Mitsubishi Electric PLFY-P20VFM-E1 Technical & Service Manual page 19

8-2. HOW TO CHECK THE PARTS
PLFY-P15VFM-E1.TH
PLFY-P32VFM-E1.TH
Parts name
Thermistor (TH21)
Disconnect the connector then measure the resistance with a tester.
(Room temperature detection)
(At the ambient temperature 10 to 30:)
Thermistor (TH22)
(Pipe temperature detection/Liquid)
Thermistor (TH23)
(Pipe temperature detection/Gas)
Measure the resistance between the terminals with a tester.
Vane motor (MV)
(At the ambient temperature 20 to 30:)
White
M
Red–Yellow
Orange
Red
Blue Yellow
Linear expansion
Disconnect the connector then measure the valve resistance with a tester.
valve (LEV)
Blue
Brown
M
Yellow
White
Red
Orange
Drain pump (DP)
1 Check if the drain float switch works properly.
2 Check if the drain pump works and drains water properly in cooling operation.
1 Red
3 If no water drains, confirm that the check code 2502 will not be displayed 10 minutes after the
Purple
2
Black
3
Note: The drain pump for this model is driven by the internal DC motor of controller board, so it is not
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
Drain float switch (FS)
Measure the resistance between the terminals with a tester.
Moving part
State of moving part
1
2
3
4
i-see sensor * 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.
1 2 3 4 Note: The voltage between the terminals cannot be measured accutately since it is pulse output.
1 2 3 4
i-see sensor motor *
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20 to 30°C)
White
M
Orange
Red–Yellow
Red
Yellow
Blue
* i-see sensor is available with optional "i-see sensor corner panel" (SLP-2FAE, SLP-2FALE, and SLP-2FALME).
OCH617
PLFY-P20VFM-E1.TH
PLFY-P40VFM-E1.TH
Normal Abnormal
4.3 to 9.6 k" Open or short
Normal
Red–Blue Red–Orange
300 "
Normal
White-Red Yellow-Brown Orange-Red
200" i10%
operation starts.
possible to measure the resistance between the terminals.
the number of rotaion is not normal.
Normal
UP Short
DOWN Open
Normal
Red–Blue Red–Orange
250 "
PLFY-P25VFM-E1.TH
PLFY-P50VFM-E1.TH
Check points
Refer to "8-2-1. Thermistor Caracteristic Graph".
Abnormal
Red–White
Open or short
Abnormal
Blue-Brown
Open or short
Abnormal
Other than short
Other than open
Abnormal
Red–White
Open or short
19 19
Refer to "8-2-2. Linear
Expansion Valve".
Switch
Magnet
Moving
Part