Panasonic CS-KE12NB41, CU-KE12NK1, CU-KE18NKU, CS-KE18NB4UW, CZ-18BT1U Outdoor Fan Motor

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9-4-2. Outdoor Fan Motor

This outdoor DC fan motor contains an internal control PCB. Therefore, it is not possible to measure the coil resistance, and the following procedure should be used to check the motor.

Perform the trouble diagnosis by Test Run mode described on Installation Instructions.

Important: (A) Turn OFF the power before connecting or disconnecting the motor connectors.

(B)When performing voltage measurement at the outdoor controller connector for (3) in the table below, the DC motor will trip and voltage output will stop approximately 10 seconds after operation is started. For this reason, to measure the voltage again, first turn OFF the outdoor unit power, then, measure the voltage in Test Run mode.

[Trouble symptom 1] The fan does not stop when the outdoor unit stops. Outdoor unit controller trouble

[Trouble symptom 2] The fan motor does not rotate when the outdoor unit is operating.

(Diagnostic procedure)

*Disconnect the motor connectors and measure the voltage at the DC motor connectors on the outdoor unit controller (3 locations).

Measurement location

Normal value

 

 

(1) Vs-Gnd: Between pin 1 and pin 4

DC 110V or more

 

 

(2) Vcc-Gnd: Between pin 5 and pin 4

DC 14V or more

 

 

(3) Vsp-Gnd: Between pin 7 and pin 4

After fluctuating 4 times between DC 1.0 to 4.3V

 

(1 sec. ON) and DC 0 V (1 sec. OFF), the DC

 

motor trips.

 

 

(Diagnostic results)

All of the above measured values are normal. Fan motor trouble (Replace the motor.) Any one of the above measured values is not normal. Outdoor unit controller trouble

(Replace the controller .)

(Reference) DC motor connector pin arrangement Pin 1: Vs (white)

Pin 2: Not used

Pin 3: Not used

Pin 4: Gnd (black)

Pin 5: Vcc (red)

Pin 6: FG (blue)

Pin 7: Vsp (yellow)

[Trouble symptom 3] Motor rotates for some time (several seconds), but then quickly stops, when the outdoor unit operates.

(There is trouble in the system that provides feedback of motor rotation speed from the motor to the outdoor unit controller.)

[Trouble symptom 4] Fan motor rotation speed does not change during outdoor unit operation.

[Trouble symptom 5] Fan motor rotation speed varies excessively during outdoor unit operation.

(Remedy for symptom 3 to 5)

It is not possible to identify whether the trouble is outdoor unit controller trouble or motor trouble. Therefore, first replace the outdoor unit controller, then (if necessary) replace the DC motor.

