Mitsubishi Electric SLZ Series Technical & Service Manual page 24

8-7. TROUBLESHOOTING OF MAIN PARTS
SLZ-KF09NA1 SLZ-KF12NA1 SLZ-KF15NA1 SLZ-KF18NA1
Parts name
Room temperature
thermistor (TH1)
Pipe temperature
thermistor/liquid (TH2)
Condenser/evaporator
temperature thermistor (TH5)
Vane motor (MV)
White
M
Orange
Red
Blue Yellow
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
Yellow
Blue
* i-see Sensor is available with optional "i-see Sensor corner panel" (SLP-18FAEU).
TCH118
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")
Measure the resistance between the terminals with a tester.
(At the ambient temperature 68 to 86°F)
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)
1 Check if the drain float switch works properly.
2 Check if the drain pump works and drains water properly in drying mode.
2 Check if the drain pump works and drains water properly in dry mode.
3 If no water drains, confirm that the check code P5 will be displayed 10 minutes after the
operation starts.
Note: The DC volt drain pump motor for this model is driven by the control board, so it is not possible
to measure resistance between the wires leading to the pump motor.
Normal
Red–Black: Input 13 V DC → The pump 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.
Measure the resistance between the terminals with a tester.
State of moving part Normal
UP Closed
DOWN Open
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.
Measure the resistance between the terminals with a tester.
(At the ambient temperature 68 to 86°F)
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
24
Switch
Magnet
Moving
Part