27
27
OCH728A
26
TROUBLESHOOTING
8
Parts name
Checkpoints
Disconnect the connectors, then measure the resistance with a tester.
(At ambient temperatures of 10 to 30
:
)
Measure the resistance between the terminals with a tester.
Drain pump (DP)
i-see Sensor
Drain float switch (FS)
(Refer to “8-1-1. Thermistor”.)
Room temperature
detection thermistor (TH21)
Pipe temperature detection
thermistor/liquid (TH22)
Pipe temperature detection
thermistor/gas (TH23)
Normal
4.3–9.6 k
"
Abnormal
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 with a tester.
(At ambient temperatures of 20
to 30
:
)
Vane motor (MV)
i-see Sensor motor
(MT) (Option)
Abnormal
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
)
Connector
Normal
300
"
Measure the resistance between the terminals with a tester.
(At ambient temperatures of 20 to 30°C)
Abnormal
Open or short
Red - Yellow
Red - Blue
Red - Orange
Red - White
Connector
Normal
250
"
Abnormal
White-Red
Yellow-Brown
Orange-Red
Blue-Brown
Connector
Normal
Disconnect the connector then measure the resistance valve with a tester.
(At the coil temperatures of 10 to 30°C)
Linear expansion
valve (LEV)
Refer to “8-1-2. Linear expansion valve”.
Red
Purple
Black
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, 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.
200
"
± 10%
Open or short
2
1
Moving part
4
3
Switch
Magnet
Moving part
Yellow
Blue
Red
Orange
White
Yellow
Blue
Red
Orange
White
1 2 3 4
1 2 3 4
Black
Black
Black
Black
Turn the power ON while the i-see Sensor connector is connected to the CN4Z on indoor
controller board. A communication between the indoor controller board and i-see Sensor
board is made to detect the connection.
Normal: When the operation starts, the motor for i-see Sensor is driven to rotate the i-see Sensor.
Abnormal: The motor for i-see Sensor is not driven when the operation starts.
Note: The voltage between the terminals cannot be measured accurately since it is pulse output.
1
2
3
LEV
Brown
CN60
Blue
1
2
3
4
5
6
Orange
White
Red
Yellow
PLFY-M20VEM-(E/ET)
PLFY-M25VEM-(E/ET)
PLFY-M32VEM-(E/ET)
PLFY-M40VEM-(E/ET)
PLFY-M50VEM-(E/ET)
PLFY-M63VEM-(E/ET)
PLFY-M80VEM-(E/ET)
PLFY-M100VEM-(E/ET)
PLFY-M125VEM-(E/ET)
8-1. HOW TO CHECK THE PARTS
