Panasonic CU-3KE19NBU Wartungshandbuch

IMPORTANTThese air conditioners employ newrefrigerant R410A.Pay special attention whenservicing the unit.Wall mounted typeCS-MKE7NKUCS-MKE9NKUCS-MKE12

Outdoor Unit CU-3KE19NBUIndoor Unit CS-MKE9NKU ×3Remarks:1. The values shown in performance section and electrical rating section above are based on

41-2. Accessories Supplied with Unit Table 11-3. Optional Copper Tubing KitCopper tubing for connecting the outdoor unit to theindoor unit is availa

52. Installation Site Selection2-1. Indoor UnitAVOID: direct sunlight. nearby heat sources that may affect performance of theunit. areas where le

6 install the indoor unit more than 3.3' (1 m) away from anyantenna or power lines or connecting wires used for tele-vision, radio, telephone, s

7Fig. 4bUnion 1/2"(12.70mm)1/2"(12.70mm)Flare 3/8"(9.52mm)A joint for connecting tubes of different sizes (3/8"(9.52mm) 1/2&qu

8(B)Fig. 4dCBA(CS-MKE7NKU,CS-MKE9NKU,CS-MKE12NKU)(CS-MKE9NB4U,CS-MKE12NB4U)(CS-MKE7NKU,CS-MKE9NKU,CS-MKE12NKU)(CS-MKE9NB4U,CS-MKE12NB4U)DOutdoor unit

9(A)Fig. 4gUnion 3/8"(9.52mm)Flare 1/2"(12.70mm)(1/2"(12.70mm) 3/8"(9.52mm)) Supplied ReducerDC(CS-MKE7NKU,CS-MKE9NKU,CS-MKE12

10(D)Fig. 4jUnion 5/8"(15.88mm)Flare 1/2"(12.70mm)(1/2"(12.70mm) 5/8"(15.88mm))Locally purchasedCD(CS-MKE7NKU,CS-MKE9NKU,CS-MK

2-3. Outdoor UnitAVOID: heat sources, exhaust fans, etc. (Fig. 5a) damp, humid or uneven locations.DO: choose a place as cool as possible. choose

12(1) Recommended dimensions of the baffle platesDFECJHLIBKQRAGO(3- 6.5 mm)3- 1/4"(2- 6 mm) 2- 15/64"ABHCEFKIJGGD(4- 6.5 mm)4

13(3) Installation procedurePanel topPanel frontPanel side RPanel side L1. Air Intake Baffle(1) Left side1. Remove the top panel from the unit.2. Remo

Outdoor Unit CU-4KE24NBUIndoor UnitDuct Less Type RatedCS-MKE7NKU × 2 + CS-MKE9NKURemarks:1. The values shown in performance section and electrical r

14Fig. 6a23-15/165-11/3215/3235-7/16 (900)13-19/3212-19/3214-17/322-29/3229-1/8 (740)23/321-13/162-1/165-29/322-27/322-3/42-1/324-7/162-15/162-3/44-1/

152-6. Diagram of Outdoor Unit InstallationNever install only a single indoor unit.Be sure to connect indoor and outdoor units only incombinations tha

163. Installation Process3-1. Embedding the Tubing and Wiring Do not connect tubes to locations that are embedded. Be sure to bind refrigerant tubi

17When reaming, hold the tube end downward and be sure thatno copper scraps fall into the tube. (Fig. 9)(3) Remove the flare nut from the unit and be

183-6. Insulation of Refrigerant TubingTo prevent heat loss and wet floors due to dripping of con-densation, both tubes must be well insulated with a

194. Air PurgingAir and moisture remaining in the refrigerant system haveundesirable effects as indicated below. Therefore, theymust be purged comple

20Cap tightening torque:170 – 215 lbs·in(200 – 250 kgf·cm)(Tighten by hand, then use a wrench to turn approximately 45°.)StopperSpindleService

21 Pump Down When relocating or disposing of the air conditioner, request thisservice from the dealer where the unit was purchased, or from anapprop

225. Wiring Instructions5-1. General Precautions on Wiring(1) Before wiring, confirm the rated voltage of the unit asshown on its nameplate, then ca

23WARNING Be sure to comply with local codes on running thewire from the indoor unit to the outdoor unit (sizeof wire and wiring method, etc.). Each

Outdoor Unit CU-4KE24NBUIndoor Unit CS-MKE9NKU × 3Remarks:1. The values shown in performance section and electrical rating section above are based on

