Lennox LIUH018021T431E-1 Service Manual
  1. Manuals
  2. Brands
  3. Lennox Manuals
  4. Air Conditioner
  5. LIUH018021T431E-1
  6. Service manual

Lennox LIUH018021T431E-1 Service Manual

Hide thumbs Also See for LIUH018021T431E-1:
Table of Contents

Advertisement

Quick Links

Service Manual
LIUH018021T431E-1
LIUH024021T431E-1
LIUH036021T431E-1
LIUH048021T431E-1
LIUH060021T431E-1
LIFHC012021T431E-1
LIFHC018021T431E-1
LIFHC024021T431E-1
LIFHC036021T431E-1
LIFHC048021T431E-1
LIFHC060021T431E-1
LICH4012021T431E-1
LICH4018021T431E
LICH4024021T431E-1
LICH4036021T431E-1
LICH4048021T431E-1
LICH4060021T431E-1
LIHP012000T431E
LIHP018000T431E
LIHP024000T431E
LIHP036000T431E
LIHP036000M431E
LIHP048000T431E
LIHP048000M431E
LIHP060000M431E
Thank you for selecting LENNOX air conditioners.

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the LIUH018021T431E-1 and is the answer not in the manual?

Questions and answers

Related Manuals for Lennox LIUH018021T431E-1

Summary of Contents for Lennox LIUH018021T431E-1

  • Page 1 Service Manual LICH4012021T431E-1 LIUH018021T431E-1 LICH4018021T431E LIUH024021T431E-1 LICH4024021T431E-1 LIUH036021T431E-1 LICH4036021T431E-1 LIUH048021T431E-1 LICH4048021T431E-1 LIUH060021T431E-1 LICH4060021T431E-1 LIFHC012021T431E-1 LIHP012000T431E LIFHC018021T431E-1 LIHP018000T431E LIFHC024021T431E-1 LIHP024000T431E LIFHC036021T431E-1 LIHP036000T431E LIHP036000M431E LIFHC048021T431E-1 LIHP048000T431E LIFHC060021T431E-1 LIHP048000M431E LIHP060000M431E Thank you for selecting LENNOX air conditioners.
  • Page 2 Contents Part 1 General Information ....................1 Part 2 Indoor Units ......................... 4 Part 3 Outdoor Units ......................63 Part 4 Installation ......................... 76 Part 5 Electrical Control System ..................106 ※The specifications, designs, and information in this book are subject to change without notice for product improvement.
  • Page 3 General Information Part 1 General Information 1. Model Lists ................... 2 2. External Appearance ................3 2.1 Indoor Units ....................... 3 2.2 Outdoor Units ......................3 General Information...

  • Page 4: Model Lists

    Indoor Units 1. Model Lists 1.1 Indoor Units R410A (capacity multiplied by 1000Btu/h) Type Function Super slim cassette Cooling and heating ● ● ● ● A6 Duct Cooling and heating ● ● ● ● ● ● Ceiling-floor Cooling and heating ●...

  • Page 5: External Appearance

    Indoor Units 2. External Appearance 2.1 Indoor Units Duct Super slim cassette Ceiling-Floor Compact Four-way cassette 2.2 Outdoor Units Single fan outdoor unit Double fan outdoor unit Indoor Units...
  • Page 6 Indoor Units Part 2 Indoor Units Super Slim Cassette Type ............ 5 A6 Duct Type ..............20 Ceiling & Floor Type ............38 Four-way Cassette Type (Compact) ......... 53 Indoor Units...

  • Page 7: Table Of Contents

    Super Slim Cassette Type Super Slim Cassette Type 1. Features ................6 2. Dimensions ..............9 3. Service Space ..............10 4. Wiring Diagrams ............11 5. Air Velocity Distributions (Reference Data) ....12 6. Electric Characteristics ..........15 7. Sound Levels ..............16 8.

  • Page 8: Features

    Features 1. Features 1.1 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) Fresh air intake function ➢...
  • Page 9 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. 1.6 Terminals for alarm lamp and long-distance on-off controller connection are standard ➢...
  • Page 10 Features Alarm lamp Long-distance on-off controller 1.7 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 11: Dimensions

    Dimensions 2. Dimensions 92 92 Fresh air intake 4-install hanger Body Gas side Liquid side Wiring connection port E-parts box Service hole for Test mouth & Test cover draining pump Drain hole 92 92 92 92 Panel Unit: mm Model(kBtu/h) 24~36 48~60 Indoor Units...

  • Page 12: Service Space

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

  • Page 13: Wiring Diagrams

    Wiring Diagrams 4. Wiring Diagrams Indoor Units...

  • Page 14: Air Velocity Distributions (Reference Data)

    Air Velocity Distributions (Reference Data) Air Velocity Distributions (Reference Data) 24K: Cooling: Heating: Indoor Units...
  • Page 15 Air Velocity Distributions (Reference Data) 36K: Cooling: Heating: Indoor Units...
  • Page 16 Air Velocity Distributions (Reference Data) 48-60K： Cooling: Heating: Indoor Units...

