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

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