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15 Protection Control (CU-3E18LBE and CU-4E23LBE)

15.1. Freeze Prevention control (Cool)

• When received freeze prevention signal from indoor unit, the compressor frequency changes according to indoor heat

exchanger temperature.

• When indoor unit request capability OFF due to freeze condition , immediately the capability supply to targeted indoor unit stops.

15.2. Dew Prevention control (Cool)

• When received dew prevention signal from indoor unit, the compressor frequency changes according to indoor intake

temperature and indoor heat exchanger temperature.

15.3. Electronic Parts Temperature Rise Protection 1 (Cool)

• This control prevents electronic parts temperature rise during cooling overload condition.
• Start conditions:

- Outdoor ambient temperature is at protection region as shown in figure below:

- Outdoor unit total current is above 5.5A

• Control content

- Outdoor fan speed is adjusted accordingly.

• Control stop condition

- When outdoor ambient temperature is back to normal region.

• During this control, outdoor fan speed does not reduce for Quiet operation.

15.4. Electronic Parts Temperature Rise Protection 2 (Cool)

• This control prevents electronic parts temperature rise during cooling/dry operation.
• Start conditions:

- Total current is at protection region as shown in figure below:

• Control content

- Outdoor fan speed is adjusted accordingly.

• Control stop conditions

- When total current is back to normal region.

• During this control, outdoor fan speed does not reduce for Quiet operation.

Содержание CU-2E15LBE

Страница 1: ... 4E23LBE 17 4 Refrigeration Cycle Diagram 18 Please file and use this manual together with the service manual for Model No CS E7LKEW CU E7LKE CS E7LKEW CU E7LKE 3 CS E9LKEW CU E9LKE CS E9LKEW CU E9LKE 3 CS E12LKEW CU E12LKE CS E12LKEW CU E12LKE 3 CS E15LKEW CU E15LKE CS E18LKEW CU E18LKE CS E21LKEW CU E21LKE CS XE7LKEW CU E7LKE CS XE7LKEW CU E7LKE 3 CS XE9LKEW CU E9LKE CS XE9LKEW CU E9LKE 3 CS XE1...

Страница 2: ...n Control for Heating Operation 51 15 Protection Control CU 3E18LBE and CU 4E23LBE 52 15 1 Freeze Prevention control Cool 52 15 2 Dew Prevention control Cool 52 15 3 Electronic Parts Temperature Rise Protection 1 Cool 52 15 4 Electronic Parts Temperature Rise Protection 2 Cool 52 15 5 Cooling overload control Cool 53 15 6 Heating overload control Heat 53 15 7 Extreme Low Temperature Compressor low...

Страница 3: ...ng standard regulation and the installation instruction An independent circuit and single outlet must be used If electrical circuit capacity is not enough or defect found in electrical work it will cause electrical shock or fire 9 This equipment is strongly recommended to install with Earth Leakage Circuit Breaker ELCB or Residual Current Device RCD Otherwise it may cause electrical shock and fire...

Страница 4: ...re 3 Tighten the flare nut with torque wrench according to specified method If the flare nut is over tightened after a long period the flare may break and cause refrigerant gas leakage 4 Do not touch outdoor unit air inlet and aluminium fin It may cause injury 5 Select an installation location which is easy for maintenance 6 Pb free solder has a higher melting point than standard solder typically ...

Страница 5: ...rent A 12 0 Starting Current A 5 75 Circuit Breaker Capacity A 15 Dimension Height mm 540 Width mm 780 70 Depth mm 289 Net Weight kg 38 Connection Cable 3 1 Earth ø1 5 mm2 Pipe Length Range 1 room m 3 20 Maximum Pipe Length Total Room m 30 Refrigerant Pipe Diameter Liquid Side mm inch 6 35 1 4 Gas Side mm inch 9 52 3 8 Compressor Type Hermetic Motor Motor Type Brushless 4 poles Rated Output W 1 20...

