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Mitsubishi Electric SLZ Series Technical & Service Manual page 26

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8-7. TROUBLESHOOTING OF MAIN PARTS
SLZ-KF09NA.TH    SLZ-KF12NA.TH    SLZ-KF15NA.TH    SLZ-KF18NA.TH
Parts name
Room temperature
thermistor (TH1)
Pipe temperature
thermistor/liquid (TH2)
Condenser/evaporator
temperature thermistor (TH5)
Vane motor (MV)
Measure the resistance between the terminals with a tester.
(At the ambient temperature 68 to 86°F)
White
M
Orange
Red
Yellow
Blue
1 Check if the drain float switch works properly.
Drain pump (DP)
2 Check if the drain pump works and drains water properly in dry mode.
1
Red
3 If no water drains, confirm that the check code P5 will be displayed 10 minutes after the
Purple
2
Black
3
Note: The DC volt drain pump motor for this model is driven by the control board, so it is not possible
Normal
Red–
Purple–Black: Abnormal (check code P5) 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
Turn the power ON while the i-see Sensor connector is connected to the CN4Z on indoor
i-see Sensor *
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.
1 2 3 4
Note: The voltage between the terminals cannot be measured accurately 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 68 to 86°F)
White
M
Orange
Red
Yellow
Blue
* i-see Sensor is available with optional "i-see Sensor corner panel" (SLP-18FAEU).
OCH669A
Check method and criterion
Measure the resistance with a tester.
(Parts temperature 50 to 86°F)
Normal
4.3 to 9.6 k"
(Refer to "8-7-1. Thermistor Characteristic Graph")
Connector
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)
operation starts.
to measure resistance between the wires leading to the pump motor.
 The pump starts to rotate.
the number of rotation is not normal.
Normal
UP
Closed
DOWN
Open
Normal
Red–Yellow
Red–Blue
250 "±7% (at 77°F)
Normal
300 "±7%
(at 77°F)
Abnormal
Other than short
Other than open
Red–Orange
Red–White
26
Switch
Magnet
Moving
Part

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