24When connecting each power wire to the correspondingterminal, follow the instructions “How to connect wiringto the terminal” and fasten the wire sec

25123123123123Indoor unit BIndoor unit AGroundPower:Single-phase,230/208VAC 60HZPower breaker(not provided)Outdoor unit Terminal boardLabel AInter-uni

26Regulations on wire size differ from locality to locality. Forfield wiring requirements, please refer to your local electri-cal codes. Make sure tha

277. Connecting a Home Automation DeviceThe HA (white) 4P terminal is located on the indoor unit PCB. If a HA device will be used, connect it to this

DC1111-0

Outdoor Unit CU-4KE24NBUIndoor Unit CS-MKE9NKU × 3Remarks:1. The values shown in performance section and electrical rating section above are based on

Outdoor Unit CU-4KE31NBUIndoor Unit CS-MKE7NKU × 3 + CS-MKE9NKURemarks:1. The values shown in performance section and electrical rating section above

Outdoor Unit CU-4KE31NBUIndoor Unit CS-MKE9NKU × 4Remarks:1. The values shown in performance section and electrical rating section above are based on

Outdoor Unit CU-4KE31NBUIndoor Unit CS-MKE9NKU × 4Remarks:1. The values shown in performance section and electrical rating section above are based on

Outdoor Unit CU-3KE19NBU2-2-1. Outdoor UnitControl PCBControl Circuit Fuse ControlsPart No.Microprocessor250V 25ACB-CU-3KE19NBUDATA SUBJECT TO CHANGE

Outdoor Unit CU-4KE24NBUControl PCBControl Circuit Fuse ControlsPart No.Microprocessor250V 25ACB-CU-4KE24NBUDATA SUBJECT TO CHANGE WITHOUT NOTICE.Pint

Outdoor Unit CU-4KE31NBUControl PCBControl Circuit Fuse ControlsPart No.Microprocessor250V 25ACB-CU-4KE31NBUDATA SUBJECT TO CHANGE WITHOUT NOTICE.Pint

• Before doing repair work, please read the " SAFETY PRECAUTIONS" carefully and fully understand them. • The precautionary items here

Temperature F ( C)4035302520151050(-20)(-15)(-10) (-5) (0) (5) (10) (15) (20)-4 5 14 23 32 41 50 59 68Resistance (k ohm)032 50 68 86 104 122 140 158

Wide tube service valvedia.3/8" (9.52) ×3Narrow tube service valvedia.1/4" (6.35) ×34-7/165-29/32 2-27/32 2-3/42-1/32 4-1/22-15/162-3/429-

Wide tube service valvedia.1/2" (12.70) ×1Narrow tube service valvedia.1/4" (6.35) ×4Wide tube service valvedia.3/8" (9.52) ×34-7/16

Outdoor Unit CU-4KE31NBUUnit: inch(mm)(852-0-0010-20300-0) Wide tube service valvedia.1/2" (12.70) ×2Narrow tube service valvedia.1/4&qu

Compressor4-wayvalveHigh pressureswitchH.P.MainaccumulatorSubaccumulatorService valve onnarrow tubeService valve onwide tubeCNBNANCWBWAWO.D.1/4"O

4-wayvalveHigh pressureswitchH.P.Defrost valve forhot gas bypassOutdoor Unit CU-4KE24NBUInsulation of Refrigerant TubingBecause capillary tubing is u

CompressorMainaccumulatorSubaccumulatorService valve onnarrow tubeElectric expansion valveService valve onwide tube DNCNBNANDWCWBWAWO.D.1/4"O.D.1

Cooling Characteristics(RH : 46%, Indoor fan speed : High fan)(230V, 60Hz)Heating Characteristics(RH : 85%, Indoor fan speed : High fan)(230V, 60Hz)(1

Cooling Characteristics(RH : 46%, Indoor fan speed : High fan)(230V, 60Hz)Heating Characteristics(RH : 85%, Indoor fan speed : High fan)(230V, 60Hz)(1

Outdoor Unit CU-3KE19NBU Indoor Unit CS-MKE12NKU ×1Cooling Characteristics(RH : 46%, Indoor fan speed : High fan)(230V, 60Hz)Heating Character

WarningIf refrigerant gas blows off during the work, do not touch the refrigerant gas as it may cause frostbite.If refrigerant gas leaks during the wo