Страница 6: ...otice for further improvement Item Unit OUTDOOR UNIT Dry Bulb Wet Bulb Indoor Operation Range Cooling Maximum 32 23 Minimum 16 11 Heating Maximum 30 Minimum 16 Outdoor Operation Range Cooling Maximum 43 26 Minimum 16 11 Heating Maximum 24 18 Minimum 10 11 ...

Страница 7: ...nsion Height mm 540 Width mm 780 70 Depth mm 289 Net Weight kg 38 Connection Cable 3 1 Earth ø1 5 mm2 Pipe Length Range 1 room m 3 20 Maximum Pipe Length Total Room m 30 Refrigerant Pipe Diameter Liquid Side mm inch 6 35 1 4 Gas Side mm inch 9 52 3 8 Compressor Type Hermetic Motor Motor Type Brushless 4 poles Rated Output W 1 50k Air Circulation Type Propeller Fan Motor Type DC Motor 8 poles Rated...

Страница 8: ...er Capacity A 16 Dimension Height mm 795 Width mm 875 95 Depth mm 320 Net Weight kg 71 Connection Cable 3 1 Earth ø1 5 mm2 Pipe Length Range 1 room m 3 25 Maximum Pipe Length Total Room m 50 Refrigerant Pipe Diameter Liquid Side mm inch 6 35 1 4 Gas Side mm inch 9 52 3 8 Compressor Type Hermetic Motor Motor Type Brushless 4 poles Rated Output W 1 30k Air Circulation Type Propeller Fan Motor Type D...

Страница 9: ...city A 20 Dimension Height mm 795 Width mm 875 95 Depth mm 320 Net Weight kg 72 Connection Cable 3 1 Earth ø1 5 mm2 Pipe Length Range 1 room m 3 25 Maximum Pipe Length Total Room m 60 Refrigerant Pipe Diameter Liquid Side mm inch 6 35 1 4 Gas Side mm inch 9 52 3 8 Compressor Type Hermetic Motor Motor Type Brushless 4 poles Rated Output W 1 30k Air Circulation Type Propeller Fan Motor Type DC Motor...

Страница 10: ...es air conditioning of up to two separate rooms for CU 2E15LBE CU 2E18LBE A single outdoor unit enables air conditioning of up to three separate rooms for CU 3E18LBE A single outdoor unit enables air conditioning of up to four separate rooms for CU 4E23LBE CU 4E27CBPG ...

Страница 11: ...11 Outdoor Unit CU 2E15LBE Outdoor Unit CU 2E18LBE ...

Страница 12: ...12 Outdoor Unit CU 3E18LBE ...

Страница 13: ...13 Outdoor Unit CU 4E23LBE ...

Страница 14: ...14 ...

Страница 15: ...15 Outdoor Unit CU 4E27CBPG ...

Страница 16: ...16 ...

Страница 17: ...17 3 Dimensions 3 1 CU 2E15LBE CU 2E18LBE 3 2 CU 3E18LBE CU 4E23LBE ...

Страница 18: ...18 4 Refrigeration Cycle Diagram 4 1 CU 2E15LBE CU 2E18LBE ...

Страница 19: ...19 4 2 CU 3E18LBE ...

Страница 20: ...20 4 3 CU 4E23LBE ...

Страница 21: ...21 5 Block Diagram 5 1 CU 2E15LBE CU 2E18LBE ...

Страница 22: ...22 5 2 CU 3E18LBE ...

Страница 23: ...23 5 3 CU 4E23LBE ...

Страница 24: ...24 6 Wiring Connection Diagram 6 1 CU 2E15LBE CU 2E18LBE ...

Страница 25: ...25 6 2 CU 3E18LBE ...

Страница 26: ...26 6 3 CU 4E23LBE ...

Страница 27: ...27 7 Electronic Circuit Diagram 7 1 CU 2E15LBE CU 2E18LBE ...

Страница 28: ...28 7 2 CU 3E18LBE ...

Страница 29: ...29 7 3 CU 4E23LBE ...

Страница 30: ...30 8 Printed Circuit Board 8 1 Main Printed Circuit Board 8 1 1 CU 2E15LBE CU 2E18LBE ...

