Related Manuals for Kaisai SUPER DC INVERTER SERIES
Summary of Contents for Kaisai SUPER DC INVERTER SERIES
- Page 1 New Energy Requirement SUPER DC INVERTER SERIES Service Manual 2012 LFIS-B-1211 Contents...
- Page 2 General Information...
- Page 3 Contents LFIS-B-1211 Part 1 General Information ....................1 Part 2 Indoor Units ......................... 6 Part 3 Outdoor Units ......................41 Part 4 Installation ........................50 Part 5 Electrical Control System ..................78 ※The specifications, designs, and information in this book are subject to change without notice for product improvement.
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Page 5: Table Of Contents
LFIS-B-1211 General Information Part 1 General Information 1. Model Lists ....................2 2. External Appearance ................3 2.1 Indoor Units ......................3 2.2 Outdoor Units ......................3 3. Nomenclature ................... 4 4. Features ....................5 General Information... -
Page 6: Model Lists
Model Lists LFIS-B-1211 Model Lists 1.1 Indoor Units R410A (capacity multiplied by 1000Btu/h) Type Function ● ● ● Super slim cassette Cooling and heating ● ● ● Duct Cooling and heating ● ● ● Ceiling-floor Cooling and heating 1.2 Outdoor Units Universal Outdoor unit Model Compressor type Compressor Brand... -
Page 7: External Appearance
LFIS-B-1211 External Appearance External Appearance 1.2 Indoor Units Super slim cassette Duct Ceiling-Floor 2.2 Outdoor Units Single fan outdoor unit General Information... -
Page 8: Nomenclature
Nomenclature LFIS-B-1211 Nomenclature 3.1 Indoor Unit M U B T- 36 H R D N1- R Power Supply Q 220~240V,1N, 50Hz R 380~420V, 3N, 50Hz N 220~230V, 1N, 60Hz D 220V~, 3N, 60Hz C 380~420V,3N,60Hz Refrigerant N1 R410A -- R22 D DC Inverter -- On-Off F Full DC... -
Page 9: Features
LFIS-B-1211 Features Features 4.1. To meet Europe A level, actual EER/COP of new product with BLDC motors of indoor & outdoor unit and DC compressor will be higher than 3.4. 4.2. Low ambient kit is standard for outdoor units 4.3. Network control function is standard for the indoor units. 4.4. - Page 10 Indoor Units LFIS-B-1211 Part 2 Indoor Units Super Slim Cassette Type ..........7 Duct Type ................ 20 Ceiling & Floor Type ............33 Indoor Units...
- Page 11 LFIS-B-1211 Super Slim Cassette Type Super Slim Cassette Type 1. Features ................8 2. Dimensions ............... 12 3. Service Space ..............13 4. Wiring Diagrams ............... 14 5. Electric Characteristics ........... 15 6. Sound Levels ..............16 7. Accessories ..............17 8.
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Page 12: Features
Features LFIS-B-1211 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) Old Cassette New slim cassette Volume change... - Page 13 LFIS-B-1211 Features New air-intake 1.3 Optional ionizer generator Ionizer generator is optional to get refreshing air to your room. Ionizer can be switched on or off by remote controller. When pressing the Clean Air button on the remote controller, Ionizer will work and the indicator light on display board will shine.
- Page 14 Features LFIS-B-1211 1.4 External air duct design Reserve external air duct, more flexible for the air supply. 1.5 Built-in draining pump Due to the improvement of structure, more convenient to repair or replace the draining pump. Draining Pump ...
- Page 15 LFIS-B-1211 Features 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 control. Alarm lamp Long-distance on-off controller 1.7 Standard touch screen wired controller ...
