CU-3KE19NBU Owner's Manual
Page 1
... Pay special attention when servicing the unit. TECHNICAL & SERVICE MANUAL OUTDOOR UNIT : CU-3KE19NBU CU-4KE24NBU CU-4KE31NBU DC INVERTER MULTI-SYSTEM AIR CONDITIONER Capacity at 230V 19,100 BTU/h 23,200 BTU/h 30,600 BTU/h Outdoor Model No. CU-3KE19NBU CU-4KE24NBU CU-4KE31NBU Product Code No. 1 852 361 27 1 852 361 28 1 852 361 29 CU-3KE19NBU CU-4KE24NBU < Applicable Indoor Units > Wall mounted type CS-MKE7NKU CS-MKE9NKU CS-MKE12NKU CS-MKE18NKU CS-MKE24NKU Semi-concealed type CS-MKE9NB4U & CZ...
... Pay special attention when servicing the unit. TECHNICAL & SERVICE MANUAL OUTDOOR UNIT : CU-3KE19NBU CU-4KE24NBU CU-4KE31NBU DC INVERTER MULTI-SYSTEM AIR CONDITIONER Capacity at 230V 19,100 BTU/h 23,200 BTU/h 30,600 BTU/h Outdoor Model No. CU-3KE19NBU CU-4KE24NBU CU-4KE31NBU Product Code No. 1 852 361 27 1 852 361 28 1 852 361 29 CU-3KE19NBU CU-4KE24NBU < Applicable Indoor Units > Wall mounted type CS-MKE7NKU CS-MKE9NKU CS-MKE12NKU CS-MKE18NKU CS-MKE24NKU Semi-concealed type CS-MKE9NB4U & CZ...
CU-3KE19NBU Owner's Manual
Page 2
... power plug. For the step-up capacitor attached to the electric section, perform the repair work according to local applicable regulations related to electrical equipment or interior wiring regulation and make sure to use to the user. Important safety precautions are described for the air conditioner, is not performed correctly, are included in use the exclusive circuit. Performing the work with the power supplied to the unit...
... power plug. For the step-up capacitor attached to the electric section, perform the repair work according to local applicable regulations related to electrical equipment or interior wiring regulation and make sure to use to the user. Important safety precautions are described for the air conditioner, is not performed correctly, are included in use the exclusive circuit. Performing the work with the power supplied to the unit...
CU-3KE19NBU Owner's Manual
Page 3
... an electric shock. If refrigerant gas catches fire, harmful gas may cause an electric shock or fire. Insufficient strength of the installation location and incomplete installation work is 1 Mohm or more ), make sure that the component attachment position, wiring condition, soldering condition and connector connection are replaced, dispose of the old batteries out of the reach of a fall. When the indoor unit is...
... an electric shock. If refrigerant gas catches fire, harmful gas may cause an electric shock or fire. Insufficient strength of the installation location and incomplete installation work is 1 Mohm or more ), make sure that the component attachment position, wiring condition, soldering condition and connector connection are replaced, dispose of the old batteries out of the reach of a fall. When the indoor unit is...
CU-3KE19NBU Owner's Manual
Page 8
Unit Specifications Outdoor Unit CU-3KE19NBU Indoor Unit CS-MKE9NKU × 2 Duct Less Type Rated Type Number of Connectable Indoor Units Number of Operatable Indoor Units Voltage Rating 3-Room Multi Outdoor Unit 3 3 230V Single-Phase 60Hz < 230V > Performance Electrical Rating Total Capacity Sensible Capacity Latent Capacity Air Circulation (High) Available Voltage Range Running Amperes Power Input Power Factor EER COP SEER HSPF Compressor Locked Rotor Amperes Fuse or Circuit Breaker Capacity BTU/h kW BTU/h BTU/h ft3/min (m3/h) V A W % BTU/h/W W/W BTU/Wh BTU/Wh A A Control Fan ...