Cooling Characteristics(RH : 46%, Indoor fan speed : High fan)(230V, 60Hz)Heating Characteristics(RH : 85%, Indoor fan speed : High fan)(230V, 60Hz)(1

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.•

Outdoor Unit CU-3KE19NBU Indoor Unit CS-MKE12NB4U ×1• This performance chart shows operation of a single wall-mounted indoor unit. The perfor

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.•

Cooling Characteristics(RH : 46%, Indoor fan speed : High fan)(230V, 60Hz)Heating Characteristics(RH : 85%, Indoor fan speed : High fan)(230V, 60Hz)(1

Cooling Characteristics(RH : 46%, Indoor fan speed : High fan)(230V, 60Hz)Heating Characteristics(RH : 85%, Indoor fan speed : High fan)(230V, 60Hz)(1

Outdoor Unit CU-4KE24NBU Indoor Unit CS-MKE12NKU ×1Cooling Characteristics(RH : 46%, Indoor fan speed : High fan)(230V, 60Hz)Heating Character

Cooling Characteristics(RH : 46%, Indoor fan speed : High fan)(230V, 60Hz)Heating Characteristics(RH : 85%, Indoor fan speed : High fan)(230V, 60Hz)(1

Cooling Characteristics(RH : 46%, Indoor fan speed : High fan)(230V, 60Hz)Heating Characteristics(RH : 85%, Indoor fan speed : High fan)(230V, 60Hz)(1

Cooling Characteristics(RH : 46%, Indoor fan speed : High fan)(230V, 60Hz)Heating Characteristics(RH : 85%, Indoor fan speed : High fan)(230V, 60Hz)(1

Table of Contents2467817202124275056626871778081828387...

Outdoor Unit CU-4KE24NBU Indoor Unit CS-MKE12NB4U ×1Cooling Characteristics(RH : 46%, Indoor fan speed : High fan)(230V, 60Hz)Heating Characte

Cooling Characteristics(RH : 46%, Indoor fan speed : High fan)(230V, 60Hz)Heating Characteristics(RH : 85%, Indoor fan speed : High fan)(230V, 60Hz)(1

Cooling Characteristics(RH : 46%, Indoor fan speed : High fan)(230V, 60Hz)Heating Characteristics(RH : 85%, Indoor fan speed : High fan)(230V, 60Hz)(1

Cooling Characteristics(RH : 46%, Indoor fan speed : High fan)(230V, 60Hz)Heating Characteristics(RH : 85%, Indoor fan speed : High fan)(230V, 60Hz)(1

Cooling Characteristics(RH : 46%, Indoor fan speed : High fan)(230V, 60Hz)Heating Characteristics(RH : 85%, Indoor fan speed : High fan)(230V, 60Hz)(1

146(1.0)174(1.2)118(0.8)90(0.6)Cooling Characteristics(RH : 46%, Indoor fan speed : High fan)(230V, 60Hz)Heating Characteristics(RH : 85%, Indoor fan

146(1.0)174(1.2)118(0.8)90(0.6)Cooling Characteristics(RH : 46%, Indoor fan speed : High fan)(230V, 60Hz)Heating Characteristics(RH : 85%, Indoor fan

Cooling Characteristics(RH : 46%, Indoor fan speed : High fan)(230V, 60Hz)Heating Characteristics(RH : 85%, Indoor fan speed : High fan)(230V, 60Hz)(1

Cooling Characteristics(RH : 46%, Indoor fan speed : High fan)(230V, 60Hz)Heating Characteristics(RH : 85%, Indoor fan speed : High fan)(230V, 60Hz)(1

146(1.0)174(1.2)118(0.8)90(0.6)Cooling Characteristics(RH : 46%, Indoor fan speed : High fan)(230V, 60Hz)Heating Characteristics(RH : 85%, Indoor fan

8889909091939494A-1...