  • Page 17: Electric Characteristics

    Electric Characteristics Electric Characteristics Indoor Unit Power Supply Model Voltage LICH4024021T431E-1 220-240V 198V 254V LICH4036021T431E-1 220-240V 198V 254V LICH4048021T431E-1 220-240V 198V 254V LICH4060021T431E-1 220-240V 198V 254V Notes: MFA: Max. Fuse Amps. (A) Indoor Units...

  • Page 18: Sound Levels

    Sound Levels Sound Levels 1.4m Microphone Noise level dB(A) Noise Power dB(A) Model LICH4024021T431E-1 LICH4036021T431E-1 LICH4048021T431E-1 LICH4060021T431E-1 Indoor Units...

  • Page 19: Accessories

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

  • Page 20: The Specification Of Power

    The Specification of Power 9. The Specification of Power Model(Btu/h) 24000 36000 36000 Phase 1-phase 1-phase 3-phase Frequency 220-240V, 50Hz 220-240V, 50Hz 380-415V, 50Hz POWER Voltage POWER WIRING 3×2.5 3×4.0 5×2.5 (mm2) CIRCUIT BREAKER/Fuse (A) 30/20 40/30 30/20 Indoor/Outdoor Connecting Wiring 2×0.2 2×0.2 2×0.2...

  • Page 21: Field Wiring

    Field Wiring 10. Field Wiring Indoor Units...
  • Page 22 A6 Duct Type A6 Duct Type 1. Features ................21 2. Dimensions ..............24 3. Service Space ..............25 4. Wiring Diagrams ............26 5. Static Pressure ............... 27 6. Electric Characteristics ..........33 7. Sound Levels ..............34 8. Accessories ..............35 9.

  • Page 23: Features

    Features Features 1.1 Higher Static Pressure ➢ As a ducted air conditioner with medium static pressure, it has the widest static pressure range. ➢ The maximum static pressure reaches 160 Pa 1.2 Slim Design ➢ The industry lowest height is designed to be fitted into tight roof spaces. *18K unit - 210mm,24K/36K unit - 249mm，48K unit -300mm Constant air volume control ➢...
  • Page 24 Features Air intake from bottom (Optional) Air intake from rear (Standard) 1.5 Communication wire connection ➢ A6 duct uses two wires without polarity connection way, which almost has no mistake during the installation. 1.6 Easy Clean ➢ With a larger window design, once the motor and the blower wheels have been detached, heat exchanger and water receiver tray in behind can be seen very clearly.
  • Page 25 Features 1.8 Built-in drain pump (Optional) ➢ Built-in drain pump can lift the water to 750mm upmost, which widens the drainage piping range. Indoor Units...

  • Page 26: Dimensions

    Dimensions Dimensions Model unit (KBtu/h) inch 27.6 19.9 17.7 21.1 23.6 29.2 14.2 inch 34.65 8.27 26.54 23.62 5.51 27.80 1.97 5.35 30.79 7.48 1.57 36.22 20.00 3.07 5.83 3.46 4.41 1100 1001 1140 inch 43.31 9.80 30.47 27.56 5.51 36.46 1.97 6.89...

  • Page 27: Service Space

    Service Space Service Space Ensure enough space required for installation and maintenance. Indoor Units...

  • Page 28: Wiring Diagrams

    Wiring Diagrams Wiring Diagrams 18k~60k Indoor Units...

  • Page 29: Static Pressure

    Static Pressure Static Pressure LIFHC012021T431E-1 Air flow rate(m3/h ) （ no filter ） 1200 1100 PS ： SP4 M==SP3 H 1000 External Static Pressure （ pa ） External Static Pressure (Pa) Indoor Units...
  • Page 30 Static Pressure LIFHC018021T431E-1 Air flow rate （ m3/h ） （ no filter ） 2000 1800 1600 1500 1400 1200 1000 External Static Pressure （ pa ） 10 20 25 30 40 50 60 70 80 90 100 110 120 130 140 150 160 1200 1000 External Static Pressure（pa）...
  • Page 31 Static Pressure LIFHC024021T431E-1 Air flow rate(m3/h ) （ no filter ） 2400 2200 2000 1800 1600 1400 1200 1000 External Static Pressure （ pa ） 10 20 25 30 40 50 60 70 80 90 100 110 120 130 140 150 160 1800 1600 1400...
  • Page 32 Static Pressure LIFHC036021T431E-1 Air flow rate(m3/h ) （ no filter ） 3200 3000 2800 2600 2500 2400 2200 2000 1800 1600 1400 1200 1000 External Static Pressure （ pa ） 10 20 25 30 40 50 60 70 80 90 100 110 120 130 140 150 160 2500 2000 1500...
  • Page 33 Static Pressure LIFHC048021T431E-1 Air flow rate(m3/h ) （ no filter ） 4800 4400 4000 3600 3200 3100 2800 2400 2000 1600 1500 1200 External Static Pressure （ pa ） 10 20 25 30 40 50 60 70 80 90 100 110 120 130 140 150 160 2500 2000 1500...
  • Page 34 Static Pressure LIFHC060021T431E-1 Air flow rate(m3/h ) （ no filter ） 4800 4400 4000 3600 3200 3100 2800 2400 2000 1600 1500 1200 External Static Pressure （ pa ） 20 25 30 40 50 60 70 80 90 100 110 120 130 140 150 160 3500 3000 2500...