Unit Specifications Outdoor Unit CU-3KE19NBU Indoor Unit CS-MKE9NKU × 2 Duct Less Type Rated Type Number of Connectable Indoor Units Number of Operatable Indoor Units Voltage Rating 3-Room Multi Outdoor Unit 3 3 230V Single-Phase 60Hz < 230V > Performance Electrical Rating Total Capacity Sensible Capacity Latent Capacity Air Circulation (High) Available Voltage Range Running Amperes Power Input Power Factor EER COP SEER HSPF Compressor Locked Rotor Amperes Fuse or Circuit Breaker Capacity BTU/h kW BTU/h BTU/h ft3/min (m3/h) V A W % BTU/h/W W/W BTU/Wh BTU/Wh A A Control Fan ...
CU-3KE19NBU Owner's Manual
Page 27
... a single wall-mounted indoor unit. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.) • The performance is different, the performance chart will vary depending on the indoor unit type. • Check each performance value in test-run mode. Temperature Charts (CU-3KE19NBU) Outdoor Unit CU-3KE19NBU Indoor Unit CS-MKE7NKU×1 Cooling Characteristics (RH : 46%, Indoor fan speed : High fan...
... a single wall-mounted indoor unit. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.) • The performance is different, the performance chart will vary depending on the indoor unit type. • Check each performance value in test-run mode. Temperature Charts (CU-3KE19NBU) Outdoor Unit CU-3KE19NBU Indoor Unit CS-MKE7NKU×1 Cooling Characteristics (RH : 46%, Indoor fan speed : High fan...
CU-3KE19NBU Owner's Manual
Page 28
... chart will vary depending on the indoor unit type. • Check each performance value in test-run mode. High pressure at wide tube service valve psig (MPaG) Low pressure at wide tube service valve psig (MPaG) Outdoor Unit CU-3KE19NBU Indoor Unit CS-MKE9NKU ×1 Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) Heating Characteristics (RH : 85%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance...
... chart will vary depending on the indoor unit type. • Check each performance value in test-run mode. High pressure at wide tube service valve psig (MPaG) Low pressure at wide tube service valve psig (MPaG) Outdoor Unit CU-3KE19NBU Indoor Unit CS-MKE9NKU ×1 Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) Heating Characteristics (RH : 85%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance...
CU-3KE19NBU Owner's Manual
Page 29
... a single wall-mounted indoor unit. Outdoor Unit CU-3KE19NBU Indoor Unit CS-MKE12NKU ×1 Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance chart Heating Characteristics (RH : 85%, Indoor fan speed : High fan) (230V, 60Hz) (1) High pressure performance chart High pressure at wide tube service valve psig (MPaG) Low pressure at wide tube service valve psig (MPaG) 174 (1.2) Lo fan 160 (1.1) 146 (1.0) Hi fan HH fan Indoor air temp. 86°...
... a single wall-mounted indoor unit. Outdoor Unit CU-3KE19NBU Indoor Unit CS-MKE12NKU ×1 Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance chart Heating Characteristics (RH : 85%, Indoor fan speed : High fan) (230V, 60Hz) (1) High pressure performance chart High pressure at wide tube service valve psig (MPaG) Low pressure at wide tube service valve psig (MPaG) 174 (1.2) Lo fan 160 (1.1) 146 (1.0) Hi fan HH fan Indoor air temp. 86°...
CU-3KE19NBU Owner's Manual
Page 30
... psig (MPaG) Low pressure at wide tube service valve psig (MPaG) Outdoor Unit CU-3KE19NBU Indoor Unit CS-MKE18NKU ×1 Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) Heating Characteristics (RH : 85%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance chart (1) High pressure performance chart 174 (1.2) 160 (1.1) 146 (1.0) Lo fan HH fan Hi fan Indoor air temp. 86°F (30°C) 80°F (27°C) 75...
... psig (MPaG) Low pressure at wide tube service valve psig (MPaG) Outdoor Unit CU-3KE19NBU Indoor Unit CS-MKE18NKU ×1 Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) Heating Characteristics (RH : 85%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance chart (1) High pressure performance chart 174 (1.2) 160 (1.1) 146 (1.0) Lo fan HH fan Hi fan Indoor air temp. 86°F (30°C) 80°F (27°C) 75...
