Mitsubishi Electronics PMFY-P12NBMU-E, PMFY-P08NBMU-E1 Troubleshooting, Replace the fan motor

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9-2. TROUBLESHOOTING

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

1Notes

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

·Do not pull out the connector (FAN) for the motor with the power supply on, doing so may result in damage to the board.

2Self check

Conditions : The indoor fan does not rotate.

Turn OFF the power supply.

Wiring contact check

Contact of fan motor connector (FAN)

Contact of power supply cable.

Was contact good?

No

Correct wiring connection.

 

Yes

 

 

Fan motor check

Measure the resistance between the fan motor connecter 1(+) and 3(–). (With the connector pulled out from the board)

Is the resistance 1M" or more?

No

Replace the fan motor.

 

Yes

Turn ON the power supply. Power supply check

Check the voltage of the indoor controller board with the connector (FAN) connected to the board. Approx. 294~325V DC between the connecter (FAN) 1(+) and 3(–)

Is the voltage normal?

No

Indoor controller board fuse check

 

 

 

Yes

 

Turn off the power supply and check if there is

 

 

any broken wire by using a tester.

 

 

 

No

Replace the fuse.

 

 

Is the fuse normal?

Yes

Replace the indoor controller board.

Fan motor position sensor signal check

Rotate the fan motor more than one turn slowly and check the voltage between

the connector (FAN) 6(+) and 3(–) with the connector (FAN) connected to the board.

Does the voltage repeat 0V DC and 15V DC ?

No

Replace the fan motor.

Yes

 

Replace the indoor controller board.

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Contents Revised EDITION-B ContentsTechnical Changes FeaturesReturns air from room Part Names and FunctionsRemove dust and pollutants from return air ˚F˚C Display SectionSpecifications SpecificationWNote Refer to Wiring Diagram for the supplied voltage Electrical Parts SpecificationsOperation in conjunction with duct fan Booster fan How to read curvesAIR Capacity Taken from Outside PMFY-P12NBMU-E Noise Criterion Curves PMFY-P06NBMU-EPMFY-P15NBMU-E PMFY-P08NBMU-ETop Installation space required aroundRight side IndoorPMFY-P06NBMU-E PMFY-P08NBMU-E Wiring DiagramE1PMFY-P15NBMU-E1 PMFY-P06NBMU-E1PMFY-P08NBMU-E1Pmfy Unitin.mm Refrigerant System DiagramPressed once. Cooling 67 to 87F How to operateMicroprocessor Control Indoor Unit Control 8-1. Cool OperationBasic control system Control modes Drain pump VaneDrain sensor function Drain pump Same control as Cool operation Vane Desired temperatureDRY Operation Pressed once. Dry 67 to 87FFAN Operation On the vanes downward blow settingDisplay in Heat operation Defrost Heat OperationPressed once. Heating 63 to 83F From the preceding Auto Operation Automatic COOL/HEAT Change Over Operation When Unit is StoppedTrouble Shooting Operation summary of the linear expansion valve Linear expansion valveLinear expansion valve operation Output PhaseTrouble shooting Indoor controller board fuse check Yes TroubleshootingAny broken wire by using a tester Replace the fuse Replace the fan motorFunction of DIP Switch SW12 Switch Pole SW11SW14 Switch Operation by switch EffectiveSW4 Operating Procedure PHOTOS&ILLUSTRATIONS Disassembly ProcedureRemoving the vane motor Removing the electrical parts boxRemoving the nozzle Removing the fan motor and line flow fan Removing the thermistorRoom temperature detectionRemoving the drain pump E11 003 Part Name SpecificationQty/set Remarks Drawing NoPart number that is circled is not shown in the figure Electrical Parts PMFY-P06NBMU-E PMFY-P08NBMU-E E04 RoHSE16 R01 E01 E07 E14 E15R01 E01 079 R01 23A 102R01 E04 103 R01 E32 114R01 E21 246 Qty/setE41 716 R01 E27 246Made in Japan

PMFY-P08NBMU-E, PMFY-P12NBMU-E1, PMFY-P08NBMU-E1, PMFY-P06NBMU-E, PMFY-P12NBMU-E specifications

Mitsubishi Electronics has long been a pioneer in the field of air conditioning and climate control technologies. Among their impressive lineup of products is the PMFY series, which includes models such as the PMFY-P06NBMU-E1, PMFY-P12NBMU-E, PMFY-P06NBMU-E, PMFY-P08NBMU-E1, and PMFY-P12NBMU-E1. These advanced air conditioning systems are engineered to offer optimal comfort, energy efficiency, and innovative features for both residential and commercial applications.

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The PMFY models also boast a sleek and modern design, ensuring they blend seamlessly with any interior décor. Compact and lightweight, they can be installed in various settings, maximizing available space without compromising on performance.

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Lastly, the PMFY series is designed to be robust and reliable, with components that are engineered for durability and long life. Mitsubishi Electronics stands behind their products with comprehensive warranties, providing peace of mind and exceptional customer service.

In summary, the Mitsubishi Electronics PMFY-P06NBMU-E1, PMFY-P12NBMU-E, PMFY-P06NBMU-E, PMFY-P08NBMU-E1, and PMFY-P12NBMU-E1 are exemplary models that embody the essence of innovation, efficiency, and reliability. They represent the ideal choice for those seeking advanced climate control solutions suitable for a variety of spaces.
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