Страница 31: ...31 8 1 2 CU 3E18LBE CU 4E23LBE ...

Страница 32: ...32 8 2 Noise Filter Printed Circuit Board 8 3 Display Printed Circuit Board ...

Страница 33: ...of the Outdoor Unit Have Been Changed Accompanying the changes in the shapes of the 3 way valve caps the tightening method has also been changed Firmly tighten the 3 way valve caps by hand and then tighten them up by another 30 degrees or so one twelfth of a full turn using a spanner or adjustable spanner ...

Страница 34: ...r Unit Have Been Changed Accompanying the changes in the shapes of the 3 way valve caps the tightening method has also been changed Firmly tighten the 3 way valve caps by hand and then tighten them up by another 30 degrees or so one twelfth of a full turn using a spanner or adjustable spanner ...

Страница 35: ...35 9 3 CU 3E18LBE 9 3 1 Check Points ...

Страница 36: ...36 9 4 CU 4E23LBE 9 4 1 Check Points ...

Страница 37: ...If the unit is used in an area where temperature falls below 0 C for 2 or 3 days in succession it is recommended not to use a drain elbow for the drain water freezes and the fan will not rotate 10 1 3 Install The Outdoor Unit After selecting the best location start installation to Indoor Outdoor Unit Installation Diagram 1 Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut...

Страница 38: ...nserting the flare nut locate at valve onto the copper pipe Align center of piping to valves and then tighten with torque wrench to the specified torque as stated in the table CUTTING AND FLARING THE PIPING 1 Please cut using pipe cutter and then remove the burrs 2 Remove the burrs by using reamer If burrs is not removed gas leakage may be caused Turn the piping end down to avoid the metal powder ...

Страница 39: ...e Be sure to check for gas leakage 10 1 6 Connect The Cable To The Outdoor Unit 1 Remove the control board cover metal from the unit by loosening two screws 2 Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 4 x 1 5 mm2 flexible cord type designation 245 IEC 57 H05RN F or heavier cord 3 Secure the cable onto the control board with the holder clamper ...

Страница 40: ...ivalent length listed above additional charge with 20g of refrigerant R410A for each additional meter of piping Refrigerant piping size Outdoor Unit CU 3E18 CU 4E23 Liquid side ø 6 35 t0 8 ø 6 35 t0 8 Gas side ø 9 52 t0 8 ø 9 52 t0 8 ø 12 7 t0 8 Outdoor Unit CU 3E18 CU 4E23 Equivalent length 30m 30m Allowable piping length Outdoor Unit CU 3E18 CU 4E23 Allowable piping length of each indoor unit mi...

Страница 41: ...ase fasten the installation stand firmly with bolt or nails 10 2 3 Connect The Piping Remove the control board cover resin from the unit by loosening three screws Connecting The Piping To Outdoor Unit Decide piping length and then cut by using pipe cutter Remove burrs from cut edge Make flare after inserting the flare nut locate at valve onto the copper pipe Align center of piping to valves and th...

Страница 42: ...nutes 4 Close the Low side valve of the charging set and turn off the vacuum pump Make sure that the needle in the gauge does not move after approximately five minutes Note BE SURE TO TAKE THIS PROCEDURE IN ORDER TO AVOID REFRIGERANT GAS LEAKAGE 5 Disconnect the charging hose from the vacuum pump and from the service port of the 3 way valve 6 Tighten the service port caps of gas side 3 way valve a...

Страница 43: ...all be approved polychloroprene sheathed 4 x 1 5 mm2 flexible cord type designation 245 IEC 57 or heavier cord 4 Connect the power supply cord and connecting cable between indoor unit and outdoor unit according to the diagram as shown 5 For wire stripping and connection requirement refer to the diagram below 6 Secure the power supply cord and connecting cables onto the control board with the holde...

Страница 44: ...t properties as the heat insulation for the pipes Be sure to insulate both the gas side and liquid side pipes If the pipes are not adequately insulated condensation or water leakages may occur Liquid side pipes Material shall withstand 120 C or higher Gas side pipes ...