  • Page 35: Electric Characteristics

    Electric Characteristics 6. Electric Characteristics Indoor Unit Power Supply Model Voltage Min. Max. LIFHC012021T431E-1 220-240V 198V 254V LIFHC018021T431E-1 220-240V 198V 254V LIFHC024021T431E-1 220-240V 198V 254V LIFHC036021T431E-1 220-240V 198V 254V LIFHC048021T431E-1 220-240V 198V 254V LIFHC060021T431E-1 220-240V 198V 254V Note: MFA: Max. Fuse Amps. (A) Indoor Units...

  • Page 36: 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) LIFHC012021T431E-1 LIFHC018021T431E-1 LIFHC024021T431E-1 LIFHC036021T431E-1 LIFHC048021T431E-1 LIFHC060021T431E-1 Indoor Units...

  • Page 37: Accessories

    Accessories 8. Accessories Name Shape Quantity Tubing & Fittings Soundproof / insulation sheath Drain joint Drainpipe Fittings (for cooling & heating) Seal ring Magnetic ring EMC & It’s Fitting (twist the electric wires L and N around (for some models) the magnetic ring to five circles) Wired controller Wired controller &...

  • Page 38: The Specification Of Power

    The Specification of Power The Specification of Power Model(Btu/h) 12000 18000-24000 36000 36000 Phase 1-phase 1-phase 1-phase 3-phase Frequency and 220-240V, 220-240V, 220-240V, 380-415V, POWER Voltage 50Hz 50Hz 50Hz 50Hz POWER 3×2.5 3×2.5 3×4.0 5×2.5 WIRING (mm CIRCUIT BREAKER/Fuse (A) 20/16 30/20 40/30...

  • Page 39: Field Wiring

    Field Wiring Field Wiring 18K~60K Indoor Units...
  • Page 40 Ceiling & Floor Type Ceiling & Floor Type 1. Features ....................39 2. Dimensions ..................40 3. Service Space ..................41 4. Wiring Diagrams ................42 5. Electric Characteristics ..............43 6. Sound Levels ..................44 7. Air Velocity and Temperature Distributions (Reference Data) ..45 8.

  • Page 41: Features

    Ceiling & Floor Type 1. Features 1.1. New design, more modern and elegant appearance. 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 conditioner in the center of the ceiling is impossible due to a structure such as one lighting.

  • Page 42: Dimensions

    Ceiling & Floor Type 2. Dimensions Wiring connection port Drain discharge port Fresh air intake Refrigerant pipe hole Hanging arm Capacity (KBtu/h) 18/24 1068 36/48/60 1650 1565 Indoor Units...

  • Page 43: Service Space

    Ceiling & Floor Type 3. Service Space Indoor Units...

  • Page 44: Wiring Diagrams

    Ceiling & Floor Type 4. Wiring Diagrams LIUH018021T431E-1，LIUH024021T431E-1 LIUH036021T431E-1，LIUH048021T431E-1，LIUH060021T431E-1 Indoor Units...

  • Page 45: Electric Characteristics

    Ceiling & Floor Type 5. Electric Characteristics Indoor Units Power Supply Model Voltage Min. Max. LIUH018021T431E-1 220-240V 198V 254V LIUH024021T431E-1 220-240V 198V 254V LIUH036021T431E-1 220-240V 198V 254V LIUH048021T431E-1 220-240V 198V 254V LIUH060021T431E-1 220-240V 198V 254V Note: MFA: Max. Fuse Amps. (A)

  • Page 46: Sound Levels

    Ceiling & Floor Type 6. Sound Levels Microphone 1.5m Air outlet side Microphone Ceiling Floor Noise level dB(A) Sound Power Model dB (A) LIUH018021T431E-1 LIUH024021T431E-1 LIUH036021T431E-1 LIUH048021T431E-1 LIUH060021T431E-1 Indoor Units...

  • Page 47: Air Velocity And Temperature Distributions (Reference Data)

    Ceiling & Floor Type 7. Air Velocity and Temperature Distributions (Reference Data) Model: 18k,24k Ceiling installation: Discharge angle 17° Discharge angle 50° Indoor Units...
  • Page 48 Ceiling & Floor Type Floor installation: Discharge angle 17° Discharge angle 50° Indoor Units...
  • Page 49 Ceiling & Floor Type Model: 36k Ceiling installation: Discharge angle 17° Discharge angle 50° Indoor Units...
  • Page 50 Ceiling & Floor Type Floor installation: Discharge angle 17° Discharge angle 50° Indoor Units...
  • Page 51 Ceiling & Floor Type Model: 48k,60k Ceiling installation: Discharge angle 17° Discharge angle 50° Indoor Units...
  • Page 52 Ceiling & Floor Type Floor installation: Discharge angle 17° Discharge angle 50° Indoor Units...

  • Page 53: Accessories

    Ceiling & Floor Type 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.