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Page 16: Dimensions
Dimensions LFIS-B-1211 2. Dimensions Model >235 >235 >275 Indoor Units... -
Page 17: Service Space
LFIS-B-1211 Service Space 3. Service Space >1000m m >1000mm Indoor Units... -
Page 18: Wiring Diagrams
Wiring Diagrams LFIS-B-1211 4. Wiring Diagrams KCD-18HRFN1-QRC4 KCD-24HRFN1-QRC4 KCD-24HRFN1-QRC8 KCD-36HRFN1-QRC4 Indoor Units... -
Page 19: Electric Characteristics
LFIS-B-1211 Electric Characteristics Electric Characteristics Power Indoor Unit Supply Model Voltage KCD-18HRFN1-QRC4 220-240 KCD-24HRFN1-QRC4 220-240 KCD-24HRFN1-QRC8 220-240 KCD-36HRFN1-QRC4 220-240 Notes: MFA: Max. Fuse Amps. (A) Indoor Units... -
Page 20: Sound Levels
Sound Levels LFIS-B-1211 Sound Levels 1.0m Microphone Noise level dB(A) Model Noise Power dB(A) KCD-18HRFN1-QRC4 KCD-24HRFN1-QRC4 KCD-24HRFN1-QRC8 KCD-36HRFN1-QRC4 Indoor Units... -
Page 21: Accessories
LFIS-B-1211 Accessories Accessories Name Shape Quantity Installation paper board INSTALLATION FITTINGS Bolt M5 Tubing & Fittings Soundproof / insulation sheath Out-let pipe Out-let pipe sheath Drainpipe Fittings Out-let pipe clasp Remote controller & Its Frame Remote controller holder Remote controller & Its Frame Mounting screw(ST2.9×10-C-H) Remote controller manual... -
Page 22: The Specification Of Power
The Specification of Power LFIS-B-1211 8. The Specification of Power Model 18000-24000Btu/h 36000 36000 Btu/h Phase 1-phase 1-phase 1-phase Frequency and Voltage 220-240V, 50Hz 220-240V, 50Hz 220-240V, 50Hz INDOOR UNIT POWER POWER WIRING (mm 3×1.0 3×1.0 3×1.0 CIRCUIT BREAKER (A) Phase 1-phase 1-phase... -
Page 23: Field Wiring
LFIS-B-1211 Field Wiring 9. Field Wiring Indoor Units... -
Page 24: Duct Type
Duct Type LFIS-B-1211 Duct Type 1. Features ................21 2. Dimensions ............... 24 3. Service Space ..............25 4. Wiring Diagrams ............... 26 5. Static Pressure ..............27 6. Electric Characteristics ........... 28 7. Sound Levels ..............29 8. Accessories ..............30 9. -
Page 25: Features
LFIS-B-1211 Duct Type Features 1.1 Installation accessories: (Optional) Front Board, Canvas Air Passage, Filter, Panel, for easy installation 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 26 Duct Type LFIS-B-1211 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 27 LFIS-B-1211 Duct Type 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.
