Mitsubishi Electronics PCFY-P36NKMU-E, PCFY-P15NKMU-E, PCFY-P30NKMU-E Sensor signal check

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7-1-3. DC Fan motor (fan motor/indoor controller circuit board)

Check method of DC fan motor (fan motor/indoor controller circuit board)

Notes

·High voltage is applied to the connecter (CNMF) for the fan motor. Pay attention to the service.

·Do not pull out the connector (CNMF) for the motor with the power supply on.

(It causes trouble of the indoor controller circuit board and fan motor.) Self check

Symptom : The indoor fan cannot turn around.

Wiring contact check

Contact of fan motor connector (CNMF)

Is there contact failure?

Yes

Wiring recovery

No

Power supply check (Remove the connector (CNMF))

Measure the voltage in the indoor controller circuit board.

TEST POINT : VDC (between 1 (+) and 4 (-) of the fan connector): VDC DC294~325V

TEST POINT : VCC (between 5 (+) and 4 (-) of the fan connector): VCC DC15V

Is the voltage normal?

No

Yes

Indoor controller board fuse check

No

Is the fuse normal?

Replace the fuse

OK

Sensor signal check

Measure the voltage between CNMF  and DC 0V and DC 15V in the indoor controller circuit board.

Does the voltage repeat

 

No

 

 

DC 0V and DC 15V?

 

 

Yes

 

 

Replace indoor

 

 

controller board

 

 

 

OK

 

 

 

Check the operation

 

END

NG

 

 

Yes

Replace indoor controller board.

OK

Check the operation

NG

Replace the fan motor

Replace the fan motor

OK

Check the operation

NG

Check the operation

NG

END

END

END

Replace the fan motor.

Replace indoor controller board.

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Contents Parts Catalog OCB450 ContentsPart Names and Functions Wired remote controller Specifications SpecificationSound Level Electrical Parts SpecificationsPCFY-P15NKMU-E PCFY-P24NKMU-E NC CurvesCmmcfm How to read curvesFront View Pcfy Gas pipe side/flared connection PCFY-P15, 24, 30, 36NKMU-E Wiring DiagramØ12.7 1/2 Ø15.88 5/8 Refrigerant System DiagramUnit mm inch Service Ref PCFY-P15NKMU-E PCFY-P24NKMU-E PCFY-P30NKMU-E PCFY-P36NKMU-EIndoor Unit Control 6-1. Cool Operation How to operateRoom temperature Desired temperature Microprocessor ControlFloat switch control Drain pump Same control as Cool operation Vane DRY OperationPressed one time. Dry 67 to 87F Control modes Control details Remarks Thermo regulatingFAN Operation Fan Control details Heat OperationPressed one time. Heating 63 to 83F Display in Heat operation DefrostFrom the preceding Control modes Control details Remarks Fan Thermo OFF modeAuto Operation Automatic COOL/HEAT Change Over Operation When Unit is StoppedDown TroubleshootingLinear expansion valve Valve Trouble shootingClosing a valve 1 → 2 → 3 → 4 → Become OFFSensor signal check Function of DIP Switch How to set branch number SW14 Series R2 only High ceiling On SWA settingHow to set address Switch Match the indoor unit’s refrigerant pipe with the BCPattern a Switch PoleOperation by switch Effective JumperPCFY-P15NKMU-E PCFY-P24NKMU-E PCFY-P30NKMU-E PCFY-P36NKMU-E Test Point DiagramSW1 PCFY-P30NKMU-E PCFY-P36NKMU-E Disassembly ProcedureOperating Procedure Photos & Illustrations PCFY-P15NKMU-E PCFY-P24NKUM-ERemoving the fan motor and right side fan Removing the room temperature thermistor TH21Side panel by sliding the panel to the front Removing the fan 3 connectionRemoving the side panel Remove the screw from the side panel, and removeRemoving the drain pan Removing the vane motorRemoving the under panel Removing the Auto vane Removing the pipe thermistors/Liquid TH22 and GasTH23 Removing the guide vaneRemove the heat exchanger with LEV Removing the heat exchanger and LEVRemove 2 screws from the heat exchanger Page New publication, effective Feb

PCFY-P30NKMU-E, PCFY-P36NKMU-E, PCFY-P24NKMU-E, PCFY-P15NKMU-E specifications

Mitsubishi Electronics is renowned for its innovative solutions in the field of heating, ventilation, and air conditioning (HVAC) systems. Among its impressive lineup, the PCFY-P series of ceiling-mounted air conditioning units stands out for its advanced features, technologies, and efficient performance. The models PCFY-P15NKMU-E, PCFY-P24NKMU-E, PCFY-P36NKMU-E, and PCFY-P30NKMU-E cater to various cooling and heating needs, making them suitable for both residential and commercial applications.

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