  • Page 54: Field Wiring

    Field Wiring 10. Field Wiring Indoor Units...
  • Page 55 Four-way Cassette Type (Compact) Four-way Cassette Type (Compact) 1. Features ....................54 2. Dimensions ..................56 3. Service Space ..................57 4. Wiring Diagrams .................. 58 5. Air Velocity and Temperature Distributions (Reference Data) ..59 6. Electric Characteristics ..............60 7.

  • Page 56: Features

    Features 1. Features 1.1 New panel 360°surrounding air outlet design, affords comfortable feeling ➢ 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 installation and will not damage the decoration. The panel size is 647×50×647mm. ➢...
  • Page 57 Features Indoor Units...

  • Page 58: Dimensions

    Dimensions 2. Dimensions LICH4012021T431E-1，LICH4018021T431E 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: Wiring Diagrams

    Wiring Diagrams 4. Wiring Diagrams LICH4012021T431E-1 LICH4018021T431E Indoor Units...

  • Page 61: Air Velocity And Temperature Distributions (Reference Data)

    Air Velocity and Temperature Distributions (Reference Data) 5. Air Velocity and Temperature Distribution s (Reference Data) Airflow velocity Temperature Indoor Units...

  • Page 62: Electric Characteristics

    Electric Characteristics 6. Electric Characteristics Indoor Units Power Supply Model Voltage Min. Max. LICH4012021T431E-1 220-240V 198V 254V LICH4018021T431E 220-240V 198V 254V Note: MFA: Max. Fuse Amps. (A) 7. Sound Levels 1.4m Microphone Noise level dB(A) Noise Power dB(A) Model LICH4012021T431E-1 LICH4018021T431E Indoor Units...

  • Page 63: Accessories

    Accessories 8. Accessories Name Shape Quantity Installation Fittings Installation paper board Tubing & Fittings Soundproof / insulation sheath Out-let pipe sheath Out-let pipe clasp Drainpipe Fittings Drain joint Seal ring Remote controller & Its Frame Remote controller & Its Frame(The product you Remote controller holder have might not be provided the following...

  • Page 64: Field Wiring

    Field Wiring 10. Field Wiring LICH4012021T431E-1 LICH4018021T431E Indoor Units...
  • Page 65 Outdoor Units Part 3 Outdoor Units 1. Dimensions ..............64 2. Service Space ..............66 3. Wiring Diagrams ............67 4. Piping Diagrams ............. 72 5. Electric Characteristics ..........73 6. Operation Limits ............74 7. Sound Levels ..............75 Outdoor Units...

  • Page 66: Dimensions

    Dimensions 1. Dimensions Unit：mm Model(KBtu/h) 12/18 1030 Outdoor Units...
  • Page 67 Dimensions Unit：mm Model(KBtu/h) 48/60 1333 1045 Outdoor Units...

  • Page 68: Service Space

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

  • Page 69: Wiring Diagrams

    Wiring Diagrams 3. Wiring Diagrams LIHP012000T431E Outdoor Units...
  • Page 70 Wiring Diagrams LIHP018000T431E LIHP024000T431E Outdoor Units...
  • Page 71 Wiring Diagrams LIHP036000T431E Outdoor Units...
  • Page 72 Wiring Diagrams LIHP036000M431E Outdoor Units...
  • Page 73 Wiring Diagrams LIHP048000T431E LIHP048000M431E，LIHP060000M431E Outdoor Units...

  • Page 74: Piping Diagrams

    Piping Diagrams 4. Piping Diagrams LIHP012000T431E，LIHP018000T431E ，LIHP024000T431E 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. EXCHANGE temp. sensor sensor (CONDENSER) T2 Evaporator temp. sensor GAS SIDE 4-WAY VALVE Accumulator...

  • Page 75: Electric Characteristics

    Electric Characteristics 5. Electric Characteristics Power Outdoor Unit Supply Model Voltage Min. Max. LIHP012000T431E 220-240V 198V 254V LIHP018000T431E 220-240V 198V 254V LIHP024000T431E 220-240V 198V 254V LIHP036000T431E 220-240V 198V 254V LIHP036000M431E 380-415V 342V 440V LIHP048000T431E 220-240V 198V 254V LIHP048000M431E 380-415V 342V 440V LIHP060000M431E 380-415V...

  • Page 76: Operation Limits

    Operation Limits 6. 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 0℃～50℃ -15℃～24℃ 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 77: Sound Levels

    Sound Levels 7. Sound Levels Outdoor Unit Microphone 1.0m Note: H= 0.5 × height of outdoor unit Model Noise Power dB(A) Noise level dB(A) LIHP012000T431E LIHP018000T431E LIHP024000T431E LIHP036000T431E LIHP036000M431E LIHP048000T431E LIHP048000M431E LIHP060000M431E Outdoor Units...
  • Page 78 Installation Part 4 Installation 1. Installation Procedure ............ 77 2. Location selection ............78 3. Indoor unit installation ........... 79 4. Outdoor unit installation (Side Discharge Unit) ... 92 5. Refrigerant pipe installation .......... 93 6. Drainage pipe installation ..........97 7.

