Mitsubishi Electric City Multi PLFY Series Technical & Service Manual page 19

8-2. HOW TO CHECK THE PARTS
PLFY-P15VFM-E1R1.TH
PLFY-P32VFM-E1R1.TH
Parts name
Thermistor (TH21)
(Room temperature detection)
Thermistor (TH22)
(Pipe temperature detection/Liquid)
Thermistor (TH23)
(Pipe temperature detection/Gas)
Vane motor (MV)
White
M
Orange
Red
Blue Yellow
Linear expansion
valve (LEV)
Blue
Brown
M
Yellow
White
Red
Orange
Drain pump (DP)
1 Red
Purple
2
Black
3
Drain float switch (FS)
Moving part
1
2
3
4
i-see Sensor *
1 2 3 4
1 2 3 4
i-see Sensor motor *
White
M
Orange
Red
Blue
* i-see Sensor is available with optional "i-see Sensor corner panel" (SLP-2FAE, SLP-2FALE, and SLP-2FALME).
TCH061
TCH061.indd 19 TCH061.indd 19
PLFY-P20VFM-E1R1.TH
PLFY-P40VFM-E1R1.TH
Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature 10 to 30:)
Normal
4.3 to 9.6 k"
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20 to 30:)
Red–Yellow Red–Blue
Disconnect the connector then measure the valve resistance with a tester.
White-Red Yellow-Brown Orange-Red
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 rotaion is not normal.
Measure the resistance between the terminals with a tester.
State of moving part
UP
DOWN
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 boad 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.
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20 to 30°C)
Red–Yellow Red–Blue
Yellow
Check points
Abnormal
Refer to "8-2-1. Thermistor Caracteristic Graph".
Open or short
Normal
Red–Orange Red–White
300 "
Normal
Blue-Brown
200" i10%
Normal Abnormal
Short Other than short
Open Other than open
Normal
Red–Orange Red–White
250 "
19 19
PLFY-P25VFM-E1R1.TH
PLFY-P50VFM-E1R1.TH
Abnormal
Open or short
Abnormal
Refer to "8-2-2. Linear
Expansion Valve".
Open or short
Switch
Magnet
Moving
Part
Abnormal
Open or short
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