperature into consideration. It also shows the temperature points at which the cooling or heating mode is switched, when the AUTO mode is selected.
Page 133: Defrosting Control, Outdoor Heat Exchanger Coil (Heating)
2-10 Defrosting Control, Outdoor Heat Exchanger Coil (Heating) When the outdoor temperature is low, frost may form on the outdoor heat exchanger coil. When this occurred, the defrosting system operates. The microprocessor in the outdoor unit monitors the relationship between the temperature of the outdoor heat exchanger coil and the outdoor temperature so it can defrost when necessary.
Page 134: 4-Way Valve, Solenoid Control
2-11 4-Way Valve, Solenoid Control The basic function of the 4-way valve is to direct the refrigerant in the correct direction according to the Operation Mode (COOLING or HEATING) selected. The following two charts show conditions of the controls and functions listed in the left hand column when the solenoid is ON or OFF.
Page 135: Automatic Restart After Power Interruption
(B) AUTO Control Mode POWER SOURCE OPERATION BUTTON AUTO COOL MODE CONTROL HEAT 3 MINUTES COMPRESSOR SOLENOID COIL (4-WAY VALVE) When the Compressor has stopped while in AUTO mode, the 4-way valve switches on (heating) or off (cooling) within 1 minute according to the following conditions: 2-12 Automatic Restart after Power Interruption This air conditionner has a power failure recovery function.
Page 136: Compressor Discharge Gas Temperature
2-13 Electronic Refrigerant Control Valve This valve allows very precise and smooth control of the amount of refrigerant flow in the system. Since the valve is operated by a step motor, the control circuits can open or close it in very exact amounts, so the degree of heating or cooling can be changed by just a little, or changed very quickly or slowly.
Page 137: Compressor Current Detection Circuit
2-15 Compressor Current Detection Circuit The Compressor Current Detection Circuit detects the compressor current and, depending on the current range, can stop the compressor motor so it will not be damaged by overcurrent. Overcurrent can be caused by several factors, particularly mechanical seizing of the compressor or liquid backflow.
Page 138: Electronic Refrigerant Control Valve Control
2-16 Electronic Refrigerant Control Valve Control The circulation volume of the refrigerant is controlled by a pulse type electronic control valve. When the power is switched ON, the opening degree of the electronic control valve is controlled between 90 and 480 steps after setting the initial step at the time when the thermostat is ON.
Page 139: Voltage Detection Control
2-17 Voltage Detection Control When the power voltage falls below 160 V or rises above 260 V, operation lamp and stand-by lamp flash alternately to protect the compressor and electrical components. 2. Processes and functions II - 19 Section SM830082...
Page 140: Electrical Data
3. ELECTRICAL DATA Indoor Units (Electric Wiring Diagram, Schematic Diagram) ... III - 2 4-Way Air Discharge Semi-concealed Type ... III - 2 Ceiling Mounted Type ... III - 4 Concealed Duct Type ... III - 6 Concealed Duct High Static Pressure Type ... III - 8 Outdoor Units (Electric Wiring Diagram, Schematic Diagram) ...
Page 141: Indoor Units
Indoor Units 4-Way Air Discharge Semi-concealed Type : XH2442, XH3642, XH4242 GRN/YEL GRN/YEL GRN/YEL III - 2 3. Electrical data GRN/YEL GRN/YEL SM830082...
Page 142: Schematic Diagram
4-Way Air Discharge Semi-concealed Type : XH2442, XH3642, XH4242 • Schematic Diagram F1(5A) 5P-1 5P-2 LL L F2(5A) Symbols Description Indoor Fan Motor Motor Operated Valve 49FI Indoor Motor Thermal Protector Running Capacitor Power Transformer Drain Pump Float Switch Room Thermistor Thermistor (Indoor Coil E1) Thermistor (Indoor Coil E2) Thermistor (Indoor Coil E3)
Page 143 Ceiling Mounted Type : TH2442, TH3642, TH4242 GRN/YEL (BLK) Connecter Terminal GRN/YEL Earth III - 4 3. Electrical data GRN/YEL (WHT) Connecter SM830082...
Page 144 Ceiling Mounted Type : TH2442, TH3642, TH4242 • Schematic Diagram F1(5A) 5P-1 5P-2 LL L F2 (5A) Symbols Description Indoor Fan Motor 49FI Indoor Motor Thermal Protector Running Capacitor F1, 2 Fuse Auto Louver Motor Power Transformer 1X~3X Auxiliary Relay RY1, 2, 4 Auxiliary Relay Motor Operated Valve...