  • Page 79: 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 80: 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 81: 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 >275 24~42 >317 48/55 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 82 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 83 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 84 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 85 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 1200 36~60 1565 ② Wall-mounted installation 3.3.3 Install the pendant bolt ① Ceiling installation Installation...
  • Page 86 Indoor unit installation 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). ② Wall-mounted installation Install the tapping screws onto the wall.(Refer to picture below) 3.3.4 Install the main body ①...
  • Page 87 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 88 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 89 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 90 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 91 Indoor unit installation 3.5 A6 duct indoor unit installation 3.5.1. Service space for indoor unit 3.5.2. Bolt pitch Size of outline dimension mounted lug Capacity(KBtu) 1140 1400 3.5.3. Hang indoor unit 1. Please refer to the upper data to locate the four positioning screw bolt hole on the ceiling. Be sure to mark the areas where ceiling hook holes will be drilled.
  • Page 92 Indoor unit installation 4. After you select an installation location, align the refrigerant pipes, drain pipes, as well as indoor and outdoor wires with their connection points before mounting the unit. 5. Drill 4 holes 10cm (4”) deep at the ceiling hook positions in the internal ceiling. Be sure to hold the drill at a 90°...
  • Page 93 Indoor unit installation Change the fan motor static pressure corresponding to external duct static pressure. NOTE: 1.Do not put the connecting duct weight on the indoor unit. 2.When connecting duct, use inflammable canvas tie-in to prevent vibrating. 3. Insulation foam must be wrapped outside the duct to avoid condensate. An internal duct underlayer can be added to reduce noise, if the end-user requires.

  • Page 94: 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) More than 30cm Air inlet More than 60cm More than 30cm Maintain channel Air inlet More than 60cm Air outlet More than 200cm 4.2 Bolt pitch...

  • Page 95: Refrigerant Pipe Installation

    Refrigerant pipe installation 5. Refrigerant pipe installation 5.1 Maximum pipe length and height drop Considering the allowable pipe length and height drop to decide the installation position. Make sure the distance and height drop between indoor and outdoor unit not exceeded the date in the following table. Model Max.
  • Page 96 Refrigerant pipe installation Flare dimension A (mm) Pipe diameter Flare shape 90 ° 4 1/4" (6.35) 12.0 12.4 3/8" (9.52) R0.4~0.8 15.4 15.8 1/2" (12.7) 18.6 19.1 5/8" (15.9) 22.9 23.3 3/4" (19) ➢ After flared the pipe, the opening part must be seal by end cover or adhesive tape to avoid duct or exogenous impurity come into the pipe.
  • Page 97 Refrigerant pipe installation Note: All used branch pipe must be produced by Midea, otherwise it causes malfunction. The indoor units should be installed equivalently at the both side of the U type branch pipe. Permitted Value Piping 18K+18K Total pipe length (Actual) 24K+24K L+L1+L2 30K+30K...
  • Page 98 Refrigerant pipe installation Installation...

  • Page 99: 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 100 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. 6.2.4 Supporter gap of drainage pipe ➢...
  • Page 101 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. Pump head of big four way cassette: 750mm Pump head of compact four way cassette: 500mm ➢...
  • Page 102 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 103: 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. ➢...

  • Page 104: 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 by the diameter and length of the liquid pipe between indoor and outdoor unit.

  • Page 105: 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 ➢...