Outdoor Unit : CU-3KE19NBUIndoor Unit : CS-MKE9NKU × 3Power Supply : 230V Single Phase 60Hz< Cooling Capacity >5-2. Cooling CapacityTC :

Outdoor Unit : CU-3KE19NBUIndoor Unit : CS-MKE12NB4U × 3Power Supply : 230V Single Phase 60Hz< Cooling Capacity >TC : Total Cooling Capaci

Outdoor Unit : CU-4KE24NBUIndoor Unit : CS-MKE9NKU × 3Power Supply : 230V Single Phase 60Hz< Cooling Capacity >TC : Total Cooling Capacity

Outdoor Unit : CU-4KE24NBUIndoor Unit : CS-KE18NB4UW + CS-MKE12NB4U + CS-MKE12NB4UPower Supply : 230V Single Phase 60Hz< Cooling Capacity >

Outdoor Unit : CU-4KE31NBUIndoor Unit : CS-MKE9NKU × 4Power Supply : 230V Single Phase 60Hz< Cooling Capacity >TC : Total Cooling Capacity

Outdoor Unit : CU-4KE31NBUIndoor Unit : CS-MKE9NB4U × 4Power Supply : 230V Single Phase 60Hz< Cooling Capacity >TC : Total Cooling Capacit

Outdoor Unit : CU-3KE19NBUIndoor Unit : CS-MKE9NKU × 3Power Supply : 230V Single Phase 60Hz< Cooling Capacity (Low Ambient) >5-3. Cooling

Outdoor Unit : CU-3KE19NBUIndoor Unit : CS-MKE12NB4U × 3Power Supply : 230V Single Phase 60Hz< Cooling Capacity (Low Ambient) >TC : Total

Outdoor Unit : CU-4KE24NBUIndoor Unit : CS-MKE9NKU × 3Power Supply : 230V Single Phase 60Hz< Cooling Capacity (Low Ambient) >TC : Total Co

Outdoor Unit : CU-4KE24NBUIndoor Unit : CS-KE18NB4UW + CS-MKE12NB4U + CS-MKE12NB4UPower Supply : 230V Single Phase 60Hz< Cooling Capacity (Lo

APPLICABLE INDOOR UNITSCU-3KE19NBUCU-4KE24NBUCU-4KE31NBUMulti-Outdoor UnitIndoor Unit3-Room4-Room4-RoomCS-MKE7NKUYESYESYESYESYESYESYESYESYESNOYESY

Outdoor Unit : CU-4KE31NBUIndoor Unit : CS-MKE9NKU × 4Power Supply : 230V Single Phase 60Hz< Cooling Capacity (Low Ambient) >TC : Total Co

Outdoor Unit : CU-4KE31NBUIndoor Unit : CS-MKE9NB4U × 4Power Supply : 230V Single Phase 60Hz< Cooling Capacity (Low Ambient) >TC : Total C

Outdoor Unit : CU-3KE19NBUIndoor Unit : CS-MKE9NKU × 3Power Supply : 230V Single Phase 60Hz< Heating Capacity >5-4. Heating CapacityTH :

Outdoor Unit : CU-3KE19NBUIndoor Unit : CS-MKE12NB4U × 3Power Supply : 230V Single Phase 60Hz< Heating Capacity >TH : Total Heating Capaci

Outdoor Unit : CU-4KE24NBUIndoor Unit : CS-MKE9NKU × 3Power Supply : 230V Single Phase 60Hz< Heating Capacity >TH : Total Heating Capacity

Outdoor Unit : CU-4KE24NBUIndoor Unit : CS-KE18NB4UW + CS-MKE12NB4U + CS-MKE12NB4UPower Supply : 230V Single Phase 60Hz< Heating Capacity >

Outdoor Unit : CU-4KE31NBUIndoor Unit : CS-MKE9NKU × 4Power Supply : 230V Single Phase 60Hz< Heating Capacity >TH : Total Heating Capacity

Outdoor Unit : CU-4KE31NBUIndoor Unit : CS-MKE9NB4U × 4Power Supply : 230V Single Phase 60HzTH : Total Heating Capacity (BTU/h)1.Rating conditio

6. ELECTRICAL DATA6-1. Electric Wiring DiagramsOutdoor Unit CU-3KE19NBU8FA2-5251-11700-168

Outdoor Unit CU-4KE24NBU8FA2-5251-11500-169

95 °F DB / 71 °F WB67 °F DB / 57 °F WB80 °F DB / 67 °F WB– DB / – WB1. OPERATING RANGEMaximumMinimumMaximumMinimum115 °F DB14 °F DB75 °F DB / 65 °F W

Outdoor Unit CU-4KE31NBU8FA2-5251-11300-170

7. FUNCTIONS7-1. Explanation of FunctionsThe numerical values such as temperature, frequency, time and current in parentheses are an example of CU-4