Page 145 Concealed Duct Type : UH2442, UH3642 GRN/YEL (WHT) Connecter (BLU) Connecter GRN/YEL III - 6 3. Electrical data SM830082...
Page 146 Concealed Duct Type : UH2442, UH3642 • Schematic Diagram Terminal Plate (5P) F1(5A) LL L F2(5A) Symbols Description Indoor Fan Motor 49FI Indoor Motor Thermal Protector Running Capacitor F1, 2 Fuse Drain Pump Float Switch Power Transformer 1X~3X Auxiliary Relay Auxiliary Relay Motor Operated Valve Room Thermistor...
Page 147 Wall Mounted Type : KH2442 GRN/YEL (WHT) Connecter (BLU) Connecter III - 8 3. Electrical data SM830082...
Page 148 Wall Mounted Type : KH2442 • Schematic Diagram Terminal Plate (4P) F1(5A) LL L F2(5A) Symbols Description Indoor Fan Motor 49FI Indoor Motor Thermal Protector Running Capacitor F1, 2 Fuse Auto Louver Motor Power Transformer 1X~3X Auxiliary Relay Auxiliary Relay Motor Operated Valve Room Thermistor Thermistor (Indoor Coil E1)
Page 149 Wall Mounted Type : KH3642 GRN/YEL (WHT) Connecter (WHT) Connecter (BLU) Connecter III - 10 3. Electrical data SM830082...
Page 150 Wall Mounted Type : KH3642 • Schematic Diagram Terminal Plate (4P) F1(5A) LL L F2(5A) Symbols Description Indoor Fan Motor 49FI Indoor Motor Thermal Protector Running Capacitor F1, 2 Fuse Auto Louver Motor Power Transformer 1X~3X Auxiliary Relay Auxiliary Relay Motor Operated Valve Room Thermistor Thermistor (Indoor Coil E1)
Page 151 3-2 Outdoor Units 1 1 1 1 1 CH2442 III - 12 3. Electrical data SM830082...
Page 152 3-2 Outdoor Units 1 1 1 1 1 CH2442 Terminal Plate (5P) 63PH Symbols Description Compressor Motor Outdoor Fan Motor Compressor Motor Magnetic Contactor 49FO Outdoor Fan Motor Thermal Protector 63PH High Pressure Switch Current Transmitter RC1,2 Running Capacitor Power Transformer Crank Case Heater Four Way Valve F1,2...
Page 153 3-2 Outdoor Units 2 2 2 2 2 CH3642 III - 14 3. Electrical data SM830082...
Page 154 3-2 Outdoor Units 2 2 2 2 2 CH3642 Terminal Plate (5P) 63PH FMO1 Symbols Description Compressor Motor FMO1,2 Outdoor Fan Motor Compressor Motor Magnetic Contactor 49FO1,2 Outdoor Fan Motor Thermal Protector 63PH High Pressure Switch Current Transmitter RC1,2,3 Running Capacitor Power Transformer Crank Case Heater Four Way Valve...
Page 155 3-2 Outdoor Units 3 3 3 3 3 CH4242 III - 16 3. Electrical data SM830082...
Page 156 3-2 Outdoor Units 3 3 3 3 3 CH4242 Terminal Plate (5P) 63PH FMO1 Symbols Description Compressor Motor FMO1,2 Outdoor Fan Motor Compressor Motor Magnetic Contactor 49FO1,2 Outdoor Fan Motor Thermal Protector 63PH High Pressure Switch Current Transmitter RC1,2,3 Running Capacitor Power Transformer Crank Case Heater Four Way Valve...
Page 157: Service Procedures
4. SERVICE PROCEDURES Troubleshooting ... IV - 2 (1) Check before and after Troubleshooting ... IV - 3 (2) General Troubleshooting Flow Chart: Diagnosis and Remedy ... IV - 4 (3) Meanings of alarm messages ... IV - 6 (4) LED Indication on the Outdoor Unit’s P.C.B. Ass’y ... IV - 8 (5) Symptoms and parts to inspect ...
Page 158: Troubleshooting
4-1 Troubleshooting This section explains: What the LED codes mean What the remote control unit display screen messages mean How to use the flow charts to find and solve problems How to use the self-diagnostic tests to find parts that aren’t working right This unit is made to be trouble free, and not need much service.
Page 159: Check Before And After Troubleshooting
(1) Check before and after Troubleshooting Many problems may happen because of wiring or power supply problems, so you should check these areas first. Problems here can cause false results in some of the other tests, and so should be corrected first. 1 1 1 1 1 .