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Page 28: Dimensions
Duct Type LFIS-B-1211 Dimensions Size of outline Outline dimension(mm) Air outlet opening size Air return opening size dimension mounted Capacity plug (KBtu) 18/24 270 635 570 30/36 1140 270 775 710 1035 1180 Indoor Units... -
Page 29: Service Space
LFIS-B-1211 Duct Type 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 30: Wiring Diagrams
Duct Type LFIS-B-1211 Wiring Diagrams KTB-18HWFN1-QRC4 KTB-24HWDN1-QRC4 KTB-36HWFN1-QRC4 Indoor Units... -
Page 31: Static Pressure
LFIS-B-1211 Duct Type Static Pressure 18,000Btu/h 24,000Btu/h Super high speed High speed Mid speed Low speed 1300 1400 900 1000 1100 1200 1500 Air volume(m /h) 36,000Btu/h Super high speed High speed Mid speed Low speed 1100 1200 1400 1600 1800 2000 2200 2400... -
Page 32: Electric Characteristics
Duct Type LFIS-B-1211 Electric Characteristics Indoor Unit Power Supply Model Voltage Min. Max. KTB-18HWFN1-QRC4 220-240 KTB-24HWDN1-QRC4 220-240 KTB-36HWFN1-QRC4 220-240 Note: MFA: Max. Fuse Amps. (A) Indoor Units... -
Page 33: Sound Levels
LFIS-B-1211 Duct Type Sound Levels Concealed Duct Type Discharge Suction Duct Duct 1.4m Microphone Noise level dB(A) Sound Power Model dB(A) KTB-18HWFN1-QRC4 KTB-24HWDN1-QRC4 KTB-36HWFN1-QRC4 Indoor Units... -
Page 34: Accessories
Duct Type LFIS-B-1211 8. Accessories Name Shape Quantity Soundproof / insulation sheath Tubing & Fittings Binding tape Seal sponge Drain joint Drainpipe Fittings (for cooling & heating) Seal ring Wired controller & Its Frame Wired controller ， Owner s manual Others Installation manual Magnetic ring (twist the electric wires L... -
Page 35: The Specification Of Power
LFIS-B-1211 Duct Type The Specification of Power Model 18000-24000Btu/h 36000 36000 Btu/h Phase 1-phase 1-phase 1-phase Frequency and Voltage 220-240V, 50Hz 220-240V, 50Hz 220-240V, 50Hz INDOOR UNIT POWER POWER WIRING (mm 3×1.0 3×1.0 3×1.0 CIRCUIT BREAKER (A) Phase 1-phase 1-phase 3-phase Frequency and Voltage 220-240V, 50Hz... -
Page 36: Field Wiring
Duct Type LFIS-B-1211 Field Wiring Indoor Units... -
Page 37: Ceiling & Floor Type
LFIS-B-1211 Duct Type Ceiling & Floor Type 1. Features ..............34 2. Dimensions ..............35 3. Service Space ............. 36 4. Wiring Diagrams ............37 5. Electric Characteristics ..........38 6. Sound Levels .............. 38 7. Accessories ..............39 8. The Specification of Power ........39 9. -
Page 38: Features
Duct Type LFIS-B-1211 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 conditioner in the center of the ceiling is impossible due to a structure such as one lighting. -
Page 39: Dimensions
LFIS-B-1211 Duct Type 2. Dimensions Capacity (Btu/h) 18K, 24K 1068 1285 1200 Indoor Units... -
Page 40: Service Space
Duct Type LFIS-B-1211 3. Service Space Indoor Units... -
Page 41: Wiring Diagrams
LFIS-B-1211 Duct Type 4. Wiring Diagrams KUE-18HRDN1-QRC4 KUE-24HRDN1-QRC4 KUE-24HRFN1-QRC8 KUE-36HRFN1-QRC4 Indoor Units... -
Page 42: Electric Characteristics
Duct Type LFIS-B-1211 5. Electric Characteristics Indoor Units Power Supply Model Voltage Min. Max. KUE-18HRDN1-QRC4 220-240V 197V 254V 1.25 KUE-24HRDN1-QRC4 220-240V 197V 254V 1.25 KUE-24HRFN1-QRC8 220-240V 197V 254V 1.25 KUE-36HRFN1-QRC4 220-240V 197V 254V 1.25 Remark: MCA: Min. Current Amps. (A) MFA: Max. -
Page 43: Accessories
