Mitsubishi Electronics PCFY-P15NKMU-E, PCFY-P30NKMU-E, PCFY-P24NKMU-E Troubleshooting, Down

Page 20

7 TROUBLESHOOTING

7-1. HOW TO CHECK THE PARTS

PCFY-P15NKMU-E PCFY-P24NKMU-E PCFY-P30NKMU-E PCFY-P36NKMU-E

 

 

 

 

 

 

 

Parts name

 

 

 

 

 

 

 

 

 

Check points

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Room temperature

 

 

 

 

Disconnect the connector then measure the resistance using a tester.

 

thermistor

(TH21)

(At the ambient temperature 50"F~86"F)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Liquid pipe thermistor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(TH22)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Normal

 

 

Abnormal

 

 

(Refer to the next page for a detail.)

 

Gas pipe thermistor

 

 

 

 

 

4.3k~9.6k

 

 

Open or short

 

 

 

 

 

 

 

 

 

 

 

(TH23)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Vane motor (MV)

 

 

 

 

Measure the resistance between the terminals using a tester.

 

White

 

 

 

 

 

 

 

(At the ambient temperature of 68°F~86°F)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Connector

 

 

 

Normal

 

 

Abnormal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Red - Yellow

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Orange

 

 

 

 

 

 

 

Red - Blue

 

300

 

 

Open or short

 

 

 

 

 

 

 

 

 

 

 

Red

 

 

 

 

 

 

 

Red - Orange

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Blue

Yellow

Red - White

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Drain pump (DP) (Option)

Measure the resistance between the terminals using a tester.

 

 

 

 

 

 

 

 

 

YLW

 

 

 

 

(Winding temperature 68°F)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Normal

 

 

 

Abnormal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YLW

3

 

 

290

 

 

 

Open or short

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Drain float switch (FS)

Measure the resistance between the terminals using a tester.

 

 

 

 

 

 

 

 

 

(Option)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Switch

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Moving part

State of moving part

 

Normal

 

 

Abnormal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Magnet

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

UP

 

Short

 

Other than short

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

DOWN

 

Open

 

Other than open

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Moving

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Part

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

i-see sensor

 

 

 

 

Turn on the indoor unit with the black plastic tape on the outside of i-see sensor controller board.

 

(Option)

 

 

 

 

 

 

 

i-see sensor rotates then pull out the connector of motor for i-see sensor.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

With electricity being turned on, measure the power voltage between connectors with tester.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Black plastic tape

 

 

4

3

2

1

 

 

i-see sensor (At the ambient temperature of 50°F~104°F)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

3

2

1

 

 

i-see sensor connector

Normal

Abnormal

 

 

 

(–)—(+)

DC 1.857V~ 3.132V

Other than the normal

 

Blue

BlackPink Brown

 

 

 

 

 

 

 

 

 

 

 

(+)— (–)

DC 0.939V~ 1.506V

Other than the normal

NOTE : Be careful of handing such a static electricity.

Vane motor for

 

Measure the resistance between the terminals using a tester.

 

 

i-see sensor (Option)

(At the ambient temperature of 68°F~86°F)

 

 

 

White

 

Connector

 

Normal

Abnormal

 

 

 

 

Red - Yellow

 

 

 

 

 

Orange

 

Red - Blue

 

250

Open or short

 

 

 

Red - Orange

 

 

 

Red

 

 

 

 

 

 

Yellow

Red - White

 

 

 

 

 

Blue

 

 

 

 

 

 

Linear expansion

 

Disconnect the connector then measure the resistance valve using a tester.

 

 

valve (LEV)

Blue

 

Normal

 

Abnormal

Refer to 7-1-2.

 

Brown

 

 

M

White-Red

Yellow-Brown

Orange-Red

Blue-Brown

 

 

 

Open or short

 

 

 

 

 

Yellow

 

200 $10%

 

 

 

 

 

 

 

 

 

 

 

 

 

White Red Orange

 

 

 

 

 

 

 

20

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Contents Contents Parts Catalog OCB450Part Names and Functions Wired remote controller Specification SpecificationsElectrical Parts Specifications Sound LevelNC Curves PCFY-P15NKMU-E PCFY-P24NKMU-EHow to read curves CmmcfmFront View Pcfy Gas pipe side/flared connection Wiring Diagram PCFY-P15, 24, 30, 36NKMU-ERefrigerant System Diagram Unit mm inch Service RefPCFY-P15NKMU-E PCFY-P24NKMU-E PCFY-P30NKMU-E PCFY-P36NKMU-E Ø12.7 1/2 Ø15.88 5/8How to operate Room temperature Desired temperatureMicroprocessor Control Indoor Unit Control 6-1. Cool OperationFloat switch control DRY Operation Pressed one time. Dry 67 to 87FControl modes Control details Remarks Thermo regulating Drain pump Same control as Cool operation VaneFAN Operation Heat Operation Pressed one time. Heating 63 to 83FDisplay in Heat operation Defrost Fan Control detailsControl modes Control details Remarks Fan Thermo OFF mode From the precedingWhen Unit is Stopped Auto Operation Automatic COOL/HEAT Change Over OperationTroubleshooting DownLinear expansion valve Trouble shooting Closing a valve 1 → 2 → 3 → 4 →Become OFF ValveSensor signal check Function of DIP Switch High ceiling On SWA setting How to set addressSwitch Match the indoor unit’s refrigerant pipe with the BC How to set branch number SW14 Series R2 onlySwitch Pole Operation by switch EffectiveJumper Pattern aTest Point Diagram PCFY-P15NKMU-E PCFY-P24NKMU-E PCFY-P30NKMU-E PCFY-P36NKMU-ESW1 Disassembly Procedure Operating Procedure Photos & IllustrationsPCFY-P15NKMU-E PCFY-P24NKUM-E PCFY-P30NKMU-E PCFY-P36NKMU-ERemoving the room temperature thermistor TH21 Removing the fan motor and right side fanRemoving the fan 3 connection Removing the side panelRemove the screw from the side panel, and remove Side panel by sliding the panel to the frontRemoving the drain pan Removing the vane motorRemoving the under panel Removing the pipe thermistors/Liquid TH22 and Gas TH23Removing the guide vane Removing the Auto 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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In summary, the Mitsubishi Electronics PCFY-P15NKMU-E, PCFY-P24NKMU-E, PCFY-P36NKMU-E, and PCFY-P30NKMU-E offer exceptional efficiency, quiet operation, air quality improvement, smart technology integration, and sustainable design. These characteristics position the PCFY-P series as a leading choice in the HVAC market, providing reliable comfort solutions for a variety of settings. Each model exemplifies Mitsubishi's commitment to innovation and performance, making them a valuable asset for climate control needs.
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