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Contents Outdoor Model No. Product Code No 852 361Safety Precautions Prohibit Table of Contents 11-7 11-211-4 11-8Temperature Indoor Air Intake Temp Outdoor Air Intake Temp Operating RangeIndoor Unit SpecificationsUnit Specifications CS-KE12NB41 & CZ-18BT1UDimensions & Weight Indoor Unit Dimensions & Weight Outdoor UnitCU-KE18NKU 230VCU-KE18NKU 208V CZ-KE18NB4UW & CZ-18BT1U Indoor Unit Body CS-KE12NB41 Major Component SpecificationsIndoor Unit Indoor Unit Panel CZ-18BT1UIndoor Unit Body CS-KE18NB4UW CB-CS-KE18NB4UCompressor Outdoor UnitOutdoor Unit CU-KE12NK1 External FinishOutdoor Unit CU-KE18NKU Indoor air temp sensor ModelKTEC-35-S98 Other Component SpecificationsIndoor Unit CS-KE12NB41 & CZ-18BT1U Outdoor air temp sensorDimensional Data Unit inch mmUnit inch mm 852-0-0010-12700-0 Unit inch mm 852-0-0010-13200-0 Refrigerant Flow Diagram Refrigerant Flow DiagramOutdoor unit Outdoor unit Performance Data Temperature ChartsIndoor Unit CS-KE12NB41 & CZ-18BT1U Outdoor Unit CU-KE12NK1 High pressure performance chart Indoor Unit CS-KE18NB4UW & CZ-18BT1U Outdoor Unit CU-KE18NKU At wide Pressure Cooling Capacity Power Supply 115V Single Phase 60Hz Cooling CapacityCU-KE12NK1 Power Supply 230V Single Phase 60Hz Cooling Capacity CS-KE18NB4UW & CZ-18BT1UCooling Capacity Low Ambient 740 11,860 800 24.4 Heating Capacity Power Supply 115V Single Phase 60Hz Heating CapacityTH Total Heating Capacity BTU/h Power Supply 230V Single Phase 60Hz Heating Capacity Cooling Electrical CharacteristicsElectrical Data HeatingVoltage230V Cooling Voltage208V Cooling18BT1U CS-KE12NB418FA2-5250-46900-2 Outdoor Unit CU-KE12NK1 8FA2-5251-12200-2 Controller Maintenance Address Setting of the Remote ControllerHow to Disconnect How to ConnectDisconnect the connectors in the control box Disassembly ProcedureRemove the air intake grill Remove the ceiling panel Remove the indoor air temperature sensor Remove the power box and control boxScrew Ground cable CN07 CN03 CN09 CN06 Remove the main body lower section Remove the drain pump and float switch Remove the heat exchanger sensorRemove the turbo fan and fan motor Remove the heat exchangerEmergency operation FunctionsOperation Functions Auto cooling/heating operationTimer backup Lamp colorsOverload prevention during heating Compressor discharge temperature controlProtective Functions Freeze preventionCT Peak current cut-off control Defrost detection and releaseReverse-Cycle Defrosting Precautions before Performing Inspection or Repair Troubleshooting Before Calling for ServiceMethod of Self-Diagnostics Self-diagnostics Lamps Indoor UnitReplace the controller Using the TEST/T-RUN terminalsChecking the Indoor and Outdoor Units Replace the circuit board or the fuseBefore the Operation Serial Communication Error Identification ProcedureOff Blinking Illuminated Condition E01From the previous page a Condition E12 Trouble Diagnosis of Fan Motor Indoor Fan MotorOutdoor Fan Motor Electromagnetic interference Noise Malfunction and Electromagnetic InterferenceNoise malfunction Locations most susceptible to noise Trouble CorrectionMeasurement of Insulation Resistance Power Supply CordChecking Electrical Components Measurement of Insulation Resistance for Electrical PartsChecking Continuity of Fuse on PCB Assy What is New Refrigerant R410A? Refrigerant R410A Special Precautions When Servicing UnitCharacteristics of New Refrigerant R410A CharacteristicsChecklist before Servicing Tubing Installation Procedures Tools Specifically for R410AProcedure for Replacing Compressor Case of Compressor MalfunctionExample Configuration and characteristics of cylindersAmount in the charging cylinder is less than 20% To prevent the compositionWelding leaking points Case Refrigerant is LeakingRecharging Retro-Fitting Existing Systems When Tubes are ExtendedCharging Additional Refrigerant Use of Existing UnitsPage Appendix a CU-3KE19NBU CU-4KE24NBU CU-4KE31NBU CS-KE12NB41CU-KE12NK1 CS-KE18NB4UW CU-KE18NKUCZ-18BT1U Safety Precautions FeaturesContents Product InformationElectrical Requirements Installation LocationSafety Instructions AvoidNames of Parts Unit Display and Operation ButtonRemote Controller Display SymbolsRemote Controller Mode selector button HR. Timer button 1-HOUR OFF TimerTemperature setting buttons Temp SensorUsing the Remote Controller Single/Multiple switchManual Operation Operation with the Remote ControllerAutomatic Operation StepHigh Power Mode Adjusting the Fan SpeedNight Setback Mode Fan OnlySetting the Timer Special RemarksHow to set daily ON/OFF repeat timer How to set the OFF timeHow to set the on time 1030 pm 710 am 1100 am Present timeHour OFF Timer Using the 1-HOUR OFF TimerAdjusting the Airflow Direction Operation together with the daily ON/OFF repeat timerCleaning the flaps Care and CleaningWhen the air conditioner is not running Cleaning the main unit and Remote ControllerAir filter How to remove the filterHow to remove the air intake grille Care After a prolonged idle periodWired Remote Controller TroubleshootingOperating Range Model No Outdoor Unit Indoor Unit SpecificationsFor Single use CS-KE12NB41Model No Indoor Unit Model No Outdoor UnitPage Appendix B Installation Instructions Installation Instructions Split System Air Conditioner ContentsPlease Read Before Starting Source, it can produce dangerously toxic gas When ServicingOthers Fins of the outdoor unit. You may get injuredGeneral Tools Required for Installation not suppliedAccessories Supplied with Unit Table Optional Copper Tubing KitInstallation Site Selection Additional Materials Required for InstallationSolid base must not cover Hole of the bottom plateSuspending the Indoor Unit How to Install the Indoor UnitPreparation for Suspending Placing the Unit Inside the CeilingFastener is on the side Installing the Drain Piping Attach so that the hose band Drain portChecking the Drainage 10aInstalling the Ceiling Panel Indoor unit Gaps Ceiling surface Ceiling panelWiring the Ceiling Panel and the Indicator Attaching the air-intake grilleAdjusting the Auto Flap Checking After InstallationWhen Removing the Ceiling Panel for Servicing Wiring Instructions General precautions on wiringDisconnect switch may be required by national or local codes Always comply with national and local code requirementsHow to connect wiring to the terminal For Indoor Unit Wiring Instructions for Inter-unit ConnectionsFor Outdoor Unit  For solid core wiring or F-cable First refer to . Installation Site Selection How to Install the Outdoor Unit For stranded wiring Wiring Instructions for the Outdoor UnitRefrigerant Tubing Flaring Procedure with a Flare ToolTo 0.5 mm Adjust so that the amount of tube Use of the Flaring MethodTaping the flare nuts Connecting Tubing between Indoor and Outdoor UnitsInsulation of Refrigerant Tubing Insulation materialTaping the Tubes Finishing the InstallationAir Purging  Air Purging with a Vacuum Pump for Test RunStem clockwise to close it again. Fig Soap with a clean clothDegrees 1/4 turn for 10 seconds, and then turn Be sure to completely insert the hexHow to Test Run the Air Conditioner  Basic Functions of the Service Valves  Pump Down Service Valve Connections Remote Controller Installation PositionAddress Switch Address Setting of the Remote ControllerAppendix C CZ-RD515UOperating Instructions Wired Remote Controller Model No. CZ-RD515UAutomatic Switching between Cooling and Heating Installation Location Timer and Present Time setting buttons SET buttonTimer Select button Remote Controller Display Automatic Operation Only for COOL/DRY/HEAT Model Remote Controller Display Heating Mode Only for COOL/DRY/HEAT ModelDaily on / OFF Backup functionProgrammed 910 pm 710 am 1130 pm Present timeUsing the 1-HOUR OFF Timer Page Appendix D Installation Instructions CZ-RD515U How to install the remote controller Parts supplied with the remote controllerRemote controller installation guidelines Installation locationInstalling with in-wall junction box Installing directly onto the wallHow to wire the remote controller How to Test Run the Air Conditioner WI1011-0Page DC1111-0
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CZ-18BT1U, CS-KE12NB41, CS-KE18NB4UW, CU-KE18NKU, CU-KE12NK1 specifications

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