Page 160: General Troubleshooting Flow Chart: Diagnosis And Remedy
(2) General Troubleshooting Flow Chart: Diagnosis and Remedy When you have found a major problem, such as refrigerant not flowing in the system or reduced air circulation, come to this section and find the box listing the problem. Connected to the box are the main causes of the problem and their remedies. To find out which malfunction is happening in your case, check the remote controller for an Alarm Message, and follow the steps in section 3).
Page 161 (B) Heating b. Heating Poor heating Refrigerant flow failure Not enough air circulation Cold air is discharged. Cold draft prevention is not working. Is setting temp. Change the setting temp. suitable ? Is heating load Review heating load too large ? estimate.
Page 162: Meanings Of Alarm Messages
Meanings of alarm messages Possible Cause of Malfunction Remote controller is detecting • Serial error signal from indoor unit. commu- nication • Indoor unit is detecting error signal from the remote controller. errors (No serial communications signal) • Mis-setting Indoor unit is detecting error signal from outdoor unit.
Page 163 Possible Cause of Malfunction Thermistor Indoor thermistor is either open failure or damaged. Outdoor thermistor is either open or damaged. EEPROM (ICB of PCB) failure Fault with Protective device for comp. is comp. and its activated. circuit Possible cause of Malfunction Model setting of indoor unit is not matching the outdoor unit.
Page 164: Led Indication On The Outdoor Unit's P.c.b. Ass'y
(4) LED Indication on the Outdoor Unit’s P.C.B. Ass’y If something goes wrong with the outdoor unit, LED lamps on the outdoor P.C.B. Ass’y light up to show the cause of the trouble, in addition to the Alarm message on the remote controller.
Page 165: Symptoms And Parts To Inspect
Symptoms and parts to inspect Symptom: LCD on the remote controller does not display and remote controller does not operate. Miswiring of Is there 230-208 V AC power supply between U1 and U2 wires and of the terminal plate? indoor/outdoor control lines Correct the Check and repair the...
Page 166 Symptom: LCD on the remote controller displays “CHECK E01”. (Unusual communication between remote controller and indoor unit.) Start Remote controller judges itself with self-diagnostic functions Is there an open or a contact defect in the No. 1 line of the remote controller? Is there 230 -208 V AC between U1 and U2 of terminal plate?
Page 167 Symptom: LCD on the remote controller is displaying “CHECK E04”. (Unusual communication between the indoor and outdoor units.) Start Cut the breaker and remove the indoor/outdoor unit control lines connected to U1 and U2 of the indoor unit 8P terminal plate. After shorting the test pin (CN2) on the indoor unit PCB, switch the breaker on.
Page 168 Symptom: LCD on the remote controller is displaying “CHECK E06”. (Unusual communication between the indoor and outdoor units) Is the setting for the indoor address on the indoor unit PCB inappropriate? Is there a cut line or contact defect between an indoor and outdoor unit’s control line? Influenced by external noise Symptom: LCD on the remote controller is displaying “CHECK E08”.
Page 169 Symptom: LCD on the remote controller displays “CHECK P01”. (Indoor fan protection thermostat operation warning) Start Is there 230-208 V AC between T20-1 and T20-3 on the indoor unit PCB? Replace the indoor unit PCB. Is the indoor fan wire winding protection thermostat (49FI) off? Replace the indoor fan.
Page 170 10) Symptom: LCD on the remote controller displays “CHECK P02”. (Compressor / outdoor fan protection thermostat operation warning / power supply voltage abnormality) Start Is the power supply to the outdoor unit normal? (Voltage / defective phase?) Is the fuse on the outdoor unit PCB blown (F1 and F2)? Is the high pressure switch (63 PH) off?
Page 171 11) Symptoms: LCD on the remote controller displays “CHECK P03”. (Alarm for unusual discharge temp. of compressor) Start Unusual discharge gas temperature • Refrigerant shortage • Clogged refrigerant circuit • Electronic refrigerant control valve defect (indoor unit) 12) Symptom: LCD on the remote controller displays “CHECK P04”. (High-pressure switch activation warning) Start The system does not operate again.
Page 172 13) Symptom: LCD on the remote controller displays “CHECK P05”. (Negative phase detection operation warning) Is the power supply to the outdoor unit normal? (Voltage defective phase?) Does the outdoor unit operate when two of the three phases are changed? (Actuation of negative phase protector) Is the fuse (F1, F2) on the indoor unit PCB blown?
Page 173 15) Symptom: LCD on the remote controller displays “CHECK E16”. Start When the group of the units are installed, is there any mis-cross between inter unit control wiring and refrigerant tubing? Are the total capacities of indoor units to that of outdoor units more than 107%? Confirm less than 5 indoor units are connected.