LFIS-B-1211 Duct Type 7. Accessories 1. Remote controller Remote controller & Its 2. Remote controller holder holder 3. Mounting screw (ST2.9×10-C-H) 4. Alkaline dry batteries (AM4) 5. Owner's manual Others 6. Installation manual 7. Remote controller manual 8. The Specification of Power Model 18000-24000Btu/h 36000... -
Page 44: Field Wiring
Field Wiring LFIS-B-1211 9. Field Wiring Part 3... -
Page 45: Part 3 Outdoor Units
LFIS-B-1211 Part 3 Part 3 Outdoor Units 1. Dimensions ....................42 2. Service Space ..................... 43 3. Piping Diagrams ..................44 4. Wiring Diagrams ..................45 5. Electric Characteristics ................47 6. Operation Limits ..................48 7. Sound Levels ....................49 Part 3... -
Page 46: Dimensions
Dimensions LFIS-B-1211 1. Dimensions Unit：mm Model KOU-18HFN1-QRC4 KOU-24HFN1-QRC4 KOU-24HFN1-QRC8 KOU-36HFN1-QRC4 KOU-36HFN1-RRC4 Part 3... -
Page 47: Service Space
LFIS-B-1211 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 Part 3... -
Page 48: Piping Diagrams
Piping Diagrams LFIS-B-1211 3. Piping Diagrams KOU-18HFN1-QRC8 KOU-24HFN1-QRC4 KOU-24HFN1-QRC8 INDOOR OUTDOOR Electronic CAPILIARY TUBE expansion valve LIQUID SIDE 2-WAY VALVE T3 Condenser temp. sensor HEAT EXCHANGE HEAT (EVAPORATOR) T4 Ambient T1 Room temp. EXCHANGE temp. sensor sensor (CONDENSER) T2 Evaporator temp. -
Page 49: Wiring Diagrams
LFIS-B-1211 Wiring Diagrams 4. Wiring Diagrams KOU-18HFN1-QRC4 KOU-24HFN1-QRC4 KOU-24HFN1-QRC4 KOU-36HFN1-QRC4 Part 3... - Page 50 Wiring Diagrams LFIS-B-1211 KOU-36HFN1-RRC4 Part 3...
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Page 51: Electric Characteristics
LFIS-B-1211 Electric Characteristics 5. Electric Characteristics Outdoor Unit Model Voltage Min. Max. KOU-18HFN1-QRC4 220-240V 198V 254V 220-240V 198V 254V KOU-24HFN1-QRC4 220-240V 198V 254V KOU-24HFN1-QRC8 KOU-36HFN1-QRC4 220-240V 198V 254V KOU-36HFN1-RRC4 380-415V 342V 440V Part 3... -
Page 52: Operation Limits
Operation Limits LFIS-B-1211 6. Operation Limits Temperature Cooling operation Heating operation Mode ≤30℃ ≥17℃ Room temperature Outdoor temperature -15℃～50℃ -15℃～24℃ 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. 2. -
Page 53: Sound Levels
LFIS-B-1211 Sound Levels 7. Sound Levels Outdoor Unit Microphone 1.0m Note: H= 0.5 × height of outdoor unit Model Sound Power dB(A) KOU-18HFN1-QRC4 KOU-24HFN1-QRC4 KOU-24HFN1-QRC8 KOU-36HFN1-QRC4 KOU-36HFN1-RRC4 Part 3... -
Page 54: Part 4 Installation
Installation LFIS-B-1211 Part 4 Installation 1. Installation Procedure ............ 51 2. Location selection ............52 3. Indoor unit installation ........... 53 4. Outdoor unit installation (Side Discharge Unit) .... 63 5. Refrigerant pipe installation ........... 65 6. Drainage pipe installation ..........68 7. -
Page 55: Installation Procedure
LFIS-B-1211 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... -
Page 56: Location Selection
Location selection LFIS-B-1211 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 57: Indoor Unit Installation
LFIS-B-1211 Indoor unit installation 3. Indoor unit installation 3.1 Supper slim cassette indoor unit installation 3.1.1 Service space for indoor unit Model Remark 24-30 >235 R410A and R22 Cooling / Cooling & Heating 36-48 >275 R410A and R22 Cooling / Cooling & Heating 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. - Page 58 Indoor unit installation LFIS-B-1211 Drill four holes of Ø12mm, 45~50mm deep at the selected positions on the ceiling. Then embed the expansible hooks (fittings). 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.