Страница 45: ...to control the room temperature When the thermostat is set to OFF during 1 room operation the compressor and fan of the outdoor unit are stopped The outdoor unit fan is stopped 30 seconds after the compressor stops It takes about 180 seconds to restart operation when the compressor has been stopped Time delay safety control 11 2 Deice Operation During Heating operation the deice operation judgment...

Страница 46: ...e is low Control start conditions Cooling operation is activated with compressor ON Outdoor ambient temperature is less than 15 C Control contents When the above conditions are fulfilled based on outdoor pipe temperature the outdoor fan motor will operate according to figure below To improve the judgment accuracy during annual cooling control outdoor ambient temperature sampling for 2 minutes will...

Страница 47: ... units Operation start condition Powerful operation ON for targeted indoor unit Operation content If other indoor units where Powerful operation are OFF achieve setting temperature continuously for 1 minutes after received powerful command from indoor unit then capability supply to other indoor units are stopped for minimum 3 minutes Capability supply stop period follows powerful operation period ...

Страница 48: ...stopped hence no discharged air During heating operation cooling operation is impossible at another indoor unit in another room The priority is given to heating operation if the heating mode is selected first In another room where cooling mode is selected afterward the POWER LED blinks to indicate the cooling operation is in standby condition where the fan is stopped hence no discharged air Operat...

Страница 49: ... has been activated It restarts after 3 minutes Activation temperature 110 C Reset temperature 95 C DC peak current control When the inverter load current DC peak current exceeds the setting value 22 5A the compressor is stopped immediately If this happens within 30 seconds after it started operating it will restart one minute later if it happens after 30 seconds have elapsed since it started oper...

Страница 50: ...eds 45 C the compressor stops After 3 minutes Time delay safety control starts If this situation occurs 4 times within 30 minutes TIMER LED blinks F11 error During Heating operation 4 minutes after compressor started if the temperature of the indoor unit heat exchanger drops below 5 C the compressor stops After 3 minutes Time delay safety control starts If this situation occurs 4 times within 30 m...

Страница 51: ...g indoor unit drops by more than 5 C to 5 C or below 3 minutes after compressor started The non operating indoor unit pipe temperature where outdoor air temperature above 5 C has dropped by more than 20 C to 5 C or lower When above conditions are satisfied the Timer LED blinks H41 error 14 8 Protection Control for Heating Operation 14 8 1 Overload Protection Control The compressor operating freque...

Страница 52: ...ronic parts temperature rise during cooling overload condition Start conditions Outdoor ambient temperature is at protection region as shown in figure below Outdoor unit total current is above 5 5A Control content Outdoor fan speed is adjusted accordingly Control stop condition When outdoor ambient temperature is back to normal region During this control outdoor fan speed does not reduce for Quiet...

Страница 53: ...on This control detect outdoor ambient temperature and perform the fan speed adjustment during heating operation 15 7 Extreme Low Temperature Compressor low pressure protection control Heat This control is to prevent low pressure drops too low during extremely low outdoor ambient temperature to improve the compressor reliability During heating operation when outdoor ambient temperature is in Zone ...

Страница 54: ...o 95 C compressor operation will stop immediately Compressor operation restarts when temperature decreases to 90 C If IPM temperature detected less than 30 C IPM is judged as open circuit F96 is indicated DC peak current control When IPM DC current exceeds set value of 30 0 3 0 A the compressor will stop If the DC peak current detected within 30 seconds after operation starts compressor will resta...

Страница 55: ... after compressor ON at first cooling operation The first cooling operation is defined as cooling operation is ON for less than 8 minutes after new installation or after pump down Control content During this control compressor stop indoor units Timer LED will blink F91 is indicated at indoor units Error reset can be done by power supply reset or reset by using remote control 15 16 Compressor disch...

Страница 56: ...ter 15 minutes if PUMP DOWN switch SW1 is not pressed again Pump down operation is not started within 3 minutes after compressor is stopped Blinking 16 1 2 Test Run operation Test operation can be carried out using TEST OPERATION button SW2 on the Service PCB inside the outdoor unit For Cooling test press the TEST OPERATION button SW2 for 5 seconds or more but less than 10 seconds LED1 and LED 2 w...

