27
OCH715
27
TROUBLESHOOTING
9
9-1. HOW TO CHECK THE PARTS
PKFY-P04NLMU-E.TH
PKFY-P06NLMU-E.TH
PKFY-P08NLMU-E.TH
PKFY-P12NLMU-E.TH
PKFY-P15NLMU-E.TH
PKFY-P18NLMU-E.TH
Parts name
Check points
Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature 10
to
30
:
)
Disconnect the connector then measure the resistance valve with a tester. (Coil temperature 20
:
)
Vane motor (MV1)
Linear expansion valve (LEV)
Refer to “8-1-1. 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
"
Normal
200
"
±10%
(1)-(5)
White-Red
(2)-(6)
Yellow-Brown
(3)-(5)
Orange-Red
(4)-(6)
Blue-Brown
Measure the resistance between the terminals with a tester. (At the ambient temperature 25
:
)
Normal
300
"
±7%
-
9
Red-Sky Blue
-
8
Red-Sky Blue
-
7
Red-Sky Blue
-
6
Red-Sky Blue
Refer to “8-1-3. DC Fan motor (fan motor/indoor controller board)
Fan motor (MF)
Abnormal
Other than short
Other than open
Other than short
State of moving part
UP
DOWN
–
Normal
Short
Open
Short
Sky Blue
Sky Blue
Red
Sky
Blue
7
9
10
6
8
Connector(CNV)
pin No.
M
1
2
3
4
5
6
LEV
White
Yellow
Orange
Blue
Red
Brown
CN60
Sky
Blue
10
10
10
10
Vane motor (Lower (MV2))
Measure the resistance between the terminals with a tester. (At the ambient temperature 25
:
)
Normal
300±26.3
"
5
-
4
Red-Sky Blue
5
-
3
Red-Sky Blue
5
-
2
Red-Sky Blue
5
-
1
Red-Sky Blue
Sky Blue
Sky Blue
Red
Sky
Blue
2
4
5
3
1
M
Connector(CNV)
pin No.
Sky
Blue
Drain pump (DP)
Drain float switch (FS)
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, so it is not possible to
measure the resistance between the terminals.
Normal: Red–Black: Input 13 V DC → The pump motor starts to rotate.
Measure the resistance between the terminals with a tester.
RD
VT
BK
1
2
3
2
1
Moving part
4
3
Magnet
Moving
Part
(Optional parts)
(Optional parts)
Drain float switch
connector terminal
1
(+) –
2
(-)
1
(+) –
2
(-)
3
(+) –
4
(-)