CU-3KE19NBU Owner's Manual
Page 32
Outdoor Unit CU-3KE19NBU Indoor Unit CS-MKE12NB4U ×1 Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) Heating Characteristics (RH : 85%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance chart 174 (1.2) Lo fan Hi fan HH fan (1) High pressure performance chart 578 (4.0) High pressure at wide tube service valve psig (MPaG) Low pressure at wide tube service valve psig (MPaG) 160 (1.1) 146 (1.0) 132 (0.9) Indoor air temp. 86°...
Outdoor Unit CU-3KE19NBU Indoor Unit CS-MKE12NB4U ×1 Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) Heating Characteristics (RH : 85%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance chart 174 (1.2) Lo fan Hi fan HH fan (1) High pressure performance chart 578 (4.0) High pressure at wide tube service valve psig (MPaG) Low pressure at wide tube service valve psig (MPaG) 160 (1.1) 146 (1.0) 132 (0.9) Indoor air temp. 86°...
CU-3KE19NBU Owner's Manual
Page 87
... fan does not stop approximately 10 seconds after operation is outdoor unit controller trouble or motor trouble. OFF), the DC motor trips. (Diagnostic results) All of Fan Motor This outdoor DC fan motor contains an internal control PCB. Therefore, first replace the outdoor unit controller, then (if necessary) replace the DC motor. 87 8-5. Important: (A) Turn OFF the power before connecting or disconnecting the motor connectors. (B) When performing voltage measurement at the DC motor connectors on Installation Instructions of...
... fan does not stop approximately 10 seconds after operation is outdoor unit controller trouble or motor trouble. OFF), the DC motor trips. (Diagnostic results) All of Fan Motor This outdoor DC fan motor contains an internal control PCB. Therefore, first replace the outdoor unit controller, then (if necessary) replace the DC motor. 87 8-5. Important: (A) Turn OFF the power before connecting or disconnecting the motor connectors. (B) When performing voltage measurement at the DC motor connectors on Installation Instructions of...
CU-3KE19NBU Owner's Manual
Page 88
... used for R22. Thus, always charge the refrigerant while it is charged while the refrigerant is a new refrigerant that contains two types of the remaining refrigerant. R410A is in a gaseous phase or liquid phase. Components (mixing proportions) HFC32 (50%) / HFC125 (50%) 9-1-3. Its refrigeration capacity and energy efficiency are required. 88 Thus, when there is a refrigerant leak the basic performance of the air conditioner...
... used for R22. Thus, always charge the refrigerant while it is charged while the refrigerant is a new refrigerant that contains two types of the remaining refrigerant. R410A is in a gaseous phase or liquid phase. Components (mixing proportions) HFC32 (50%) / HFC125 (50%) 9-1-3. Its refrigeration capacity and energy efficiency are required. 88 Thus, when there is a refrigerant leak the basic performance of the air conditioner...
CU-3KE19NBU Owner's Manual
Page 94
... the proper amount of Existing Units Never use new refrigerant R410A for existing units which use its existing tubing. In Case Refrigerant is leaking from the unit. Use of refrigerant as stated in a hazardous condition. 9-8-2. 9-7. Charging Additional Refrigerant 9-7-1. CAUTION Never charge additional refrigerant if refrigerant is Leaking" and completely carry out repairs. This will cause the air conditioner to operate improperly and may result in this service manual or the installation manual that used . 94
... the proper amount of Existing Units Never use new refrigerant R410A for existing units which use its existing tubing. In Case Refrigerant is leaking from the unit. Use of refrigerant as stated in a hazardous condition. 9-8-2. 9-7. Charging Additional Refrigerant 9-7-1. CAUTION Never charge additional refrigerant if refrigerant is Leaking" and completely carry out repairs. This will cause the air conditioner to operate improperly and may result in this service manual or the installation manual that used . 94
CU-3KE19NBU Owner's Manual
Page 97
...Wiring 5-2. For Outdoor Unit INSTALLATION INSTRUCTIONS Split System Air Conditioner This air conditioner uses the refrigerant R410A. Model No. Baffle Plate for Test Run) Pump Down Combination example Indoor unit B Indoor unit A Indoor unit C 5. Diagram of Outdoor Unit 2-6. Caution before Connecting Tubes Tightly 3-5. Tools Required for Installation 2. Optional Copper Tubing Kit 1-4. Indoor Unit 2-2. Insulation of Copper Tube and Insulation Material 1-5. Wiring System Diagram 5-4. Accessories Supplied with a Flare Tool 3-4. Type of Refrigerant Tubing 3-7. Outdoor Unit...