  • Page 106: 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 107: 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. ➢...
  • Page 108 Electrical Control System Part 5 Electrical Control System 1. Electrical Control Function ........107 2. Troubleshooting ............119 3. Controller ..............154 Electrical Control System...
  • Page 109 Electrical Control Function 1. Electrical Control Function 1.1 Abbreviation T1: Indoor room temperature T2: Middle indoor heat exchanger coil temperature T2B: Indoor heat exchanger exhaust coil temperature T3: Outdoor heat exchanger pipe temperature T4: Outdoor ambient temperature T5: Compressor discharge temperature 1.2 Main Protection 1.2.1 Compressor three-minute delay at restart Compressor functions are delayed for up to one minute upon the first startup of the unit, and are delayed for...
  • Page 110 Electrical Control Function 0： No malfunction 1：P0 Overcurrent 2：Overpressure 3：Overload 4：Over speed 5：Startup malfunction 6：Lack of phase 7：DC voltage too low 8：Communication fault 9：Parameter fault 10：L3 Current limited 11：L5 Voltage limited 12: Target speed cannot be met during the static pressure calculation process. For other models: If the indoor fan speed is lower than 300 RPM for 50 seconds or more, it shuts off and restarts in 30 seconds.
  • Page 111 Electrical Control Function 1.3 Operation Modes and Functions 1.3.1 Fan Mode (1) Outdoor fan and compressor cease operation. (2) Temperature setting function is disabled, and no preset temperature is displayed. (3) Louver operates the same as in cooling mode. (4) Auto fan: When it fan-only mode, operates the same as auto fan in cooling mode with the temperature set at 24℃.
  • Page 112 Electrical Control Function 16~60K 1.3.2.3 Indoor Fan Running Guidelines In cooling mode, the indoor fan runs continuously and You can select the following speeds: high, medium, low, auto or silent. When the compressor is running, The indoor fan is regulated as illustrated as in the following figure: Setting fan T1-Td ℃(°...
  • Page 113 Electrical Control Function T1-Td (H-L)*0.75+L (H-L)*0.5+L (H-L)*0.25+L 1.3.2.3 Evaporator Low Temperature T2 Protection. ---T2<0℃, the compressor stops and restarts only when T2≥5℃. ---0℃≤T2<4℃, the compressor frequency is limited and decreases to a lower level ---4℃≤T2<7℃, the compressor maintains its current frequency. ---T2>7℃, the compressor frequency is not limited.
  • Page 114 Electrical Control Function 16~60K: 1.3.3.2 Indoor Fan Running Guidelines In heating mode, indoor fan speed can be set at high, medium, low, or auto fan, and the anti-cold-wind function is preferential. When the compressor is running, The indoor fan is regulated as illustrated as in the following figure: Setting fan T1-Td℃...
  • Page 115 Electrical Control Function T1-Td (H+-L)*0.2+L (H+-L)*0.4+L (H+-L)*0.6+L (H+-L)*0.6+L (H+-L)*0.8+L 1.3.3.3 Defrosting Control： Conditions for defrosting: ----the unit enters the defrosting mode according to the value of T3 and T4 as well as the compressor running time. Defrost Stop Conditions: If any one of the following conditions is satisfied, defrosting ends and the unit returns to heating mode. ----T3 rises above than TCDE1℃.
  • Page 116 Electrical Control Function The indoor fan runs at auto fan in each mode. The louver operates the same in each mode. If the machine switches mode between heating and cooling, the compressor stops for 15 minutes and then selects a mode again according to T1-Ts. If the temperature is modified, the machine selects a running function.
  • Page 117 Electrical Control Function The system checks the water level every 5 seconds. ----When the A/C operates in cooling (including auto cooling) or forced cooling mode, the pump begins running immediately and continuously until cooling stops. ----If the water level increases up to the control point, the LED displays an alarm code and the drain pump opens and continually monitors the water level.
  • Page 118 Electrical Control Function If the value is higher than 99, the digital display shows single and double digits. For example, if the digital display shows “2.0", the EXV open angle is 120×4=480p. Frequency limit Bit7 caused by IGBT radiator Frequency limit Bit6 caused by PFC The display value is a...
  • Page 119 Electrical Control Function If the indoor unit is not connected, the digital display shows: “――” If the temperature is lower than 0 ℃, the digital display shows “0”. Average of indoor room temperature If the temperature is higher than 70 ℃, the digital display shows “70”.
  • Page 120 Electrical Control Function Compressor overcurrent protection Compressor EE malfunction Compressor start-up malfunction 311 fan speed has been malfunction Low pressure protection High pressure protection PFC module malfunction Shutdown stop Electrical disconnect DR stop Electrical Control System...
  • Page 121 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 (A6 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...
  • Page 122 Troubleshooting 2.1.5 Icon explanation on indoor display board (Compact cassette). 2.2 Indoor Unit Malfunctions Floor Standing Malfunction Error Code Indoor EEPROM malfunction Communication malfunction between indoor and outdoor units Indoor fan speed malfunction T1 temperature sensor open or short circuit T2 temperature sensor open or short circuit Refrigerant leakage detection Outdoor unit is faulty (for old communication protocol)
  • Page 123 Troubleshooting T3 temperature sensor open or short circuit T5 temperature sensor open or short circuit Outdoor EEPROM malfunction (for some units) Outdoor fan speed malfunction T2B temperature open or short circuit (for free-match indoor units) Communication error between auto-lifting panel and slim cassette Auto-lifting panel is faulty (for slim cassettes with an auto-lifting panel) Auto-lifting panel is not closed (for slim cassettes with an auto-lifting panel)
