29
9
TROUBLESHOOTING
9-1. HOW TO CHECk THE PARTS
Parts name
Check points
Disconnect the connector then measure the resistance with a tester. (At the ambient temperature 50 to 86
_
F)
Refer to “9-1-1. Thermistor”.
Room temperature detection
thermistor (TH21)
Pipe temperature detection
thermistor/liquid (TH22)
Pipe temperature detection
thermistor/gas (TH23)
Normal
4.3 to 9.6 k
"
Abnormal
Open or short
Measure the resistance between the terminals using a tester.
Drain pump (DP)
Drain float switch (FS)
State of moving part
Abnormal
DOWN
Other than open
UP
Normal
Open
Short
Other than short
Measure the resistance between the terminals with a tester. (At the ambient temperature of 68 to 86°F)
Vane motor (MV)
Linear expansion valve
(LEV)
MV
Fan motor (MF)
Refer to “
9-1-3. DC Fan motor (fan motor/indoor controller board)”.
Red
Purple
Black
Normal
Connector
Abnormal
300
"
Open or short
Red–Yellow (
5
–
3
,
0
–
8
,
5
–
3
,
)
–
8
)
Red–Blue (
5
–
1
,
0
–
6
,
5
–
1
,
)
–
6
)
Red–Orange (
5
–
4
,
0
–
9
,
5
–
4
,
)
–
9
)
Red–White (
5
–
2
,
0
–
7
,
5
–
2
,
)
–
7
)
1
Check if the drain float switch works properly.
2
Check if the drain pump works and drains water properly in cooling operation.
3
If no water drains, confirm that the check code 2502 will not be displayed 10 minutes after the operation starts.
Note: The drain pump for this model is driven by the internal DC motor of controller board, so it is not possible to measure the
resistance between the terminals.
Normal
Red–
Black: Input 13 V DC →
The
fan starts to rotate.
Purple–Black: Abnormal (check code 2502) if it outputs 0–13 V square wave (5 pulses/rotation), and the number of rotation is not normal.
Abnormal
Open or short
White–Red
Yellow–Brown
Orange–Red
Blue–Brown
Connector
Normal
200
"
± 10%
Disconnect the connector then measure the resistance with a tester. (At the coil temperature 50 to 86
_
F)
Refer to “9-1-2. Linear expansion valve”.
2
1
Moving part
4
3
Switch
Magnet
Moving
Part
Yellow
Blue
Red
Orange
White
1
2
3
LEV
Brown
CN60
Blue
1
2
3
4
5
6
Orange
White
Red
Yellow
PLFY-P08NEMU-E PLFY-P12NEMU-E PLFY-P15NEMU-E PLFY-P18NEMU-E
PLFY-P24NEMU-E PLFY-P30NEMU-E PLFY-P36NEMU-E PLFY-P48NEMU-E
OCH611D