Control/conditionsHEATWhen defrost operation begins, frost has formed on the outdoor unit (when the ambient air temperature is low).Defrost operation

Control/conditionsCOOLThe ON/OFF operation button on the remote controller is pressed.The room temperature has reached the desired temperature.The out

Control/conditionsSENSOR DRY(1/f fluctuation fan)The ON/OFF operation button on the remote controller is pressed.The outdoor unit does not operate for

1/f fluctuation fan2502006-minute cycleFig. 2150100(Step)50075

< Low Ambient Cooling Operation >When the mode is switched from cooling opration to low ambient cooling operation,the compressor is stopped for

7-2. Protective Functions7-2-1. Defrost Detection and Release(2) Clean defrostIf all indoor units are stopped during HEAT operation, and frost is de

7-2-2. Current ControlThe operating current may rise as a result of causes including increasing heating or cooling loads or decreases in power voltag

7-2-5. Control at HEAT Start-upIf HEAT operation is started when the outdoor air temperature is 59 °F or below, the unit operates at the HEAT start-u

2. SPECIFICATIONS2-1. Unit SpecificationsOutdoor Unit CU-3KE19NBUIndoor Unit CS-MKE9NKU × 2Remarks:1. The values shown in performance section and e

8. TROUBLESHOOTING (BEFORE CALLING FOR SERVICE)8-1. Precautions before Performing Inspection or RepairBoth the indoor unit and outdoor unit include

8-2. Trouble Diagnosis by Error Monitor Lamps8-2-1. Location of the Error Monitor LampsRemove the top plate of outdoor unit and the cover of Electri

8-3-1. Checking the outdoor unit8-3. Checking the Outdoor System8-3-2. Checking the defrost operationWork procedureApply 220 V AC between terminals

8-4. Trouble Diagnosis of Each Part8-4-1. Problems of Each Part and Inspection PointsFor details about the inspection points, refer to the Inspectio

ProblemsInspectionpointsIndoor unitIndoor unit does not operate.BreakerRefrigerant gas pressure(9)(10)Operation lamp blinking.Operation lamp does not

No voltage on circuit board(7) Electric expansion valveWhen replacing the electric expansion valve and coil, be sure to attach the connectors in the c

(8) Branch tubing temperature sensorCheck that the sensor is securely contained in the thermostat holder.(9) BreakerCheck whether or not the breaker h

8-5. Trouble Diagnosis of Fan MotorThis outdoor DC fan motor contains an internal control PCB. Therefore, it is not possible to measure the coil resi

9. REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN SERVICING UNIT9-1. Characteristics of New Refrigerant R410A9-1-1. What is New Refrigerant R410A?R410

Tubing precautionsRefrigerant R410A is more easily affected by dust or moisture compared with R22, thus be sure to temporarily cover the ends of the t

Outdoor Unit CU-3KE19NBUIndoor Unit CS-MKE9NKU × 3Remarks:1. The values shown in performance section and electrical rating section above are based on

9-3. Tools Specifically for R410A For servicing, use the following tools for R410AGauge manifoldCharging hoseGas leak detectorRefrigerant cylinderCha

9-5. In Case of Compressor Malfunction CAUTIONShould the compressor malfunction, be sure to make the switch to a replacement compressor as quickly as

ValveSingle valveCharge liquid refrigerant with cylinder in up-side-down position.Single valve (with siphon tube)Charge with cylinder in normal positi

Length of tubingEvacuation timeLess than 33 ft. (10 m)More than 10 minutesMore than 33 ft. (10 m)More than 15 minutes9-6. In Case Refrigerant is Lea

9-7. Charging Additional Refrigerant9-7-1. When Tubes are ExtendedObserve the proper amount of refrigerant as stated in this service manual or the i

INSTALLATION INSTRUCTIONSCU-3KE19NBUCU-4KE24NBUCU-4KE31NBU(852-6-4190-584-00-2)APPENDIX AA-1

For Outdoor UnitThis air conditioner uses the refrigerant R410A. External diameter of service port R410A: 5/16" Split System Air Conditioner 8526

IMPORTANT! Please Read Before StartingThis air conditioning system meets strict safety and operatingstandards. As the installer or service person, it

 8VHWKHIODUHPHWKRGIRUFRQQHFWLQJWXELQJ $SSO\UHIULJHUDQWOXEULFDQWWRWKHPDWFKLQJVXUIDFHVRIthe flare and union tubes before connecting them