  • Page 124 Troubleshooting 2.4 Resolving Typical Malfunctions 2.4.1 For Indoor Units 2.4.1.1 Temperature Sensor Open or Short Circuit Malfunction conditions If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure. Possible causes ● Wiring mistakes ●...
  • Page 125 Troubleshooting 2.4.1.3. Indoor EEPROM Malfunction Malfunction conditions Main PCB chip does not receive feedback from EEPROM chip Possible causes ● Installation mistakes ● Faulty PCB Power off, then restart the unit 2 minutes later. Does a problem remain? Replace the indoor main PCB EEPROM: An electrically erasable programmable read-only memory whose contents can be erased and reprogrammed using a pulsed voltage.
  • Page 126 Troubleshooting 2.4.1.5. Indoor Fan Speed Malfunction Malfunction conditions When indoor fan speed continues to run at too low a speed (300RPM) for a certain period of time, the unit will stop and the LED will display a failure code. Possible causes ●...
  • Page 127 Troubleshooting DC motor voltage input and output Color Signal Voltage Vs/Vm 200V~380V Black White 13.5-16.5V Yellow 0~6.5V Blue 13.5-16.5V Electrical Control System...
  • Page 128 Troubleshooting 2.4.1.6. Refrigerant Leakage Detection Malfunction conditions Define the evaporator coil temperature T2 of the compressor starts running as Tcool. If the following occurs 3 times, the display shows "EC" and the unit switches off: In the first 8 minutes after the compressor starts up, if T2 ＜Tcool－2℃ is not maintained for 4 seconds and compressor running frequency is not higher than 50Hz for 3 minutes Potential causes...
  • Page 129 Troubleshooting 2.4.1.7 Outdoor IGBT sensor is faulty Check the connection between temperature Ensure proper connection sensor and PCB. Is it properly wired? Measure the resistance value of the sensor. Is it Replace the sensor within acceptable parameters? Replace outdoor main PCB 2.4.1.8 Communication malfunction between indoor and outdoor units The same as E1 in outdoor.
  • Page 130 Troubleshooting 2.4.2 Super-Slim Cassettes with an Up-Down Panel 2.4.2.1 Communication Errors between Indoor Unit and Up-Down Panel F0 Displayed F0 Displayed Communication failure between Communication failure between indoor unit and up-down panel indoor unit and up-down panel Check the wire connection Check the wire connection between up-down panel and between up-down panel and...
  • Page 131 Troubleshooting 2.4.3 Units with TWINS Function (for the Super-Slim Cassette ) 2.4.3.1 Communication between Master Unit and Indoor Unit Malfunction F3 Displayed F3 Displayed Communication failure between Communication failure between master unit and slave unit master unit and slave unit Check the dial switch settings of Check the dial switch settings of Correct the...
  • Page 132 Troubleshooting 2.4.4 Outdoor Units 2.4.4.1. Compressor Driven Chip EEPROM Malfunction Malfunction conditions Main PCB chip does not receive feedback from EEPROM chip Possible causes ● Installation mistakes ● Faulty PCB Compressor driven chip Compressor driven chip EEPROM malfunction EEPROM malfunction Power off, then restart the Power off, then restart the unit 2 minutes later.
  • Page 133 Troubleshooting 2.4.4.2 Compressor Speed Malfunction/ Zero Speed Protection / Synchronous Fault Protection LED1(Green) off/LED2(Red) flash LED1(Green) off/LED2(Red) flash or LED1(Green) flash/LED2(Red) on or LED1(Green) flash/LED2(Red) on Is there at least one LED in Is there at least one LED in the compressor driven chip the compressor driven chip light?
  • Page 134 Troubleshooting 2.4.4.3 MCE Malfunction MCE malfunction MCE malfunction Power off, then restart the Power off, then restart the unit 2 minutes later. Does a unit 2 minutes later. Does a problem still exist? problem still exist? Replace the outdoor main PCB Replace the outdoor main PCB Electrical Control System...
  • Page 135 Troubleshooting 2.4.4.4. E1 malfunction Current loop communication: Malfunction Indoor unit does not receive feedback from outdoor unit for 110 conditions seconds. This occurs 4 times in a row. Possible causes ● Wiring mistakes ● Faulty indoor or outdoor PCB Power off, then restart the unit 2 minutes later. Power off, then restart the unit 2 minutes later.
  • Page 136 Troubleshooting For 485 Communication Malfunction Indoor unit does not receive feedback from outdoor unit for 60 conditions seconds OR outdoor unit does not receive feedback from indoor unit for 120 seconds. Possible causes ● Wiring mistakes ● Faulty indoor or outdoor PCB E1 displayed E1 displayed Communication malfunction between indoor...
  • Page 137 Troubleshooting 2.4.4.5. F0 Malfunction Malfunction conditions If the outdoor current exceeds the current limit value, the LED displays a failure code. Possible causes ● Wiring mistakes Faulty bridge rectifier ● ● System blockages ● Faulty outdoor PCB Electrical Control System...
  • Page 138 Troubleshooting F0 displayed F0 displayed Current protection of compressor Current protection of compressor Was the protection activated Was the protection activated in standby? in standby? Is the power voltage is Restart the unit when the power Is the power voltage is Restart the unit when the power normal? supply returns to normal...
  • Page 139 Troubleshooting 2.4.4.6. F1, F2, F3 Malfunction Error E4 displayed E4 displayed Judge 1: Outdoor condenser temp. sensor (T3) is malfunctioning Judge 1: Outdoor condenser temp. sensor (T3) is malfunctioning Is the wiring of the condenser temp. Reconnect the condenser Is the wiring of the condenser temp. Reconnect the condenser sensor (T3) not connected properly? temp.
  • Page 140 Troubleshooting 2.4.4.7. F4 Malfunction Malfunction conditions Main PCB chip does not receive feedback from EEPROM chip Possible causes ● Installation mistakes ● Faulty PCB F4- Display F4- Display Outdoor EEPROM malfunction Outdoor EEPROM malfunction Power off, then restart the Power off, then restart the unit 2 minutes later.