- Page 59 LFIS-B-1211 Indoor unit installation 3.1.5 Install the panel Remove the grille 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. Installation...
- Page 60 Indoor unit installation LFIS-B-1211 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 61 LFIS-B-1211 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) 30/36 1180 48/60 1240 3.2.3 Install the pendant bolt Select the position of installation hooks according to the hook holes positions showed in upper picture. Drill four holes of Ø12mm, 45~50mm deep at the selected positions on the ceiling.
- Page 62 Indoor unit installation LFIS-B-1211 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 63 LFIS-B-1211 Indoor unit installation 3.3.7 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 64 Indoor unit installation LFIS-B-1211 Ceiling & floor indoor unit installation 3.3.1 Service space for indoor unit 3.3.2 Bolt pitch ① Ceiling installation Capacity (Btu/h) 18K, 24K 1200 48K, 60K 1565 ② Wall-mounted installation Installation...
- Page 65 LFIS-B-1211 Indoor unit 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. Drill four holes of Ø12mm, 45~50mm deep at the selected positions on the ceiling. Then embed the expansible hooks (fittings).
- Page 66 Indoor unit installation LFIS-B-1211 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...
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Page 67: Outdoor Unit Installation (Side Discharge Unit)
LFIS-B-1211 Outdoor unit installation (Side Discharge Unit) 4. Outdoor unit installation (Side Discharge Unit) 4.1 Service space for outdoor unit 4.2 Bolt pitch Model 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. - Page 68 Outdoor unit installation (Side Discharge Unit) LFIS-B-1211 Do not lean it more than 45, and do not lay it sidelong. Make concrete foundation according to the specifications of the outdoor units. Fasten the feet of this unit with bolts firmly to prevent it from collapsing in case of earthquake or strong wind. Installation...
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Page 69: Refrigerant Pipe Installation
LFIS-B-1211 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 70 Refrigerant pipe installation LFIS-B-1211 5.2.12 Locate the pipe and fix it by supporter For horizontal refrigerant pipe, the distance between supporters should not be exceed 1m. For vertical refrigerant pipe, the distance between supporters should not be exceed 1.5m. 5.2.13 Connect the pipe to indoor unit and outdoor unit by using two spanners.
- Page 71 LFIS-B-1211 Refrigerant pipe installation 5.3.2 Size of joint pipes for indoor unit (R410a) 5.3.3 Size of joint pipes for outdoor unit (R410a) 5.3.4 The branching pipe must be installed horizontally, error angle of it should not large than 10°. Otherwise, malfunction will be caused.
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Page 72: Drainage Pipe Installation
Drainage pipe installation LFIS-B-1211 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 73 LFIS-B-1211 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 74 Drainage pipe installation LFIS-B-1211 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 75 LFIS-B-1211 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.
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Page 76: Vacuum Drying And Leakage Checking
Vacuum Drying and Leakage Checking LFIS-B-1211 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 77: Additional Refrigerant Charge
LFIS-B-1211 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 78: Engineering Of Insulation
Engineering of insulation LFIS-B-1211 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 79 LFIS-B-1211 Engineering of insulation cause leakage to damage the house decoration. Installation...
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Page 80: Engineering Of Electrical Wiring
Engineering of electrical wiring LFIS-B-1211 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 81: Test Operation
LFIS-B-1211 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 82: Part 5 Electrical Control System
Electrical Control System LFIS-B-1211 Part 5 Electrical Control System 1. Electrical Control Function ........79 2. Troubleshooting ............88 3. Controller ..............117 Electrical Control System... - Page 83 LFIS-B-1211 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 84 Electrical Control Function LFIS-B-1211 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) Indoor fan can be set to high/(med)/low/auto. (4) The louver operates same as in cooling mode. (5) Auto fan: High Medium...
