INVENTOR LCAC Service Manual
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INVENTOR LCAC Service Manual

INVENTOR LCAC Service Manual

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AIR CONDITIONING SYSTEMS
LCAC
• SERVICE MANUAL
english

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Summary of Contents for INVENTOR LCAC

  • Page 1 AIR CONDITIONING SYSTEMS LCAC • SERVICE MANUAL english...

  • Page 3: Part 1 General Information

    Contents Part 1 General Information ............1   Part 2 Indoor Units ..............6   Part 3 Outdoor Units ............97   Part 4 Installation .............. 110   Part 5 Electrical Control System ........144   ※The specifications, designs, and information in this book are subject to change without notice for product improvement.

  • Page 4: Part 1 General Information

    General Information...
  • Page 5 General Information Part 1 General Information 1. Model Lists .................... 2 2. External Appearance ................3 2.1 Indoor Units ....................... 3 2.2 Outdoor Units ......................4 General Information...

  • Page 6: Model Lists

    Model Lis ts 1. Model Lists 1.1 Indoor Units R410A (capacity multiplied by 1000Btu/h) Type F unction Super sl im ca ss ette Coo ling and he ating ● ● ● ● ● Duc t Coo ling and heat ing ●...

  • Page 7: External Appearance

    External Ap pearance 2. External Appearance 2.1 Indoor Units Duct Super slim cassette Ceiling-Floor Compact Four-way cassette Console Floor-standing Floor-standing General Information...
  • Page 8 External Appearance 2.2 Outdoor Units Single fan outdoor unit Double fan outdoor unit General Information...

  • Page 9: Table Of Contents

    Indoor Units Part 2 Indoor Units Super Slim Cassette Type ........... 7 Duct Type ................22 Ceiling & Floor Type ............39 Four-way Cassette Type (Compact) ........55 Console Type ............... 64 Floor-standing Type ............75 Floor-standing Type ............86 Indoor Units...
  • Page 10 Super Slim Cassette Type Super Slim Cassette Type 1. Features ................8 2. Dimensions ..............11 3. Service Space ..............12 4. Air Velocity Distributions (Reference Data) ....13 5. Electric Characteristics ..........16 6. Sound Levels ..............17 7. Accessories ..............18 8.

  • Page 11: Features

    Features 1. Features Overview Compact design, super slim body size, less space requiring in installation  Each louver can be separately controlled, more comfort air blowing is possible.  Auto-lifting panel design, more convenient to clean and maintain the filter. (optional) ...
  • Page 12 Features Built-in draining pump Due to the improvement of structure, more convenient to repair or replace the draining pump.  Draining Pump Built-in draining pump to make sure condensed water drain out reliably.  Terminals for alarm lamp and long-distance on-off controller connection are standard Reserve terminals for the connection of alarm lamp and long-distance on-off controller, more human ...
  • Page 13 Features Alarm lamp Long-distance on-off controller Twins Combination(18k-30k) The units can be installed as Twin systems: one outdoor unit can connect with two indoor units. The  indoor units can be combined in any of the different available ratings. Indoor Units...

  • Page 14: Dimensions

    Dimensions 2. Dimensions 92 92 Fresh air in take 4-install hanger Bo dy Gas side Liquid side Wiring co nnection port E-parts box Service ho le for Test mouth & Test cover draining pump Drain hole 92 92 92 92 Pa nel Unit: mm Model...

  • Page 15: Service Space

    Service Space 3. Service Space >1000m m >1000mm Indoor Units...

  • Page 16: Air Velocity Distributions (Reference Data)

    Air Velocity Distributions (Reference Data) Air Velocity Distributions (Reference Data) 24K: Cooling: Heating: Indoor Units...
  • Page 17 Air Velocity Distributions (Reference Data) 36-42K: Cooling: Heating: Indoor Units...
  • Page 18 Air Velocity Distributions (Reference Data) 50-60K： Cooling: Heating: Indoor Units...

  • Page 19: Electric Characteristics

    Electric Characteristics Electric Characteristics Power Indoor Unit Supply Model Voltage V4MCI-24 220-240 V4MCI-36 220-240 V4MCI-42 220-240 V4MCI-50 220-240 V4MCI-60 220-240 Notes: MFA: Max. Fuse Amps. (A) Indoor Units...

  • Page 20: Sound Levels

    Sound Levels Sound Levels 1.4m Microphone Noise level dB(A) Model Noise Power dB(A) V4MCI-24 V4MCI-36 V4MCI-42 V4MCI-50 V4MCI-60 Indoor Units...

  • Page 21: Accessories

    Accessories Accessories Name Shape Quantity Installation paper board Installation Fittings Soundproof / insulation sheath Tubing & Fittings Out-let pipe sheath Out-let pipe clasp Drainpipe Fittings Drain joint Seal ring Remote controller & Its Frame Remote controller & Its Remote controller holder Frame(The product you have might not be provided the following...

  • Page 22: The Specification Of Power

    The Speci cation of Power 8. The Specification of Power Model 24000Btu/h 36000 Btu/h Phase 1-phase 1-phase Frequency 220-240V, 50Hz 220-240V, 50Hz Voltage INDOOR UNIT POWER WIRING POWER 3×1.0 3×1.0 CIRCUIT BREAKER 15/10 15/10 / Fuse (A) Phase 1-phase 1-phase Frequency 220-240V, 50Hz 220-240V, 50Hz...

  • Page 23: Field Wiring

    Field Wiring 9. Field Wiring Indoor Units...

  • Page 24: Wiring Diagram

    Wiring diagram 10. Wiring diagram V4MCI-24, V4MCI-36, V4MCI-42, V4MCI-50, V4MCI-60 Indoor Units...

  • Page 25: Duct Type

    Duct Type Duct Type 1. Features ................23 2. Dimensions ..............26 3. Service Space ..............27 4. Static Pressure ..............28 5. Electric Characteristics ..........31 6. Sound Levels ..............32 7. Accessories ..............33 8. The Specification of Power ..........34 9.

  • Page 26: Features

    Features Features 1.1 Installation accessories: (Optional) Front Board, Canvas Air Passage, Filter, Panel, for easy installation  Front Board Canvas Air Passage Filter Panel 1.2 Easy Installation: Two air inlet styles (Bottom side or Rear side) Air inlet from rear is standard for all capacity; air inlet from bottom is optional. ...
  • Page 27 Features Replace the motor or centrifugal fan  Remove the ventilated panel firstly. Remove a half of blower housing and take out the motor with centrifugal fan. Directly remove two bolts, and then replace the motor or centrifugal fan easily. Motor Blower Housing Ventilated Panel...