  • Page 141 Troubleshooting 2.4.4.9. P0 Malfunction Malfunction conditions When the voltage signal te IPM sends to compressor drive chip is not normal, the LED displays “P0” and the unit turns off. Possible causes Wiring mistakes ● Faulty IPM board ● Faulty outdoor fan assemby ●...
  • Page 142 Troubleshooting P0 displayed P0 displayed IPM module protection IPM module protection Restart the unit when the power supply Restart the unit when the power supply Is the power voltage normal? Is the power voltage normal? returns to normal returns to normal Is the outdoor terminal voltage Are the power wires Reconnect the power...
  • Page 143 Troubleshooting 2.4.4.10. P1 malfunction Malfunction decision An abnormal voltage rise or drop is detected by checking the conditions specified voltage detection circuit. Supposed causes Abnormal power supply ⚫ ⚫ Wiring mistake ⚫ Faulty bridge rectifier ⚫ Faulty IPM board P1 display P1 display Voltage protection Voltage protection...
  • Page 144 Troubleshooting 2.4.4.11. P4 Malfunction The troubleshooting is same as the “ ” IPM module protection 2.4.4.12. J0 Malfunction Malfunction conditions When evaporator coil temperature is more than 60°C, the unit stops. It starts again only when the evaporator coil temperature is less than 54°C Possible causes •...
  • Page 145 Troubleshooting 2.4.4.13. J1 Malfunction Malfunction conditions When the outdoor pipe temperature is more than 65°C, the unit stops. It starts again only when the outdoor pipe temperature is less than 52°C. Possible causes Faulty condenser temperature sensor ● Dirty heat exchanger ●...
  • Page 146 Troubleshooting 2.4.4.14. J2 Malfunction Malfunction conditions When the compressor discharge temperature (T5) is more than 115℃ for 10 seconds, the compressor will stop and not restart until T5 is less than 90℃. Possible causes Refrigerant leakage ● Wiring mistake ● Faulty discharge temperature sensor ●...
  • Page 147 Troubleshooting 2.4.4.15. J3 Malfunction Malfunction decision When the voltage signal that IPM send to compressor drive conditions chip is abnormal, the display LED will show “P6” and AC will turn off. Supposed causes Wiring mistake ● Faulty IPM board ● Faulty outdoor fan ass’y ●...
  • Page 148 Troubleshooting 2.4.4.16. J4 Malfunction J4 displayed J4 displayed Communication error between outdoor main Communication error between outdoor main chip and compressor driven chip chip and compressor driven chip Is there at least one LED in the Is there at least one LED in the compressor driven chip light? compressor driven chip light? Check the signal wire between the...
  • Page 149 Troubleshooting 2.4.4.17. J5 Malfunction Malfunction conditions If the sampling voltage is not 5V, the LED displays a failure code. Possible causes ● Wiring mistakes Faulty overload protector ● ● System blockages ● Faulty outdoor PCB J5 displayed J5 displayed High pressure protection High pressure protection Are the high pressure Connect high pressure...
  • Page 150 Troubleshooting 2.4.4.18. P6/J6 Malfunction Malfunction conditions If the sampling voltage is not 5V, the LED displays a failure code. Possible causes ● Wiring mistake Faulty over load protector ● ● System blockages ● Faulty outdoor PCB J6 displayed J6 displayed Low pressure protection Low pressure protection Reconnect the low pressure...
  • Page 151 Troubleshooting 2.4.4.19. J8 malfunction Malfunction decision An abnormal voltage rise or drop is detected by checking the conditions specified voltage detection circuit. Supposed causes Abnormal power supply ⚫ ⚫ Wiring mistake ⚫ Faulty bridge rectifier ⚫ Faulty IPM board J8 display J8 display AC power input voltage AC power input voltage...
  • Page 152 Troubleshooting 2.4.4.20. P2 malfunction Malfunction decision If the sampling voltage is not 5V, the LED will display the failure. conditions Supposed causes Faulty overload protector ● Wiring mistake ● System leakage or block ● Faulty PCB ● Check if the air flow system Clear up the air inlet and outlet or the heat of indoor and outdoor units exchanger of indoor and outdoor units.
  • Page 153 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 154 Troubleshooting Appendix 2 Unit: ℃---K Discharge temperature 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 10.25...
  • Page 155 Troubleshooting Appendix 3 Normal voltage of P and N 208-240V(1-phase,3-phase) 380-415V(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 156 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 157 Controller Buttons and functions 1. Adjust : Decrease the set temperature Keeping pressing will decrease the temp with 1℃per 0.5s. 2. Adjust : Increase the set temperature Keeping pressing will increase the temp with 1℃ per 0.5s. 3. MODE: Once pressing, running mode will be selected in the following sequence: AUTO COOL HEAT...
  • Page 158 Controller 3.1.2 RG51C/E Remote Controller Specifications Model RG51C/E 3.0V(2pieces of LR03 7＃ batteries) Rated Voltage 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 SE T TEMP ERATURE( C ) FA N AUT O...
  • Page 159 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 160 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 1. Adjust : Decrease the set temperature Keeping pressing will decrease the temp with 1℃per 0.5s. 2.
  • Page 161 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 162 Controller 3.2 Wired Remote Controller 3.2.1 KJR-12B 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 163 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 164 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.

This manual is also suitable for:

Liuh024021t431e-1Liuh036021t431e-1Liuh048021t431e-1Liuh060021t431e-1Lifhc012021t431e-1Lifhc018021t431e-1 ... Show all

Table of Contents