- Page 85 LFIS-B-1211 Electrical Control Function High Medium 1.3.2.4 Evaporator low temperature T2 protection. When T2<2℃ and lasts for 3 minutes, the indoor has no capacity demand and resume till T2≥7℃ . 1.3.2.5 Condenser high temperature T3 protection When T3≥65℃ for 3 seconds, the compressor will shut off. When T3＜52,the compressor will restart. 1.3.3 Heating Mode 1.3.2.1 Outdoor PMW open angle control The unit is working in heating mode with the EXV open 300P for 3 minutes, then adjusting PMW open angle...
- Page 86 Electrical Control Function LFIS-B-1211 T1-Ts- ¦ ¤ Medium High 1.3.3.4 Defrosting mode： For 24-36K models: Condition of defrosting: T3≤TempEnterDefrost_ADD ℃ and lasts for 40 minutes. Defrosting action： 4-Way valve no longer than 10min Compressor TimeA 10S 30S Indoor fan Outdoor fan PMV running 6 mins with 300P 480P...
- Page 87 LFIS-B-1211 Electrical Control Function Time1 3℃ Time2 Time conditions: time1 Time conditions(Meet the following conditions) 1.Running in heating mode 2. T4≥3℃ 3. Compressor is on 4. T3≤TempEnterDefrost_ADD ℃ Cleared conditions (Meet any one of the following conditions) 1. Compressor is off. 2.
- Page 88 Electrical Control Function LFIS-B-1211 4-Way valve no longer than 10min Compressor TimeA 10S 30S Indoor fan Outdoor fan PMV running 8 mins with 300P 480P Condition of ending defrosting: If any one of following items is satisfied, defrosting will stop and the machine will turn to normal heating mode.
- Page 89 LFIS-B-1211 Electrical Control Function 1.3.6 Timer function 1.3.6.1 Timing range is 24 hours. 1.3.6.2 Timer on. The machine will turn on automatically when reaching the setting time. 1.3.6.3 Timer off. The machine will turn off automatically when reaching the setting time. 1.3.6.4 Timer on/off.
- Page 90 Electrical Control Function LFIS-B-1211 1.3.10 Point Check Function There is a check switch in outdoor PCB. Press the switch SW1 to check the states of unit when the unit is running. Press the switch N times it will display the content corresponding to No. N. After getting into the check function, it will display No.
- Page 91 LFIS-B-1211 Electrical Control Function show single digit and tens digit. (For example, the digital display tube show “0.5”,it means the IGBT radiator temp. is 105 degree. the digital display tube show “1.6”,it means the IGBT radiator temp. is 116 degree) Indoor unit number The indoor unit can communicate with outdoor unit well.
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Page 92: Troubleshooting
Troubleshooting LFIS-B-1211 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 (A5 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 93 LFIS-B-1211 Troubleshooting 2.2 Indoor unit malfunction Running Timer Defrosting Alarm Display(digital Malfunction lamp lamp lamp lamp tube) Communication malfunction between indoor ☆ and outdoor units. Open or short circuit of T1 temperature ☆ sensor Open or short circuit of T2 temperature ☆...
- Page 94 Troubleshooting LFIS-B-1211 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? Check the resistance value of the sensor via Appendix 1 Is it normal? Replace indoor or outdoor PCB.
- Page 95 LFIS-B-1211 Troubleshooting 2.4.1.2. Outdoor unit malfunction Outdoor unit malfunction Whether the outdoor main board has error Refer to corresponding solving steps display Whether the outdoor Check whether the power is on unit is power on Check whether the communication wire Connect the wiring well or between the indoor and replace the communication wire...
- Page 96 Troubleshooting LFIS-B-1211 2.4.1.3. Indoor EEPROM malfunction Shut off the power supply and turn it on 5 seconds later. Is it still displaying the error code? If the EEPROM chip is welded on PCB, replace the PCB directly. Otherwise, Insert the EEPROM well check whether the EEPROM chip plugged in PCB well?