  • Page 28: Part 3 Outdoor Units

    Features 1.7 Built-in display board The standard indoor unit can be controlled by wired controller.  There is a display board with a receiver in the E-box. Move out the display, and fix it in other place, even  in the distance of 10m. The unit will realized remoter control. The wired controller and the display board can display the error code or production code when the chips ...

  • Page 29: Dimensions

    Dimensions Dimensions air inlet from rear side Air filter ( optional ) 4-install hanger Liquid side 25 Drain pipe Gas side 25 Drain pipe Test mouth & Test cover 25 Drain connecting pipe ( for pump ) Fresh air intake Electric control box Air filter ( optional ) air inlet from bottom side...

  • Page 30: Service Space

    Service Space Service Space Ensure enough space required for installation and maintenance. All the indoor units reserve the hole to joint the fresh air pipe. The hole size as following: Indoor Units...

  • Page 31: Static Pressure

    Static Pressure Static Pressure V4MDI-12 V4MDI-18 Indoor Units...
  • Page 32 Static Pressure V4MDI-24 Indoor Units...
  • Page 33 Static Pressure V4MDI-36 V4MDI-42, V4MDI-50, V4MDI-60 Indoor Units...

  • Page 34: Electric Characteristics

    Electric Characteristics Electric Characteristics Indoor Unit Power Supply Model Voltage Min. Max. V4MDI-12 220-240 V4MDI-18 220-240 V4MDI-24 220-240 V4MDI-36 220-240 V4MDI-42 220-240 V4MDI-50 220-240 V4MDI-60 220-240 Note: MFA: Max. Fuse Amps. (A) Indoor Units...

  • Page 35: Sound Levels

    Sound Levels Sound Levels Concealed Duct Type Discharge Suction Duct Duct 1.4m Microphone Noise level dB(A) Sound Power Model dB(A) V4MDI-12 V4MDI-18 V4MDI-24 V4MDI-36 V4MDI-42 V4MDI-50 V4MDI-60 Indoor Units...

  • Page 36: Accessories

    Accessories 7. Accessories Name Shape Quantity Soundproof / insulation sheath Tubing & Fittings Binding tape Seal sponge Drain joint Drainpipe Fittings (for cooling & heating) Seal ring Wired controller Wired controller & Its Frame Owner s manual ， Others Installation manual Magnetic ring (twist the electric wires L EMS &...

  • Page 37: The Specification Of Power

    The Specification of Power The Specification of Power 18000-24000Bt Model 12000 Btu/h 36000 Btu/h Phase 1-phase 1-phase Frequency and 220-240V, 220-240V, Voltage 50Hz 50Hz INDOOR POWER UNIT 3×1.0 3×1.0 WIRING (mm POWER CIRCUIT BREAKER/ 15/10 15/10 Fuse (A) Phase 1-phase 1-phase 1-phase Frequency and...

  • Page 38: Wiring Diagram

    Wiring Diagram Wiring Diagram V4MDI-12 V4MDI-18, V4MDI-24, V4MDI-42, V4MDI-50, V4MDI-60 Indoor Units...

  • Page 39: Wiring Diagram

    Wiring Diagram Indoor Units...

  • Page 40: Ceiling & Floor Type

    Ceiling & Floor Type Ceiling & Floor Type 1. Features ................40 2. Dimensions ..............41 3. Service Space ..............42 4. Electric Characteristics ..........43 5. Sound Levels ..............43 6. Air Velocity and Temperature Distributions (Reference Data) ................. 44 Accessories ..............

  • Page 41: Features

    Features 1. Features 1.1. New design, more modern and elegant appearance. 1.2. 1.2. Convenient installation --The ceiling type can be easily installed into a corner of the ceiling even if the ceiling is very narrow --It is especially useful when installation of an air c onditioner in the center of the ceiling is impossible due to a structure such as one lighting.

  • Page 42: Dimensions

    Dimens ions 2. Dimensions Wiring connection port Drain discharge port Fresh air intake Refrigerant pipe hole Hanging arm Capacity (Btu/h) V 4MKI-18 1068 V4MKI-24 V 4MKI-36 V4MKI-42 1650 1565 V4MKI-50 V4MKI-60 Indoor Units...

  • Page 43: Service Space

    Service Space 3. Service Space Indoor Units...

  • Page 44: Electric Characteristics

    Electric Characteristics 4. Electric Characteristics Indoor Units Power Supply Model a t l V4MKI-18 220-240 V4MKI-24 220-240 V4MKI-36 220-240 V4MKI-42 220-240 V4MKI-50 220-240 V4MKI-60 220-240 Note: MFA: Max. Fuse Amps. (A) . . 5 Sound Level Microphone 1.5m Air outlet side Microphone Noise level dB(A) Sound Power...

  • Page 45: Air Velocity And Temperature Distributions

    Air Velocity and Temperature Distributions (Reference Data) 6. Air Velocity and Temperature Distributions (Reference Data) Model: V4MKI-18, V4MKI-24 Ceiling installation: Discharge angle 17° Discharge angle 50° Indoor Units...
  • Page 46 Air Velocity and Temperature Distributions (Reference Data) Floor installation: Discharge angle 17° Discharge angle 50° Indoor Units...
  • Page 47 Air Velocity and Temperature Distributions (Reference Data) Model: V4MKI-36 Ceiling installation: Discharge angle 17° Discharge angle 50° Indoor Units...
  • Page 48 Air Velocity and Temperature Distributions (Reference Data) Floor installation: Discharge angle 17° Discharge angle 50° Indoor Units...
  • Page 49 Air Velocity and Temperature Distributions (Reference Data) Model: V4MKI-42, V4MKI-50, V4MKI-60 Ceiling installation: Discharge angle 17° Discharge angle 50° Indoor Units...
  • Page 50 Air Velocity and Temperature Distributions (Reference Data) Floor installation: Discharge angle 17° Discharge angle 50° Indoor Units...

  • Page 51: Accessories

    Accessories 8. Accessories Name Shape Quantity 1. Remote controller Remote controller & Its holder(The product you 2. Remote controller holder have might not be provided the following accessories) 3. Mounting screw (ST2.9×10-C-H) 4. Alkaline dry batteries (AM4) 5. Owner's manual Others 6.

  • Page 52: Field Wiring

    Wiring Diagram Field Wiring Indoor Units...
  • Page 53 Wiring Diagram 11. Wiring diagram V4MKI-18 Indoor Units...
  • Page 54 Ceiling & Floor Type V4MKI-24 V4MKI-36 Indoor Units...
  • Page 55 Wiring Diagram Indoor Units...

