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10
TROUBLESHOOTING
10-1. HOW TO CHECK THE PARTS
PLFY-P12/15/18/24/30/36NBMU-E PLFY-P12/15/18/24/30/36NBMU-ER1
Parts name Check points
Disconnect the connector then measure the resistance using a tester.
(At the ambient temperature 50"F~86"F)
(Refer to the next page for a detail.)
Room temperature
thermistor (TH21)
Liquid pipe thermistor
(TH22)
Gas pipe thermistor
(TH23)
Normal
4.3k~9.6k
Abnormal
Open or short
Measure the resistance between the terminals using a tester.
(Winding temperature 68°F)
Measure the resistance between the terminals using a tester.
Drain pump (DP)
i-see sensor
(Option)
Drain float switch (FS)
1
3
YLW
YLW
Normal Abnormal
290 Open or short
State of moving part Abnormal
DOWN Other than open
UP
Normal
Open
Short Other than short
Measure the resistance between the terminals using a tester.
(At the ambient temperature of 68°F~86°F)
Vane motor (MV)
Vane motor for
i-see sensor (Option)
Abnormal
Open or short
Red - Yellow (-, -, -, -)
Red - Blue (-, -, -, -)
Red - Orange (-, -, -, -)
Red - White (-, -, -, -)
Connector
Normal
300
Measure the resistance between the terminals using a tester.
(At the ambient temperature of 68°F~86°F)
Abnormal
Open or short
Red - Yellow
Red - Blue
Red - Orange
Red - White
Connector
Normal
250
Disconnect the connector then measure the resistance valve using a tester.
Linear expansion
valve (LEV)
Abnormal
Open or short
Normal
150k $10%
White-Red Yellow-Brown Orange-Red Blue-Brown
Orange
Red
White
Blue
Brown
Yellow
M
Refer to 8-1-2.
Normal
Do not disassemble corner panel
with i-see sensor.
Black plastic tape
Turn on the indoor unit with the black plastic tape on the outside of i-see sensor controller board.
With electricity being turned on, measure the power voltage between connectors with tester.
i-see sensor rotates then pull out the connector of motor for i-see sensor.
Abnormal
DC 1.857V~ 3.132V Other than the normal
DC 0.939V~ 1.506V
(–)—(+)
i-see sensor connector
i-see sensor (At the ambient temperature of 50°F~104°F)
NOTE : Be careful of handing such a static electricity.
(+)—(–) Other than the normal
4321
43 1
Blue
Black
Pink
Brown
2
2
1
Moving part
4
3
Switch
Magnet
Moving
Part
Yellow
Blue
Red
Orange
White
Yellow
Blue
Red
Orange
White