- Page 97 LFIS-B-1211 Troubleshooting 2.4.1.5. Indoor fan Speed has been out of control. (Only for the units used DC motor) Shut off the power supply and turn it on 1 minute later. Is it The unit operates normally. still displaying the error code? Shut off the power supply, Replace indoor fan rotate the fan by hand.
- Page 98 Troubleshooting LFIS-B-1211 Control chip is in main PCB Color Orange Grey White Pink Black Signal Color Blue Yellow Signal 1) Release the UVW connector. Measure the resistance of U-V, U-W, V-W. If the resistance is not equal to each other, the fan motor must have problems and need to be replaced.
- Page 99 LFIS-B-1211 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 100 Troubleshooting LFIS-B-1211 2.4.2.3 Up-down panel is not closed Electrical Control System...
- Page 101 LFIS-B-1211 Troubleshooting 2.4.3 For the unit with TWINS function 2.4.3.1 Communication failure between master unit and indoor unit Electrical Control System...
- Page 102 Troubleshooting LFIS-B-1211 2.4.4 For the outdoor unit 2.4.4.2. E0 malfunction E0 display Outdoor EEPROM malfunction If the EEPROM chip is welded on PCB, replace the PCB Insert the EEPROM well directly. Otherwise, check whether the EEPROM chip plugged in PCB well? Replace the outdoor main board Electrical Control System...
- Page 103 LFIS-B-1211 Troubleshooting 2.4.4.3. E2 malfunction (Only for 12k) Power off, then turn on the unit 5 seconds later(reconnect the power wire).Is the error still displaying after several minutes? Check all the wirings between indoor and outdoor, indoor main PCB and outdoor main PCB following the wiring diagram.
- Page 104 Troubleshooting LFIS-B-1211 2.4.4.4. E2 malfunction (For 18-60k) Power off, then turn on the unit 5 seconds later(reconnect the power wire).Is the error still displaying after several minutes? Check if there’s any interference. Remove interference. Such as too many lamps, power Increase the capacity of anti- transformers? Or the signal wire is interference...
- Page 105 LFIS-B-1211 Troubleshooting 2.4.4.5. E3 malfunction E3 display Communication malfunction between IPM board and outdoor main board Is there at least one LED in the IPM board light? Check the signal wire between the IPM module and the main board, is it connected good? Reconnect and retry.
- Page 106 Troubleshooting LFIS-B-1211 2.4.4.6. E4 malfunction 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 Replace condenser temp.
- Page 107 LFIS-B-1211 Troubleshooting 2.4.4.7. E5 malfunction (For single phase units) E5 display Voltage protection Check the voltage of outdoor unit power supply, whether the voltage Check the power supply between L(1) and N is about 220~240VAC Replace the power board, then check whether the system can run normally Check whether the voltage of IPM board P and N is...
- Page 108 Troubleshooting LFIS-B-1211 2.4.4.8. E5 malfunction (For three phases units) E5 display Voltage protection Check the voltage of outdoor unit power supply, whether the voltage between L(1) Check the power supply ,L(2),L(3)and N is about 220VAC and between L(1) ,L(2),L(3) is about 380VAC Replace the power board, then check whether the system can run normally...
- Page 109 LFIS-B-1211 Troubleshooting 2.4.4.9. E6 malfunction (Only for 36K, 48K with 1 phase) E6 display PFC module protection Check whether the connecting line between Connect it tightly, check normal or not main board and the PFC module is connected tightly Check whether the voltage range of P-N on IPM Replace the outdoor main board module is normal?
- Page 110 Troubleshooting LFIS-B-1211 2.4.4.10. P0 malfunction P0 display Temperature protection of compressor top Whether compressor Whether the connection is Reconnect and retest. operates? good? Whether refrigerant circulation volume is normal? Whether protector is normal? If Replace the protector. protector is normal,resistance = 0 Charge refrigerant Replace the outdoor main PCB Whether abnormality is the...