...Wiring 5-2. For Outdoor Unit INSTALLATION INSTRUCTIONS Split System Air Conditioner This air conditioner uses the refrigerant R410A. Model No. Baffle Plate for Test Run) Pump Down Combination example Indoor unit B Indoor unit A Indoor unit C 5. Diagram of Outdoor Unit 2-6. Caution before Connecting Tubes Tightly 3-5. Tools Required for Installation 2. Optional Copper Tubing Kit 1-4. Indoor Unit 2-2. Insulation of Copper Tube and Insulation Material 1-5. Wiring System Diagram 5-4. Accessories Supplied with a Flare Tool 3-4. Type of Refrigerant Tubing 3-7. Outdoor Unit...
CU-3KE19NBU Owner's Manual
Page 98
... manual. When Installing... Get a partner to help for improper installation or maintenance service, including failure to walls and floors. SPECIAL PRECAUTIONS WARNING When Wiring ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. When Connecting Refrigerant Tubing WARNING ‡ :KHQSHUIRUPLQJpiping work do not mix air except for additional instructions. WARNING This symbol refers to the wiring diagram and these instructions when wiring. IMPORTANT! As the installer or service...
... manual. When Installing... Get a partner to help for improper installation or maintenance service, including failure to walls and floors. SPECIAL PRECAUTIONS WARNING When Wiring ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. When Connecting Refrigerant Tubing WARNING ‡ :KHQSHUIRUPLQJpiping work do not mix air except for additional instructions. WARNING This symbol refers to the wiring diagram and these instructions when wiring. IMPORTANT! As the installer or service...
CU-3KE19NBU Owner's Manual
Page 107
When the outdoor unit is recommended to use lug bolts or equal to bolt down unit, reducing vibration and noise. install in a location where at least two sides are unobstructed, so that the flow of air at low outdoor air temperatures. In general the top also must be installed on this side. 11 Fig. 5f Outdoor Unit AVOID: heat sources, exhaust fans, etc. (Fig. 5a) NO Hot air Exhaust fan Heat source...
When the outdoor unit is recommended to use lug bolts or equal to bolt down unit, reducing vibration and noise. install in a location where at least two sides are unobstructed, so that the flow of air at low outdoor air temperatures. In general the top also must be installed on this side. 11 Fig. 5f Outdoor Unit AVOID: heat sources, exhaust fans, etc. (Fig. 5a) NO Hot air Exhaust fan Heat source...
CU-3KE19NBU Owner's Manual
Page 115
... manifold gauge. 19 When recharging or performing other external gas, or by using the gas inside the outdoor unit.) CAUTION In order to break or crack. (1) At this will decrease the heat insulation effect. 3-7. The drain hose may cause the tube to prevent charging errors with armoring tape. Air Purging Air and moisture remaining in the refrigerant system Air Purging with the tubing...
... manifold gauge. 19 When recharging or performing other external gas, or by using the gas inside the outdoor unit.) CAUTION In order to break or crack. (1) At this will decrease the heat insulation effect. 3-7. The drain hose may cause the tube to prevent charging errors with armoring tape. Air Purging Air and moisture remaining in the refrigerant system Air Purging with the tubing...