Page 174 18) Symptom: LCD on the remote controller displays “CHECK H01, H02, H03”. (compressor current detection) * Please check the related part described in the following chart after confirming the code setting (S4) of the outdoor unit’s capacity on the PCB in the outdoor unit. Start “CHECK H01”...
Page 175: Procedures When A Specific Component Does Not Work
Procedures When a Specific Component Does Not Work Indoor fan does not operate. Is fan motor capacitor normal ? Is there voltage output of P.C.B. Ass'y for fan motor ? • Check resistance of fan motor winding. Replace the fan motor. Flaps in indoor unit’s air outlet does not operate, when you press SWEEP button.
Page 176 Compressor motor does not operate. Does compressor motor magnetic contactor (52C) actuate ? Check resistance of compressor motor winding. Replace the compressor. Outdoor fan does not operate. Are auxiliary relays (1Y) normal ? Is fan motor capacitor normal ? Is there voltage output of P.C.B.
Page 177 Service Functions of Optional Wired Remote Controller From the remote controller you can control both the operation and settings of the unit as well as perform several useful service checks. This section explains how to use the remote controller on the following items from (A) to (I). (A) Use the test run procedure.
Page 178 (B) Check the sensor temperature readings The air conditioner has thermo sensors which are used to control the unit. Each sensor has an address which is made up of the indoor unit address, and the sensor address. The indoor unit address is used only when several units are hooked up to one remote controller (group control).
Page 179 Refer to the table below for the relationship between the sensor address and the location of the sensor. Relationship between the sensor address and the location of sensor Sensor Address (CODE No.) Indoor Unit Outdoor Unit 0A NOTE In case there are no sensor equipped with the unit, “- - -” is shown on the display. C Resetting the remote controller display to previous mode.
Page 180 Important Never press (clear) button unless you want to erase the accessed data in memory. Follow the procedure below only when erasing is necessary. To erase accessed data, press the When erasing is finished,“----” mark appears on the controller’s display. CAUTION After checking the alarm messages, be sure to press the (D) Check the remote controller itself for correct operation...
Page 181 Important Never press (clear) button unless you want to erase the accessed data in memory. Follow the procedure below only when erasing is necessary. To erase accessed data, press the When erasing is finished,“----” mark appears on the controller’s display. CAUTION After checking the alarm messages, be sure to press the (E) Execute the auto.
Page 182 (F) Confirm and change the indoor unit address (Ref. Fig. IV-8, IV-9) The purpose of the above function is to let you confirm the indoor unit address after the auto. address operation, and change the indoor unit address if it is needed. a Press the b Select the R.C.
Page 183 (G) Change the shift temperature in heating mode (Ref. Fig. IV-10) If the indoor unit is installed at high location (ex. ceiling level), the thermostat tends to turn off at heating mode because of the hot air temperature around ceiling level. In order to solve the problem, the shift temp.
Page 184 (H) Set the indoor unit address (Ref. Fig. IV-11, IV-12) This function is usable if the auto. address operation is not available. Indoor unit address can be set one by one by remote controller in such case. NOTE 1) In case of group control, branch wiring for group control should be removed temporarily.
Page 185 R.C. address R.C. address Indoor address Group address Fig. IV-11 ( I ) Change the period of the filter timer (Ref. Fig. IV-13) If the period of filter timer is not suitable (for example in case of dirty environment), the period can be shortened to half as follows: a Press the buttons at same time for more than 4 seconds.
Page 186: Checking The Electrical Components
4-2 Checking the Electrical Components (1) Measurement of Insulation Resistance • The electrical insulation is acceptable when the resistance exceeds 1 M . 1 1 1 1 1 Power Supply Wires Clamp the earthed wire of the Power Supply wires with a lead clip of the insulation resistance tester and measure the resistance by placing a probe on either of the power wires.
Page 187: Checking The Protective Devices
Checking the Protective Devices • Disconnect the connector, which consists of P (plug) and S (socket) when you want to check the protective device. • Then check continuity among plug’s (and/or socket’s) terminal as in Fig. IV-18. • Normality of the protective device can be judged by the following table. The Protective Device is proved normal if there is a continuity between terminals.
Page 188: Checking The Electrical Parts
Checking the Electrical Parts Power transformer (TR1) ... Indoor unit • Primary 230-208V ; Measure the resistance between No.1 and No.3 • Secondary Refer to “1-3 Other component specifications”. Power transformer (TR) ... Outdoor unit • Primary 230-208V ; Measure the resistance between No.1 and No.3 •...
Page 189 5 5 5 5 5 Motor capacitor ... Both in indoor and outdoor unit • Remove the lead wires from the capacitor terminals, and then place a probe on the capacitor terminals as shown in Fig. IV-19. Observe the deflection of the pointer, setting the resistanc measuring range of the multimeter to the maximum value.