- Page 111 LFIS-B-1211 Troubleshooting 2.4.4.11. P1 malfunction (Only for 30K~60K) P1 display High pressure protection Judge 1: Whether the wiring between the high pressure switch and main control Connect it well board is connected well or correctly Judge 2: Whether the high pressure protector is broken Method: Short connect the high pressure protector...
- Page 112 Troubleshooting LFIS-B-1211 2.4.4.12. P2 malfunction (Only for 30K~60K) P2 display Low pressure protection Judge 1: Whether the wiring between the low pressure protector and main Connect it well control board is connected well or correctly Judge 2: Whether the low pressure protector is broken Method: Short connect the low pressure protector...
- Page 113 LFIS-B-1211 Troubleshooting 2.4.4.13. P3 malfunction P3 display Current protection of compressor Judge 1: Check whether the input current of the power supply wire is more than 20A (For 36K & 48K with 1 phase, it is 30A) Check whether the refrigerant system is ok Judge 2: Check whether the outdoor ambient...
- Page 114 Troubleshooting LFIS-B-1211 2.4.4.14. P4 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.
- Page 115 LFIS-B-1211 Troubleshooting 2.4.4.15. P5 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 High temperature protection of condenser Replace the temperature sensor Check whether the condenser temperature is more than 65°C Check whether the...
- Page 116 Troubleshooting LFIS-B-1211 2.4.4.16. P6 malfunction (For single phase units) 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 voltage...
- Page 117 LFIS-B-1211 Troubleshooting 2.4.4.17. P6 malfunction (For three phases units) 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...
- Page 118 Troubleshooting LFIS-B-1211 2.4.4.18. P7 malfunction P7 display High temperature protection of evaporator Whether the Whether compressor connection is Reconnect and retest operates? good? Check the Check whether the heat resistance value of exchanger is dirty, the air- the sensor via outlet is blocked and the Replace the temperature sensor Appendix 1,Is it...
- Page 119 LFIS-B-1211 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...
- Page 120 Troubleshooting LFIS-B-1211 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 121 LFIS-B-1211 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 122 Controller LFIS-B-1211 Buttons and functions 1. Adjust : Decrease the set temp. Keeping pressing will decrease the temp with 1℃ per 0.5s. 2. Adjust : Increase the set temp. 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 123 LFIS-B-1211 Controller 3.1.2 R51/E Remote Controller Specifications Model R51/E Rated Voltage 3.0V 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 1.
- Page 124 Controller LFIS-B-1211 10. FAN SPEED Button: This button is used for setting fan speed in the sequence that goes from AUTO, LOW, MED to HIGH, and then back to Auto. 11. TEMP UP Button: Push this button to increase the indoor temperature setting or to adjust the timer in a counter-clockwise direction.
- Page 125 LFIS-B-1211 Controller 3.2 Wired Remote Controller 3.2.1 KJR-10B Name and functions of buttons on the wire controller mode selection button: It is used to select mode, push the button one time, then the operation modes will change In turn as follows: AUTO COOL HEAT...
- Page 126 Controller LFIS-B-1211 Name and function of LCD on the wire controller Mode select button (MODE): Press MODE button to select “COOL”, “DRY” , "HEAT", or "FAN ONLY" mode.(HEAT is invalid for COOL ONLY wire controller.) AUTO COOL HEAT Fan speed button (FAN SPEED) Press FAN SPEED to select fan speed from "AUTO", "LOW","...
- Page 127 LFIS-B-1211 Controller Installation Installation Notice: When the air conditioner needs the constant frequency wire Controller, be sure adding a Wire Joint with 5 terminal named A, B, C, D, E in indoor unit, and fixing a infrared emitter whose anode and cathode connecting with A and B near the receiver in the Indoor Unit Switch Board, then connecting the terminal +5v, GND, Run in the Switch Board to C,D,E respectively.
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