CU-3KE19NBU/CU-4KE24-31NBU - Installation Manual
Page 2
... For Outdoor Unit INSTALLATION INSTRUCTIONS Split System Air Conditioner This air conditioner uses the refrigerant R410A. Baffle Plate for the Outdoor Unit 2-5. Recommended Wire Length and Diameter 5-3. INSTALLATION CHECK SHEET 27 85264190584002 2011 CV6233187853 Model No. Accessories Supplied with a Flare Tool 3-4. Please Read Before Starting 2 Model Combinations Combine indoor and outdoor units only as listed below. Indoor Unit 2-2. Outdoor Unit 2-4. Flaring Procedure with Unit 1-3. TEST RUN 26 7. Type of Outdoor Unit Installation 3. INSTALLATION PROCESS...
... For Outdoor Unit INSTALLATION INSTRUCTIONS Split System Air Conditioner This air conditioner uses the refrigerant R410A. Baffle Plate for the Outdoor Unit 2-5. Recommended Wire Length and Diameter 5-3. INSTALLATION CHECK SHEET 27 85264190584002 2011 CV6233187853 Model No. Accessories Supplied with a Flare Tool 3-4. Please Read Before Starting 2 Model Combinations Combine indoor and outdoor units only as listed below. Indoor Unit 2-2. Outdoor Unit 2-4. Flaring Procedure with Unit 1-3. TEST RUN 26 7. Type of Outdoor Unit Installation 3. INSTALLATION PROCESS...
CU-3KE19NBU/CU-4KE24-31NBU - Installation Manual
Page 3
... specified type. Carefully refer to all local, state, and national electrical codes. Pay close attention to the wiring diagram and these instructions when wiring. Select an installation location which can cut your back. Provide a suitable air baffle. ...In a Snowy Area Install the outdoor unit on the air conditioner can result in no way be necessary to construct a strong wood or metal frame to provide added support. ...In a Room...
... specified type. Carefully refer to all local, state, and national electrical codes. Pay close attention to the wiring diagram and these instructions when wiring. Select an installation location which can cut your back. Provide a suitable air baffle. ...In a Snowy Area Install the outdoor unit on the air conditioner can result in no way be necessary to construct a strong wood or metal frame to provide added support. ...In a Room...
CU-3KE19NBU/CU-4KE24-31NBU - Installation Manual
Page 12
... is not blocked, and so that the fan of the outdoor unit runs at low speed when the air conditioner is installed in winter), baffle plates must not cover the hole of windbaffle plates at low outdoor air temperatures. Outdoor Unit AVOID: heat sources, exhaust fans, etc. (Fig. 5a) NO Hot air Exhaust fan Heat source damp, humid or uneven locations. DO: Outdoor unit Obstacle above ground level to strong wind, the system...
... is not blocked, and so that the fan of the outdoor unit runs at low speed when the air conditioner is installed in winter), baffle plates must not cover the hole of windbaffle plates at low outdoor air temperatures. Outdoor Unit AVOID: heat sources, exhaust fans, etc. (Fig. 5a) NO Hot air Exhaust fan Heat source damp, humid or uneven locations. DO: Outdoor unit Obstacle above ground level to strong wind, the system...
CU-3KE19NBU/CU-4KE24-31NBU - Installation Manual
Page 28
... wire is located on the indoor unit PCB. The power and voltage are not connected anywhere along their paths. A leak test of the installation location is sufficient to the tubing connections. Thermal insulation has been applied to support the air conditioner weight. The power cable and inter-unit cables are as specified. An air purge of the refrigerant circuit has been conducted. 7. Drain connections are fully open. All service...
... wire is located on the indoor unit PCB. The power and voltage are not connected anywhere along their paths. A leak test of the installation location is sufficient to the tubing connections. Thermal insulation has been applied to support the air conditioner weight. The power cable and inter-unit cables are as specified. An air purge of the refrigerant circuit has been conducted. 7. Drain connections are fully open. All service...
