Sanyo C1872, C2472, CL2472, CL1872 service manual Outdoor Fan Motor

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10-4-2. 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.

To perform diagnosis, follow the instructions in "(2) Checking the Outdoor Unit" on the previous page and set the outdoor unit to Test Run mode (compressor ON, outdoor fan motor ON).

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 follow the instructions in "Checking the Outdoor Unit" and again set the unit to 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 230V 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 KS1872 + C1872 + CL1872 KS2472 + C2472 + CL2472 DC Inverter Split System AIR ConditionerPlease Read Before Starting Table of Contents Checking Electrical Components Models KS1872 + CL1872 KS2472 + CL2472 Operating RangeModels KS1872 + C1872 KS2472 + C2472 C1872 Unit SpecificationsKS1872 208V Single-Phase 60Hz C2472 KS2472KS2472 CL1872 KS1872 CL2472 KS2472 Indoor Unit Major Component SpecificationsCB-KS2472 Outdoor Unit Outdoor Unit C2472 Outdoor Unit CL1872 Outdoor Unit CL2472 Indoor heat exchanger sensor Other Component SpecificationsCompressor temp sensor Outdoor air temp sensorDimensional Data Outdoor Unit C1872 Outdoor Unit C2472 Refrigerant Flow Diagram Refrigerant Flow DiagramIndoor unit Outdoor unit Curve because it can cause the tube to break or crackPerformance Data Temperature ChartsIndoor Unit KS1872 Outdoor Unit CL1872 Indoor Unit KS2472 Outdoor Unit C2472 Indoor Unit KS2472 Outdoor Unit CL2472 Air Throw Distance Charts Cooling C1872 Cooling Electrical CharacteristicsC2472 Cooling CL2472Indoor Unit KS1872 KS2472 Electric Wiring DiagramsController Outdoor Unit C1872 CL18728FA2-5257-68700-3 8FA2-5257-68400-3 Installation Site Selection C2472, CL2472 C1872, CL1872AWG Recommended Wire Length and DiameterTo take out the remote control unit, pull it forward Remote Control Unit Installation PositionHow to Test Run the Air Conditioner How to replace the grille Remove the Grille to Install the Indoor UnitHow to remove the grille Address Setting of the Remote Control Unit MaintenanceHow to Connect How to DisconnectOperation Functions FunctionsHigh Power Freeze prevention Protective FunctionsMethod of Self-Diagnostics TroubleshootingPrecautions before Performing Inspection or Repair S01 Self-diagnostics LampsReplace the circuit board or the fuse Replace the controllerChecking the Indoor and Outdoor Units Using the TEST/T-RUN terminalsChecking the indoor unit Control Check items unit operation Checking the serial communicationsDiagnostic results Diagnostic procedureRemedy for symptom 3 to Trouble Diagnosis of Fan MotorOutdoor Fan Motor Electromagnetic interference Noise Malfunction and Electromagnetic InterferenceNoise malfunction Measurement of Insulation Resistance Checking Electrical ComponentsChecking Continuity of Fuse on PCB Assy Characteristics of New Refrigerant R410A Refrigerant R410A Special Precautions When Servicing UnitChecklist before Servicing Tools Specifically for R410A Tubing Installation ProceduresFor servicing, use the following tools for R410A Tool Distinction Tool NameCase of Compressor Malfunction Recharging Configuration and characteristics of cylindersNever charge a large amount Unit. This may causeWelding leaking points Case Refrigerant is LeakingRetro-Fitting Existing Systems Charging Additional RefrigerantKS1872 + C1872 + CL1872 KS2472 + C2472 + CL2472 Features Product Information ContentsAlert Symbols Electrical Requirements Installation LocationSafety Instructions Names of Parts Quiet lamp Unit Display and Operation ButtonRemote Control Unit Display HR. Timer button Remote Control UnitAdvance button TransmitterDRY ACL button ALL Clear Using the Remote Control UnitHow to Install Batteries Using the Remote Control Unit Operation Operation with the Remote Control UnitPress the ON/OFF operation button Operation with the Remote Control UnitNight Setback Mode is used for saving energy Cooling and DRY ModeQuiet Mode Clicking sound is heard from the air conditioner Power failure during operationSpecial Remarks Operation Indication Setting the Timer1030 pm 710 am 1100 am Present time Setting the TimerTo cancel a timer program Press the Cancel button Setting procedure Using the 1-Hour OFF TimerCancellation procedure Operation together with the Daily ON/OFF Repeat TimerSetting the airflow manually Adjusting the Airflow DirectionHorizontal Sweep functionWhen the air conditioner is not running Care and CleaningOperation without the Remote Control UnitCleaning Care and CleaningWashing the grille with water Air clean filter How to clean the air clean filterFilter Negative ion generator metal electrodes inside plastic caseTrouble Possible Cause Remedy TroubleshootingOperating Range

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