  • Page 56: Four-Way Cassette Type (Compact)

    Four-way Cassette Type (Compact) Four-way Cassette Type (Compact) 1. Features ................56 2. Dimensions ..............57 3. Service Space ..............58 4. Air Velocity and Temperature Distributions (Reference Data) ................. 59 5. Electric Characteristics ..........60 6. Sound Levels ..............60 7.

  • Page 57: Features

    Features 1. Features 1.1 New panel 360°surrounding air outlet design, a ords comfortable feeling Ø 1.2 Compact design The body size is 570×260×570mm, it’s just smaller than the ceiling board, so it’s very easy for Ø installation and will not damage the decora tion. The panel size is 647×50×647mm. The hooks are designed in the four corners of the body, which can save installation space.

  • Page 58: Dimensions

    Dimensions 2. Dimensions V4MCRI-12, V4MCRI-18 Liquid side Gas side Body Drain hole Wiring connection port ( for Service ) E-parts box 150 Distribution duct 4-Screw hole (for install panel) 4-install hanger Drain pipe Fresh air intake Wiring connection port Panel Indoor Units...

  • Page 59: Service Space

    Service Space 3. Service Space Indoor Units...

  • Page 60: Air Velocity And Temperature Distributions

    Air Velocity and Temperature Distributions (Reference Data) 4. Air Velocity and Temperature Distribution s (Reference Data) Airflow velocity Temperature Indoor Units...

  • Page 61: Electric Characteristics

    Electric Characteristics 5. Electric Characteristics Indoor Units Power Supply Model Voltage Min. Max. V4MCRI-12 220-240 V4MCRI-18 220-240 Note: MFA: Max. Fuse Amps. (A) 6. Sound Levels 1.4m Microphone Noise level dB(A) Model Noise Power dB(A) V4MCRI-12 V4MCRI-18 Indoor Units...

  • Page 62: Accessories

    Accessories 7. Accessories Name Shape Quantity Installation paper board Installation Fittings Soundproof / insulation sheath Tubing & Fittings Out-let pipe sheath Out-let pipe clasp Drainpipe Fittings Drain joint Seal ring Remote controller & Its Frame Remote controller & Its Remote controller holder Frame(The product you have might not be provided the following...
  • Page 63 Wiring Diagram 9. Field Wiring V4MCRI-12 V4MCRI-18 Indoor Units...
  • Page 64 Field Wiring 10. Field Wiring V4MCRI-12 V4MCRI-18 Indoor Units...

  • Page 65: Console Type

    Console Type Console Type 1. Features ................65 2. Dimensions ..............67 3. Service Space ..............68 4. Air Velocity and Temperature Distributions (Reference Data) ................. 69 5. Electric Characteristics ..........70 6. Sound Levels ..............71 7. Accessories ..............72 8.

  • Page 66: Features

    Features 1. Features 1.1. Modern and elegant appearance The simple and stylish designs can nicely harmonies with your living space.  1.2. Four panels optional 1.3. Two air-outlet ways Cooling mode Quick Cooling To maintain room temp Air outlet from top and bottom to make quick cooling ------When the A/C is just switched on, or room ...
  • Page 67 Console Type order to prevent cold air direct blowing, only the upper louver is opened in a high position, the lower louver closed. 1.4. Four air inlets 1.5. Low noise DC indoor fan motor, which has five speeds.  Low noise and energy saving. ...

  • Page 68: Dimensions

    Console Type 2. Dimensions Hanging arm 16 Drain pipe Unit: mm Console Type...

  • Page 69: Service Space

    Console Type 3. Service Space Console Type...

  • Page 70: Air Velocity And Temperature Distributions

    Console Type 4. Air Velocity and Temperature Distributions (Reference Data) Discharge angle 60 Airflow velocity Temperature Console Type...

  • Page 71: Electric Characteristics

    Console Type 5. Electric Characteristics Power Supply Indoor Units Model Voltage Min. Max. V4MLI-12, V4MLI-18 220-240 Console Type...

  • Page 72: Sound Levels

    Console Type 6. Sound Levels Microphone 1.5m Noise level dB(A) Noise Power Model dB(A) V4MLI-12, V4MLI-18 Console Type...

  • Page 73: Accessories

    7. Accessories Name Shape Quantity Installation fittings Hook Remote controller Frame Remote controller & Its Frame Mounting screw(ST2.9×10-C-H) Alkaline dry batteries (AM4) Others Owner's manual 8. The Specification of Power 12000 - 18000 Btu/h 20/16...

  • Page 74: Field Wiring

    Console Type 9. Field Wiring V4MLI-12, V4MLI-18 Console Type...
  • Page 75 Console Type 10. Field Wiring V4MLI-12, V4MLI-18 Console Type...
  • Page 76 M Floor-standing Type Floor-standing Type Features ..............76 Dimensions ..............77 Service Space ............. 78 Wiring Diagrams ............79 Electric Characteristics ..........80 Sound Levels .............. 81 Accessories ..............82 The Specification of Power ........83 Field Wiring ..............84 10.

  • Page 77: Features

    Features 1. Features 1.1 Fashionable design, concise and easy design better suits decoration style. 1.2. Dustproof Air Outlet When press OFF to turn off the unit, the air outlet louver can be closed automatically to prevent the dust falling in. 1.3.

  • Page 78: Dimensions

    Dimensions 2. Dimensions Dimension W(mm) D(mm) H(mm) Model 1700 V4MFI-24 Floor-standing Type...

  • Page 79: Service Space

    Service Space 3. Service Space Floor-standing Type...

  • Page 80: Wiring Diagrams

    Wiring Diagrams 4. Wiring Diagrams V4MFI-24 Floor-standing Type...

  • Page 81: Electric Characteristics

    Electric Characteristics 5. Electric Characteristics Indoor Units Power Supply Model Voltage Min. Max. V4MFI-24 220-240V 198V 254V Note: MFA: Max. Fuse Amps. (A) Floor-standing Type...

  • Page 82: Sound Levels

    Sound Levels 6. Sound Levels Microphone Noise level dB(A) Sound Power Model Level dB(A) V4MFI-24 49.5 43.5 Floor-standing Type...

  • Page 83: Accessories

    Accessories 7. Accessories Part Name Shape Quantity Safety Lock Self-tapping Screw 3.9×25 Flat Washers Bushing-Sleeve Cover Sound/Heat Insulation Sleeves Seal Drain joint Pipe - hole - protection Ring Remote Battery Remote Controller Remote controller manual User's manual Installation manual Remote controller holder(Optional parts) Ratproof board(on some models) Band(on some models) Drain Hose(on some models)

  • Page 84: The Specification Of Power

    The Specification of Power 8. The Specification of Power Model 24000Btu/h Phase 1-phase Frequency and Voltage 220-240V, 50Hz INDOOR UNIT POWER POWER WIRING (mm 3×1.0 CIRCUIT BREAKER 15/10 / Fuse (A) Phase 1-phase Frequency and Voltage 220-240V, 50Hz OUTDOOR UNIT POWER POWER WIRING (mm2) 3×2.5 CIRCUIT BREAKER...