Page 190 Solenoid coil of the electronic refrigerant control valve (ERCV) ………… Indoor unit • Measure the resistance between No. 5 (GRY lead wire) and other terminals (another color of lead wires) of 5P (WHT) plug connected to the solenoid coil. Refer to “1-2-(A) Major component specifications”. Compressor motor (CM) ………...
Page 191: Thermistor Characteristic Curve
Thermistor Characteristic Curv (1) Room temp. sensor : TH1 (KTEC-35) Temperature ( F) (3) Compressor discharge gas temp. sensor : TH8 (PTC-51H) (2) Indoor heat exch. coil sensor Outdoor heat exch. coil sensor : TH6(C1), TH7(C2) ( PBC-41E) –4 1044_M_I Temperature ( F) 1149_THS_I IV - 35...
Page 192: Pcb Setting
(5) PCB Setting Setting of outdoor control PCB (A) Standard control (single outdoor unit) In case of single outdoor unit installation, even if in case of twin, triple or quartet type (2, 3 or 4 indoor units), no setting necessary. Keep factory shipment state (R.C.
Page 193: Address Setting Method
(6) R.C. Address Setting Method Outdoor unit R.C. address setting method In case of group control or central control, set the R.C. address to 1, 2, 3, ... according to the No. of outdoor units. Refrigerant circuit address (factory setting = 0) Refrigerant circuit address (black) : S2 Refrigerant circuit address...
Page 194: Automatic Address Setting Method
(7) Automatic Address Setting Method — For group control and central control with multiple outdoor units — Carry out automatic address setting with the remote controller. (1) All auto. address operation Press the the same time for more than 4 seconds. Press the button after confirming the CODE No.
Page 195: Items To Check Prior To Test Run
(9) Items to Check Prior to Test Run Turn on the power supply switch more than 5 hours before in order to charge the crank case heater. Fully open the outdoor service valve after making the leak inspection of field connected tubing, vacuuming, and gas charging if necessary.
Page 196: Test Run
(10) Test Run Preparing for Test Run Before attempting to start the air conditioner, check the following: (1) All loose matter is removed from the cabinet especially steel filings, bits of wire, and clips. (2) The control wiring is correctly connected and all electrical connections are tight.
Page 197 Test Run Procedure Start Multiple remote control? Recheck the test items before test operation. Check the indoor and outdoor unit combination (wiring). Single type? (One indoor unit and one remote controller for one outdoor unit) Group control for multiple outdoor units? Central control for multiple outdoor...
Page 198: Pcbs And Their Location
(11) PCBs and Their Location PCB (CR-TH2442) FOR INDOOR UNITS CN85 (BLU) : DPH CN78 (BLU) : DP CN81 (GRY) : T20 CN80 (RED) : 26H CN83 (WHT) : FM CN201 (WHT) : FAN DRIVE CN8 (WHT) : LS CN6 (RED) : EXCT CN9 (RED) : FS CN33 (YEL) : ROOM TEMP P-ROM...
Page 199 PCB (CR-CH2442) FOR OUTDOOR UNITS CN013 (WHT) : CK. H CN012 (WHT) : CK. L CN011 (RED) : TEST CN008 (WHT) CN003 (WHT) : VCC CN025 (WHT) : CT1 D015 LED : POW CN004 (BLU) : OC CN005 (BRN) : EMG F003 : Fuse 125V / 0.5A CN100 (BLK) : JM...
Page 200: Checking Procedure For Each Pc Board
(12) Checking procedure for each PC Board The indoor and outdoor PCBs have functions to check the signal transmission and reception of the serial circuit and to check the microcomputer operation. (Self-diagnosis function) Precautions required when checking 1. After turning off the power to the indoor (outdoor) unit, remove the inter-unit control wiring (U1-U2) and create a short-circuit between U1 and U2.
Page 201: Tmx60 Pins
(13) TMX60 pins When shorting TMX60 pins on the indoor and outdoor PCBs, operations shown on the above table will be per- formed on each indoor and outdoor unit. Use TMX60 pins to perform a quick check. NOTE • When checking pin operation, stop the indoor and outdoor units with the remote control unit. Shorting CK.L or CK.H pin of the outdoor PCB When shorting the cooling pin (CN8) with normal operation •...
Page 202 SANYO FISHER Service Company CENTRAL REGION 1739 Sands Place, Suite G Marietta, GA 30067 Phone: (770) 951-8284 Fax: (770) 951-2077 July. / ’01 Printed in U.S.A.

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