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9-6. HOW TO CHECK THE PARTS
PLA-ZM35EA.UK PLA-ZM50EA.UK PLA-ZM60EA.UK PLA-ZM71EA.UK
PLA-ZM100EA.UK PLA-ZM125EA.UK PLA-ZM140EA.UK
Drain float switch (FS)
2
1
Moving part
4
3
Measure the resistance between the terminals with a tester.
State of moving part
Abnormal
DOWN Other than open
UP
Normal
Open
Short Other than short
Switch
Magnet
Moving
Part
i-see Sensor (Option)
i-see Sensor motor
(Option)
Orange
Red
White
Blue
Yellow
M
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20 to 30°C)
Room temperature
thermistor (TH1)
Condenser/evaporator
temperature thermistor (TH5)
Measure the resistance with a tester.
(Parts temperature 10 to 30°C)
Pipe temperature
thermistor/liquid (TH2)
Check method and criterion
Parts name
Normal
4.3 to 9.6 k"
Abnormal
Opened or short-circuited
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20 to 30°C)
Vane motor (MV)
Drain pump (DP)
NormalConnector Abnormal
300 " Open or short
Orange
Red
White
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)
Blue
Yellow
M
1
2
3
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 P5 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 →Themotor starts to rotate.
Purple–Black: Abnormal (check code P5) if it outputs 0–13 V square wave (5 pulses/rotation), and
the number of rotation is not normal.
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.
250 "
AbnormalNormal
Red–Yellow Red–Blue Red–Orange
Open or short
Red–White
Refer to “9-6-1 Thermistor”.
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