  • Page 85: Field Wiring

    Field Wiring 9. Field Wiring Floor-standing Type...

  • Page 86: Wiring Diagram

    Wiring diagram 10. Wiring diagram V4MFI-24 Floor-standing Type...
  • Page 87 GA Floor-standing Type Floor-standing Type Features ..............87 Dimensions ..............88 Service Space ............. 89 Velocity Temperature Distributions (Reference Data)............90 Electric Characteristics ..........91 Sound Levels .............. 92 Accessories ..............93 The Specification of Power ........94 Field Wiring ..............95 10.

  • Page 88: Features

    Features Features 1.1. Fashionable design, more modern and elegant appearance. 1.2. Air Outlet Dustproof When turned off, the air outlet louver of the unit can be closed manually to prevent the dust falling in. 1.3. Simple and bright panel Adopts simple and bright style panel, Floor Standing series are suitable for most different space, and show in good taste.

  • Page 89: Dimensions

    Dimensions Dimensions Dimension W(mm) D(mm) H(mm) Mode V1MFI-50B, V1MFI-66B 1925 Floor-standing Type...

  • Page 90: Service Space

    Service Space Service Space Floor-standing Type...

  • Page 91: Air Velocity And Temperature Distributions

    Air Velocity and Temperature Distributions (Reference Data) 4. Air Velocity and Temperature Distributions (Reference Data) Model 50-66K： Airflow velocity Temperature Floor-standing Type...

  • Page 92: Electric Characteristics

    Electric Characteristics 5. Electric Characteristics Indoor Units Power Supply Model Voltage Min. Max. V1MFI-50B, V1MFI-66B 380-420V 342V 440V Note: MFA: Max. Fuse Amps. (A) Floor-standing Type...

  • Page 93: Sound Levels

    Sound Levels Sound Levels Microphone Noise level dB(A) Sound Power Model Level dB(A) V1MFI-50B, V1MFI-66B Floor-standing Type...

  • Page 94: Accessories

    Accessories Accessories Part Name Shape Quantity Safety Lock Self-tapping Screw 3.9×25 Flat Washers Bushing-Sleeve Cover Sound/Heat Insulation Sleeves Seal Drain joint Pipe - hole - protection Ring Remote Battery Remote Controller Connection Cables Remote controller manual User's manual Installation manual Floor-standing Type...

  • Page 95: The Specification Of Power

    The Specification of Power 8. The Specification of Power V1MFI-50B, V1MFI-66B Model Phase 3-phase Frequency and Voltage 380-420V, 50Hz INDOOR UNIT POWER Power Wiring (mm 5×1.5 Circuit Breaker (A) Phase 3-phase Frequency and Voltage 380-420V, 50Hz OUTDOOR UNIT POWER Power Wiring (mm 5×2.5 Circuit Breaker (A) Indoor/Outdoor Connecting Wiring (Weak Electric Signal)

  • Page 96: Field Wiring

    Field Wiring Field Wiring Floor-standing Type...
  • Page 97 Field Wiring Field Wiring V1MFI-50B, V1MFI-66B Floor-standing Type...
  • Page 98 Outdoor Units Part 3 Outdoor Units 1. Features ................56 2. Dimensions ..............57 3. Service Space ..............58 4. Air Velocity and Temperature Distributions (Reference Data) ................59 5. Electric Characteristics ..........60 6. Sound Levels ..............60 7. Accessories ..............61 8.

  • Page 99: Dimensions

    Dimensions 1. Dimensions Unit：mm Model(KBtu/h) 12/18 36/42 1030 Outdoor Units...
  • Page 100 Dimensions Unit：mm Model(KBtu/h) 50/60 1333 1045 Outdoor Units...

  • Page 101: Service Space

    Service Space 2. Service Space (Wall or obstacle) Air inlet More than 30cm More than 60cm More than 30cm Maintain channel Air inlet More than 60cm Air outlet More than 200cm Outdoor Units...

  • Page 102: Piping Diagrams

    Piping Diagrams 3. Piping Diagrams U4MRS-12, U4MRS-18, U4MRS-24 INDOOR OUTDOOR Electronic CAPILIARY TUBE expansion valve LIQUID SIDE 2-WAY VALVE T3 Condenser temp. sensor HEAT EXCHANGE (EVAPORATOR) HEAT T4 Ambient T1 Room temp. T2 Evaporator EXCHANGE temp. sensor sensor temp. sensor (CONDENSER) middle T2B Evaporator...

  • Page 103: Electric Characteristics

    4. Electric Characteristics U4MRS-12 U4MRS-18 U4MRS -24 U4MRS-36 U4MRT-42 U4MRT-50 U4MRT-60...

  • Page 104: Operation Limits

    Operation Limits 5. Operation Limits Temperature Cooling operation Heating operation Drying operation Mode Room temperature 17℃～32℃ 0℃～30℃ 17℃～32℃ 0℃～50℃ （-15℃～50℃：For Outdoor temperature -15℃～24℃ 0℃～50℃ the models with low temperature cooling system） CAUTION: 1. If the air conditioner is used beyond the above conditions, certain safety protection features may come into operation and cause the unit to operate abnormally.

  • Page 105: Sound Levels

    Sound Levels 6. Sound Levels Outdoor Unit Microphone 1.0m Note: H= 0.5 × height of out door unit Model Noise Power dB(A) Noise level dB(A) U4MRS-12 U4MRS-18 56.5 U4MRS-24 60.5 U4MRS-36 U4MRT-42 U4MRT-50 U4MRT-60 62.5 Outdoor Units...

  • Page 106: Wiring Diagram

    Wiring diagram 7. Wiring diagram U4MRS-12 U4MRS-18 Outdoor Units...
  • Page 107 Wiring diagram U4MRS-24 U4MRS-36 Outdoor Units...
  • Page 108 Wiring diagram U4MRT-42, U4MRT-50, U4MRT-60 Outdoor Units...
  • Page 109 Installation Part 4 Installation 1. Installation Procedure ........... 111 2. Location selection ............112 3. Indoor unit installation ..........113 4. Outdoor unit installation (Side Discharge Unit) ..130 5. Refrigerant pipe installation ......... 131 6. Drainage pipe installation ..........135 7.