Страница 57: ...ration is complete LED indication will illuminated until normal operation starts 4 Follow the product diagnosis procedure 5 When LED 1 only illuminate indicates that outdoor unit is operating normally 16 1 4 Power Save Mode Power Save Mode can be enabled by pushing POWER SAVE switch SW4 to ON before power supply ON When Power Save Mode is ON the unit can be operate at lower running current where t...

Страница 58: ...ective or disconnected H32 Outdoor heat exchanger temperature sensor 2 discharge pipe temp Continue for 5 sec Outdoor heat exchanger temperature sensor defective or disconnected H34 Outdoor heatsink temperature sensor at Control Board Continue for 2 sec Outdoor heatsink temperature sensor at control board defective or disconnected H36 Outdoor gas pipe temperature sensor Continue for 2 sec Outdoor ...

Страница 59: ...s refrigerant Improper heat radiation Outdoor PCB F97 Outdoor compressor overheating protection 4 times occurrences within 10 minutes Insufficient refrigerant Compressor F98 Total running current protection 3 times occurrences within 20 minutes Excess refrigerant Improper heat radiation F99 Outdoor direct current DC peak detection 7 times occurrences Outdoor PCB Compressor Abnormality judgement Em...

Страница 60: ...s for 5s Compressor temperature sensor open or short circuit Compressor temperature sensor lead wire and connector H16 Outdoor current transformer CT abnormality Current transformer faulty or compressor faulty Outdoor PCB faulty or compressor faulty H27 Outdoor air temperature sensor abnormality Continuous for 5s Outdoor air temperature sensor open or short circuit Outdoor air temperature sensor l...

Страница 61: ...oor outdoor connection wire and pipe Indoor heat exchanger sensor lead wire and connector Expansion valve lead wire and connector F90 Power factor correction PFC circuit protection 4 times happen within 10 minutes Power factor correction circuit abnormal Outdoor PCB faulty F91 Refrigeration cycle abnormality 2 times happen within 20 minutes Refrigeration cycle abnormal Insufficient refrigerant or ...

Страница 62: ...running current protection 3 times happen within 20 minutes Total current protection Check refrigeration system Power source or compressor lock F99 Outdoor direct current DC peak detection Continuous happen for 7 times Power transistor module current protection Power transistor module faulty or compressor lock LED 6 LED 5 LED 4 LED 3 LED 2 LED 1 Abnormality judgement Protection operation Problem C...

Страница 63: ...nal cover top and disconnect all the lead wires 3 fasten tab inside 18 1 3 Removing the Control Board 6 Remove the control board cover 7 Remove the 6 screws at the positions on the control board indicated by arrows 8 Disconnect the connectors and pipe sensor connected to the compressor and reactor 9 Remove the control board When pulling the control board upward it may not be possible to remove it ...

Страница 64: ... mounting then remove the fan motor 18 2 Outdoor Unit Removal Procedure CU 3E18LBE CU 4E23LBE Caution When handling electronic controller be careful of electrostatic discharge 18 2 1 Removing the Cabinet Top Plate and Cabinet Front Plate 1 Remove the cabinet top plate remove the 8 screws 2 Remove the 8 screws 1 on the center 3 at the top and 4 at the bottom securing the cabinet front plate release...

Страница 65: ...crew 5 Remove the particular plate remove 2 screw 18 2 3 Removing the Control P C Board 6 Remove the drip proof cover 7 Disconnect the connectors lead wires of the compressor sensor and others 8 Remove the screw at the right side of the control box and pull out the entire control box 9 Release the control P C Board tab to remove the control P C Board ...

Страница 66: ...16 2 1 for removing the cabinet top plate and cabinet front plate 2 Remove the propeller fan by removing the nut turning clockwise at its center 3 Disconnect the fan motor connector from the control P C Board 4 Loosen the 4 fan motor mounting screws then remove the fan motor ...

Страница 67: ...67 19 Technical Data 19 1 Operation Characteristics CU 2E15LBE 19 1 1 One Indoor Unit Operation ...