  • Page 110: Installation Procedure

    Installation Procedure 1. Installation Procedure Indoor unit installation Outdoor unit installation location selection location selection Indoor unit installation Outdoor unit installation Refrigerant pipe Refrigerant pipe installation and insulation installation and insulation Drainage pipe installation Drainage pipe installation and insulation and insulation Vacuum drying and leakage checking Additional refrigerant charge Insulation the joint part of refrigerant pipe...

  • Page 111: Location Selection

    Location selection 2. Location selection 2.1 Indoor unit location selection  The place shall easily support the indoor unit’s weight.  The place can ensure the indoor unit installation and inspection.  The place can ensure the indoor unit horizontally installed. ...

  • Page 112: Indoor Unit Installation

    Indoor unit installation 3. Indoor unit installation 3.1 Super slim cassette indoor unit installation 3.1.1 Service space for indoor unit Model >235 24~42 >275 48/55 >317 3.1.2 Bolt pitch 3.1.3 Install the pendant bolt Select the position of installation hooks according to the hook holes positions showed in upper picture. Drill four holes of Ø12mm, 45~50mm deep at the selected positions on the ceiling.
  • Page 113 Indoor unit installation 3.1.4 Install the main body Make the 4 suspender through the 4 hanger of the main body to suspend it. Adjust the hexangular nuts on the four installation hooks evenly, to ensure the balance of the body. Use a leveling instrument to make sure the levelness of the main body is within ±1°.
  • Page 114 Indoor unit installation Remove the 4 corner covers. Hang the panel to the hooks on the mainbody. If the panel is with auto-lift grille, please watch the ropes lifing the grille, DO NOT make the ropes enwinded or blocked. Tighten the screws under the panel hooks till the panel closely stick on the ceiling to avoid condensate water.
  • Page 115 Indoor unit installation Hang the air-in grill to the panel, then connect the lead terminator of the swing motor and that of the control box with corresponding terminators on the body respectively. Install the 4 corner covers back. Note: The panel shall be installed after the wiring connected. Installation...
  • Page 116 Indoor unit installation 3.2 A5 duct indoor unit installation 3.2.1 Service space for indoor unit 3.2.2 Bolt pitch Size of outline dimension mounted plug Capacity(KBtu) 18/24 36~60 1240 3.2.3 Install the pendant bolt Select the position of installation hooks according to the hook holes positions showed in upper picture.
  • Page 117 Indoor unit installation 3.2.4 Install the main body Make the 4 suspender through the 4 hanger of the main body to suspend it. Adjust the hexangular nuts on the four installation hooks evenly, to ensure the balance of the body. Use a leveling instrument to make sure the levelness of the main body is within ±1°.
  • Page 118 Indoor unit installation 3.2.7 Change the air inlet direction ① Take off ventilation panel and flange, cut off the staples at side rail. ② Stick the attached seal sponge as per the indicating place in the following fig, and then change the mounting positions of air return panel and air return flange .
  • Page 119 Indoor unit installation 3.3 Ceiling & floor indoor unit installation 3.3.1 Service space for indoor unit 3.3.2 Bolt pitch ① Ceiling installation Capacity (KBtu/h) 18/24 36~60 1565 ② Wall-mounted installation 3.3.3 Install the pendant bolt ① Ceiling installation Select the position of installation hooks according to the hook holes positions showed in upper picture.
  • Page 120 Indoor unit installation Drill four holes of Ø12mm, 45~50mm deep at the selected positions on the ceiling. Then embed the expansible hooks (fittings). ② Wall-mounted installation Install the tapping screws onto the wall.(Refer to picture below) 3.3.4 Install the main body ①...
  • Page 121 Indoor unit installation Put the side panels and grilles back. ② Wall-mounted installation Hang the indoor unit by insert the tapping screws into the hanging arms on the main unit. (The bottom of body can touch with floor or suspended, but the body must install vertically.) Installation...
  • Page 122 Indoor unit installation 3.4 Compact cassette indoor unit installation 3.4.1 Service space for indoor unit 3.4.2 Bolt pitch 3.4.3 Install the pendant bolt Select the position of installation hooks according to the hook holes positions showed in upper picture. Drill four holes of Ø12mm, 45~50mm deep at the selected positions on the ceiling. Then embed the expansible hooks (fittings).
  • Page 123 Indoor unit installation If the ceiling is extremely high, please determine the length of the installation hook depending on the real situation. 3.4.4 Install the main body Make the 4 suspender through the 4 hanger of the main body to suspend it. Adjust the hexangular nuts on the four installation hooks evenly, to ensure the balance of the body.
  • Page 124 Indoor unit installation Hang the panel to the hooks on the mainbody. Tighten the screws under the panel hooks till the panel closely stick on the ceiling to avoid condensate water. Hang the air-in grill to the panel, then connect the lead terminator of the swing motor and that of the control box with corresponding terminators on the body respectively.
  • Page 125 Indoor unit installation 3.5 Console indoor unit installation 3.7.7 Service space for indoor unit 3.7.8 Install the main body Fix the hook with tapping screw onto the wall  Hang the indoor unit on the hook.  (The bottom of body can touch with floor or suspended, but the body must install vertically.) Installation...
  • Page 126 Indoor unit installation 3.6 Floor standing indoor unit installation 3.6.1 Service space for indoor unit a. A place which provides the spaces around the indoor unit as required above in the diagram. b. A place where is no obstacle near the inlet and outlet area. c.
  • Page 127 Indoor unit installation 3.6.2.3. Take the Pipe Clip off before connecting the pipes and wiring; fit it when these finished. Use accessories to connect the pipes/wires on both sides and back side. 3.7 Floor standing indoor unit installation 3.7.1 Service space for indoor unit a.

  • Page 128: Part 4 Installation

    Indoor unit installation 3.7.2 Installing 3.7.2.1. Anti-falling; To prevent the indoor unit from falling, you must: a. Pay full attention to the unit because its long outer shape makes it easy to fall; b. Firmly fix the unit to the wall or in the ground to avoid accidental falling. 3.7.2.2.

  • Page 129: Outdoor Unit Installation (Side Discharge Unit)

    Outdoor unit installation (Side Discharge Unit) 4. Outdoor unit installation (Side Discharge Unit) 4.1 Service space for outdoor unit (Wall or obstacle) Air inlet More than 30cm More than 60cm More than 30cm Maintain channel Air inlet More than 60cm Air outlet More than 200cm 4.2 Bolt pitch...

  • Page 130: Refrigerant Pipe Installation

    Refrigerant pipe installation Model 12/18 30~42 48/55 4.3 Install the Unit Since the gravity center of the unit is not at its physical center, so please be careful when lifting it with a sling. Never hold the inlet of the outdoor unit to prevent it from deforming. Do not touch the fan with hands or other objects.
  • Page 131 Refrigerant pipe installation 5.2.5 Insulate the copper pipe Before test operation, the joint parts should not be heat insulated.  5.2.6 Flare the pipe Insert a flare nut into the pipe before flaring the pipe  According to the following table to flare the pipe ...

  • Page 132: Drainage Pipe Installation

    Drainage pipe installation 6. Drainage pipe installation Install the drainage pipe as shown below and take measures against condensation. Improperly installation could lead to leakage and eventually wet furniture and belongings. 6.1 Installation principle Ensure at least 1/100 slope of the drainage pipe ...
  • Page 133 Drainage pipe installation 6.2.3 Individual design of drainage pipe system The drainage pipe of air conditioner shall be installed separately with other sewage pipe, rainwater pipe  and drainage pipe in building. The drainage pipe of the indoor unit with water pump should be apart from the one without water pump. ...
  • Page 134 Drainage pipe installation Indoor unit More than 50mm Plug More than 25mm Water storage pipe 6.2.7 Lifting pipe setting of indoor unit with water pump The length of lifting pipe should not exceed the pump head of indoor unit water pump. ...
  • Page 135 Drainage pipe installation 6.3 Drainage test 6.3.1 Water leakage test After finishing the construction of drainage pipe system, fill the pipe with water and keep it for 24 hours to check whether there is leakage at joint section. 6.3.2 Water discharge test Natural drainage mode(the indoor unit with outdoor drainage pump) Infuse above 600ml water through water test hole slowly into the water collector, observe whether the water can discharge through the transparent hard pipe at drainage outlet.

  • Page 136: Vacuum Drying And Leakage Checking

    Vacuum Drying and Leakage Checking 7. Vacuum Drying and Leakage Checking 7.1 Purpose of vacuum drying Eliminating moisture in system to prevent the phenomena of ice-blockage and copper oxidation.  Ice-blockage shall cause abnormal operation of system, while copper oxide shall damage compressor. Eliminating the non-condensable gas (air) in system to prevent the components oxidizing, pressure ...

  • Page 137: Additional Refrigerant Charge

    Additional refrigerant charge 8. Additional refrigerant charge After the vacuum drying process is carried out, the additional refrigerant charge process need to be  performed. The outdoor unit is factory charged with refrigerant. The additional refrigerant charge volume is decided ...

  • Page 138: Engineering Of Insulation

    Engineering of insulation 9. Engineering of insulation 9.1 Insulation of refrigerant pipe 9.1.1 Operational procedure of refrigerant pipe insulation Cut the suitable pipe → insulation (except joint section) → flare the pipe → piping layout and connection→ vacuum drying → insulate the joint parts 9.1.2 Purpose of refrigerant pipe insulation During operation, temperature of gas pipe and liquid pipe shall be over-heating or over-cooling ...

  • Page 139: Engineering Of Electrical Wiring

    Engineering of electrical wiring 9.2.3 Insulation material selection for drainage pipe The insulation material should be flame retardant material, the flame retardancy of the material should  be selected according to the local law. Thickness of insulation layer is usually above 10mm. ...

  • Page 140: Test Operation

    Test operation 11. Test operation 11.1 The test operation must be carried out after the entire installation has been completed. 11.2 Please confirm the following points before the test operation. The indoor unit and outdoor unit are installed properly.  Tubing and wiring are correctly completed.
  • Page 141 Electrical Control System Part 5 Electrical Control System Electrical Control Function ........145     Troubleshooting ............155     Controller ..............184     Electrical Control System...

  • Page 142: Main Protection

    Electrical Control Function 1. Electrical Control Function 1.1 Definition T1: Indoor room temperature T2: Coil temperature of indoor heat exchanger middle. T2B: Coil temperature of indoor heat exchanger outlet. T3: Coil temperature of condenser T4: Outdoor ambient temperature T5: Compressor discharge temperature 1.2 Main Protection 1.2.1 Time delay at restart for compressor.