Страница 68: ...68 ...

Страница 69: ...69 19 1 2 Two Indoor Unit Operation ...

Страница 70: ...70 ...

Страница 71: ...71 19 2 Operation Characteristics CU 2E18LBE 19 2 1 One Indoor Unit Operation ...

Страница 72: ...72 ...

Страница 73: ...73 19 2 2 Two Indoor Unit Operation ...

Страница 74: ...74 ...

Страница 75: ...75 19 3 Operation Characteristics CU 3E18LBE 19 3 1 One Indoor Unit Operation ...

Страница 76: ...76 ...

Страница 77: ...77 ...

Страница 78: ...78 ...

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Страница 80: ...80 ...

Страница 81: ...81 19 3 2 Two Indoor Unit Operation ...

Страница 82: ...82 ...

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Страница 84: ...84 ...

Страница 85: ...85 19 3 3 Three Indoor Unit Operation ...

Страница 86: ...86 ...

Страница 87: ...87 19 4 Operation Characteristics CU 4E23LBE 19 4 1 One Indoor Unit Operation ...

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Страница 89: ...89 ...

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Страница 93: ...93 19 4 2 Two Indoor Unit Operation ...

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Страница 95: ...95 19 4 3 Three Indoor Unit Operation ...

Страница 96: ...96 ...

Страница 97: ...97 19 4 4 Four Indoor Unit Operation ...

Страница 98: ...98 ...

Страница 99: ...loded View and Replacement Parts List 20 1 CU 2E15LBE CU 2E18LBE Note The above exploded view is for the purpose of parts disassembly and replacement The non numbered parts are not kept as standard service parts ...

Страница 100: ...27J 21 STRAINER 1 CWB111004 22 DRYER 1 CWB101016J 25 V COIL COMPLETE 2 CWA43C2086J O 26 V COIL COMPLETE 1 CWA43C2212 O 27 SOUND PROOF BOARD 1 CWH151032 28 HOLDER SENSOR 1 CWMH320001 29 SENSOR COMPLETE 1 CWA50C2088 O 30 HOLDER SENSOR 3 CWH32138 31 SENSOR COMPLETE 1 CWA50C2089 O 32 SENSOR COMPLETE 1 CWA50C2090 O 33 HOLDER SENSOR 2 CWH32074 34 SENSOR COMPLETE 1 CWA50C2097 O 35 NORMAL MODE LINE CHOKE ...

Страница 101: ...101 20 2 CU 3E18LBE CU 4E23LBE Note The above exploded view is for the purpose of parts disassembly and replacement The non numbered parts are not kept as standard service parts ...

Страница 102: ...1 28 SOUND PROOF MATERIAL 1 CWG302246 29 SOUND PROOR MATERIAL 1 CWG302520 30 SOUND PROOR MATERIAL 1 CWG302521 31 SOUND PROOR MATERIAL 1 CWG302522 32 SENSOR COMPLETE 1 CWA50C2515 O 33 V COIL COMPLETE 4 WAY VALVE 1 CWA43C2169J O 34 V COIL COMPLETE EXPAND VALVE WHITE 1 CWA43C2334 O 35 V COIL COMPLETE EXPAND VALVE YELLOW 1 CWA43C2335 O 36 V COIL COMPLETE EXPAND VALVE BLUE 1 CWA43C2336 O 38 SENSOR COMP...

Страница 103: ...WF614369 64 INSTALLATION INSTRUCTION 1 CWF614370 65 INSTALLATION INSTRUCTION 1 CWF614371 66 INSTALLATION INSTRUCTION 1 CWF614372 67 INSTALLATION INSTRUCTION 1 CWF614373 68 INSTALLATION INSTRUCTION 1 CWF614374 69 INSTALLATION INSTRUCTION 1 CWF614375 70 INSTALLATION INSTRUCTION 1 CWF614376 71 INSTALLATION INSTRUCTION 1 CWF614377 72 INSTALLATION INSTRUCTION 1 CWF614378 73 INSTALLATION INSTRUCTION 1 C...

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