  • Page 143: Operation Modes And Functions

    Electrical Control Function 1.3 Operation Modes and Functions 1.3.1 Fan mode (1) Outdoor fan and compressor stop. (2) Temperature setting function is disabled, and no setting temperature is displayed. (3) The louver operates same as in cooling mode. (4) Auto fan: T 1 - 2 4 6 .
  • Page 144 Electrical Control Function 18~60K 1.3.2.3 Indoor fan running rules In cooling mode, indoor fan runs all the time and the speed can be selected as high, medium, low, auto and silent. When the compressor is running, the indoor fan is controlled as below: Setting fan T1-Td ℃(°F) Actual fan speed...
  • Page 145 Electrical Control Function 1.3.2.4 Condenser high temperature T3 protection 18~60K Decrease Decrease Hold Hold Resume Increase slowly Resume 1.3.3 Heating Mode 1.3.3.1 Outdoor fan running rules: F re q u e n c y lin k a g e a re a Frequency linkage area: 18~60K: 1.3.3.2 Indoor fan running rules:...
  • Page 146 Electrical Control Function When the compressor is running, the indoor fan is controlled as below: Setting fan T1-Td℃ Actual fan speed speed H-（H-=H-G) H（=H） H+(H+=H+G) M-(M-=M-Z) M(M=M) M+(M+=M+Z) L-(L-=L-D) L(L=L) L+(L+=L+D) If the compressor stops caused by the room temperature rising, the indoor fan will be forced to run 127 seconds with breeze.
  • Page 147 Electrical Control Function 1.3.3.4 High evaporator coil temp.T2 protection: TEstop Decrease TEdown Hold TEnorm Resume Off: Compressor stops. Decrease: Decrease the running frequency to the lower level. Hold: Keep the current frequency. Resume: No limitation for frequency. 1.3.4 Auto-mode This mode can be chosen with remote controller and the setting temperature can be changed between 17~30℃.
  • Page 148 Electrical Control Function 1.3.6.3 Timer off. The machine will turn off automatically when reaching the setting time. 1.3.6.4 Timer on/off. The machine will turn on automatically when reaching the setting “on” time, and then turn off automatically when reaching the setting “off” time. 1.3.6.5 Timer off/on.
  • Page 149 Electrical Control Function controller, the buzzer will emit a sound and this indicates the follow me function is initiated. But when the indoor PCB receives signal which sent from remote controller every 3 minutes, the buzzer will not respond. When the unit is running with follow-me function, the PCB will control the unit according to the temperature from follow-me signal, and the temperature collection function of room temperature sensor will be shielded.
  • Page 150 Electrical Control Function display tube will show “70”. If the indoor unit is not connected, Condenser pipe temp.(T3) the digital display tube will show: “――” Outdoor ambient temp.(T4) The display value is between 0~129 degree.If the temp. is higher than 99 degree, the digital display tube will show single digit and tens digit.
  • Page 151 Electrical Control Function If the temp. is lower than 0 degree, the digital display tube will show “0”.If the temp. is higher than 70 degree, the digital Indoor room temp. of 2# indoor unit display tube will show “70”. If the capacity demand is 0, , the digital display tube will show “0.
  • Page 152 Troubleshooting 2. Troubleshooting 2.1 Display board 2.1.1 Icon explanation on indoor display board (Super slim cassette). 2.1.2 Icon explanation on indoor display board (Duct) PRE-DEF indicator(cooling and heating type) or fan only indicator(cooling only type) Alarm indicator Timer indicator Infrared signal receiver Operation lamp Display digital tube Temporary button...
  • Page 153 Troubleshooting 2.1.5 Icon explanation on indoor display board (Compact cassette). 2.1.6 Icon explanation on indoor display board (Console) 2.1.7 Display board of Floor-standing Electrical Control System...
  • Page 154 Troubleshooting 2.1.8 Display board of Floor-standing Electrical Control System...
  • Page 155 Troubleshooting 2.2 Indoor unit malfunction For Console Operation Lamp Malfunction Timer Lamp (flashes) Indoor EEPROM malfunction Communication malfunction between indoor and outdoor units Indoor fan speed has been out of control Open or short circuit of T1 temperature sensor Open or short circuit of T2 temperature sensor Refrigerant leakage detection Overcurrent protection (For some units) Open or short circuit of T4 temperature sensor...
  • Page 156 Troubleshooting Floor standing Malfunction Error Code Indoor EEPROM malfunction Communication malfunction between indoor and outdoor units Indoor fan speed has been out of control Open or short circuit of T1 temperature sensor Open or short circuit of T2 temperature sensor Refrigerant leakage detection Water level alarm Communication error between master and slave unit (for twins system)
  • Page 157 Troubleshooting IPM module malfunction ☆ Over voltage or over low voltage protection ☆ High temperature protection of top of compressor ☆ Too low ambient temperature protection ☆ Error rotor position protection of compressor ☆ Mode conflict (For free-match indoor units) ☆...
  • Page 158 Troubleshooting 2.3 Outdoor unit malfunction For 18~60K: Display Malfunction or Protection Communication malfunction between indoor and outdoor units Overcurrent protection Ambient temperature sensor (T4) is malfunction Outdoor heat-exchanger temperature sensor (T3) is malfunction Discharge temperature sensor (T5) is malfunction Outdoor EEPROM is malfunction Outdoor fan speed has been out of control IPM module protection Voltage protection (too high or too low)
  • Page 159 Troubleshooting 2.4 Solving steps for typical malfunction 2.4.1 For the indoor unit 2.4.1.1 Open or short circuit of temperature sensor Check the connections  between temperature  Correct the connections. sensor and PCB. Are the  connections good? Measure the resistance value  of the sensor via Appendix 1 Is it normal? Replace the sensor. Replace the indoor PCB  2.4.1.2. Outdoor unit malfunction Electrical Control System...
  • Page 160 Troubleshooting 2.4.1.3. Indoor EEPROM malfunction EEPROM: An electrically erasable programmable read-only memory whose contents can be erased and reprogrammed using a pulsed voltage. 2.4.1.4. Water-level alarm malfunction Electrical Control System...
  • Page 161 Troubleshooting 2.4.1.5. Indoor fan speed has been out of control. Index 1: 1. Indoor DC fan motor(control chip is inside fan motor) Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor connector.

  • Page 162: Part 5 Electrical Control System

    Troubleshooting 2.4.1.6. Refrigerant Leakage Detection Shut off the power supply and turn it on 2 minutes later. Is it still displaying the error code? Check if T2 sensor is well Is there cool air blowing fixed. Correct the installation or replace T2 sensor. Does out from indoor air outlet? the problem remain again? Is there any leakage? Especially...
  • Page 163 Troubleshooting 2.4.2 For the super-slim cassette with up-down panel 2.4.2.1 Communication error between indoor unit and up-down panel 2.4.2.2 Up-down panel is defective Electrical Control System...
  • Page 164 Troubleshooting 2.4.3 For the unit with TWINS function (For the super-slim cassette & duct) 2.4.3.1 Communication between master unit and indoor unit malfunction 2.4.3.2 Other malfunction between master unit and indoor unit One indoor unit displays ”E9”, which means another indoor unit is faulty. Check another indoor unit’s error code and then follow the appropriate solutions to solve the malfunction.
  • Page 165 Troubleshooting 2.4.4 For the outdoor unit 2.4.4.1. F4 malfunction E0 display Outdoor EEPROM malfunction Power off, then restart the unit 2 minutes later Replace the outdoor main PCB EEPROM: An electrically erasable programmable read-only memory whose contents can be erased and reprogrammed using a pulsed voltage. Electrical Control System...
  • Page 166 Troubleshooting 2.4.4.2. E1 malfunction For current loop communication: Electrical Control System...
  • Page 167 Troubleshooting For 485 communication E2 display Communication malfunction between indoor and outdoor units Power off, then restart the unit 2 minutes later Check whether there’s any interference. Remove interference or Such as too many lamps, power add magnet ring on power transformers? Or the signal wire wire is too long?
  • Page 168 Troubleshooting 2.4.4.3. J4 malfunction Electrical Control System...
  • Page 169 Troubleshooting 2.4.4.4. F1, F2, F3 malfunction Error E4 display Judge 1: Outdoor condenser temp. sensor (T3) is malfunction Check whether the wiring of the  condenser temp. sensor(T3) is  Connect the wiring well broken off Check whether the resistance of  condenser temp. sensorT3) is wrong  Replace condenser temp. sensor(T3) refer to the Appendix 1 Judge 2: Outdoor ambient temp. sensor (T4) is malfunction Check whether the wiring of the  outdoor ambient temperature  Connect the wiring well sensor (T4) is broken off Check whether the resistance of  outdoor ambient temperature  Replace outdoor ambient  sensor (T4) is wrong refer to the  temperature sensor (T4) Appendix 1 Judge 3: Compressor discharge temp. sensor (T5) is malfunction Check whether the wiring of the  compressor discharge temperature  Connect the wiring well sensor (T5) is broken off Check whether the resistance of ...
  • Page 170 Troubleshooting 2.4.4.5. P6 malfunction E5 display Voltage protection of compressor Check whether the power Restart the unit when the power voltage is normal. supply gets normal Check the wiring of Measure whether outdoor power wires well or Reconnect it well terminal voltage is normal？...
  • Page 171 Troubleshooting 2.4.4.6. F5 malfunction The same as E3 in indoor. 2.4.4.7. J5 malfunction Electrical Control System...
  • Page 172 Troubleshooting 2.4.4.8. J6 malfunction P2 display Low pressure protection Whether the wiring between the low pressure protector and main control Connect it well board is connected well or correctly Whether the low pressure protector is broken Method: Disconnect the plug. Measure the resistance of the low pressure protector.
  • Page 173 Troubleshooting 2.4.4.9. F0 malfunction P3 display Current protection of compressor The protection occurred in standby Check whether the power Restart the unit when the power voltage is normal. supply gets normal Check the wiring of Measure whether outdoor power wires well or Reconnect it well terminal voltage is normal？...
  • Page 174 Troubleshooting 2.4.4.10. J2 malfunction When compressor discharge temperature is higher than 115°C, the unit will stop, and unit runs again when compressor discharge temperature is lower than 90°C. P4 display Temperature protection of  compressor discharge Check whether the  Check whether the  compressor discharge temp. is  Stop leaking and add refrigerant refrigerant is leak more than 115°C ? Check whether connection is right between compressor discharge temp.
  • Page 175 Troubleshooting 2.4.4.11. J1 malfunction When condenser high temp. is more than 65°C, the unit will stop, and unit runs again when outdoor pipe temp. less than 52°C. P5 display Check the connection  between temperature  Correct the connection High temperature protection of  sensor and PCB. condenser Check whether the condenser temperature is Check whether the Higher than 65°C resistance of condenser...
  • Page 176 Troubleshooting 2.4.4.12. P0 malfunction At first test the resistance between every two ports of U, V, W of IPM and P, N. If any result of them is 0 or close to 0, the IPM is defective. Otherwise, please follow the procedure below: P6 display IPM module protection Check whether the power voltage...
  • Page 177 Troubleshooting 2.4.4.13. J0 malfunction Electrical Control System...
  • Page 178 Troubleshooting Appendix 1 Temperature Sensor Resistance Value Table (℃--K) ℃ ℃ ℃ ℃ K Ohm K Ohm K Ohm K Ohm 12.6431 2.35774 0.62973 115.266 108.146 12.0561 2.27249 0.61148 101.517 11.5000 2.19073 0.59386 96.3423 10.9731 2.11241 0.57683 89.5865 10.4736 2.03732 0.56038 84.2190 10.000...
  • Page 179 Troubleshooting Appendix 2 Unit: ℃ ---K Discharge temp. sensor table 542.7 68.66 13.59 3.702 511.9 65.62 13.11 3.595 62.73 12.65 3.492 455.9 59.98 12.21 3.392 430.5 57.37 11.79 3.296 406.7 54.89 11.38 3.203 384.3 52.53 10.99 3.113 363.3 50.28 10.61 3.025 343.6 48.14...
  • Page 180 Troubleshooting Appendix 3 Normal voltage of P and N 208-240V(1-phase,3-phase) 380-420V(3-phase) In standby 310VDC around 530VDC around In operation With passive PFC With partial active With fully active module PFC module PFC module >200VDC >310VDC >370VDC >450VDC Electrical Control System...
  • Page 181 Controller 3. Controller 3.1Wireless Remote Controller 3.1.1RG51Q1/BGE General Function for wireless remote controller: Model RG51Q1/BGE Rated voltage 3.0V(2pieces of LR03 7 ＃ batteries) Min voltage for sending signal of CPU 2.4V Effective receiving distance 8m~11m Operation condition -5~60 ℃ Electrical Control System...
  • Page 182 Controller Buttons and functions : Decrease the set temp. Keeping pressing will decrease the temp with 1℃ per 0.5s. 1. Adjust : Increase the set temp. Keeping pressing will increase the temp with 1℃ per 0.5s. 2. Adjust 3. MODE: Once pressing, running mode will be selected in the following sequence: AUTO COOL HEAT...
  • Page 183 Controller 3.1.2 RG51C/E Remote Controller Specifications Model RG51C/E Rated Voltage 3.0V(2pieces of LR03 7 ＃ batteries) Lowest Voltage of CPU Emitting Signal 2.0V Reaching Distance 8m (when using 3.0 voltage, it can get 11m) Environment Temperature Range -5 ℃～ 60 ℃ Introduction of Function Buttons on the Remote Controller SET TEM PERATURE( C) AU TO...
  • Page 184 Controller controls into faceplate setting state and the LCD shows F2.Press the TEMPUP( ) to control the faceplate up and press the TEMP DOWN( ) to control the faceplate down. Press any button to exit the faceplate setting state, then the LCD back to the normal display. 7.
  • Page 185 Controller 3.1.3 R51M/(C)E Remote Controller Specifications Model R51M/(C)E Rated Voltage 3.0V Reaching Distance Environment Temperature Range -5 ℃～ 60 ℃ Introduction of Function Buttons on the Remote Controller : Decrease the set temp. Keeping pressing will decrease the temp with 1℃ per 0.5s. 1.
  • Page 186 Controller AUTO HIGH 9. ON/OFF: For turning on or turning off the air conditioner 10. TIME ON: For time ON setting. Once pressing this button, the time will increase by 0.5 hour. When the set time exceeds 10 hours, pressing the button will increase the time by 1 hour. Adjusting the figure to 0.00 will cancel time ON setting.
  • Page 187 Controller 3.2 Wired Remote Controller 3.2.1 Name and functions of buttons on the wire controller Mode button: When press this button, the operation mode change as the following sequence: AUTO COOL HEAT Remark: For the cooling only model, the heating mode is skipped. Timer on button: Press this button, timer on function is active.
  • Page 188 Controller Adjust button: Set indoor temperature up. If press and hold on, it will increase at 1degree per 0.5 second. Adjust button: Set indoor temperature down. if press and hold on, it will decrease at 1degree per 0.5 Second. 10. Swing button: First press, start swing function; second press, stop swing. (Match to some model with swing function).
  • Page 189 Controller The wired controller will reset to factory setting with auto mode, auto fan and 24℃ setting temperature when the air conditioner restarts after power failure. And this may cause inconsistent displays on the wired controller and on the air conditioner. You need to readjust the running status through the wired controller.
  • Page 190 AIR CONDITIONING SYSTEMS LCAC Scan here to download the latest version of this manual. Σαρώστε εδώ για να κατεβάσετε την τελευταία έκδοση του εγχειριδίου.

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