Fan Motor Connector Output Check - Daikin FTXM-K Series Service Manual

SiBE041434E
5.2

Fan Motor Connector Output Check

Check No.02 35/42/50 class
1. Check the connection of connector.
2. Check the motor power supply voltage output (pins 4 - 7).
3. Check the motor control voltage (pins 4 - 3).
4. Check the rotation command voltage (pins 4 - 2).
5. Check the rotation pulse (pins 4 - 1).
Check No.03 20/25 class
1. Check the connector for connection.
2. Turn the power off.
3. Check if each resistance at the phases U - V and V - W is 90
1. Check the connector for connection.
2. Check the motor control voltage is generated (between the pins 2 - 3).
1. Check the connector for connection.
2. Turn the power on and stop the operation.
3. Check if the Hall IC generates the rotation pulse 4 times when the fan motor is manually
Service Diagnosis
S1
7
6
5
4
3
2
1
Fan motor wire breakdown / short circuit check
12 - 9, and between 9 - 6).
Motor control voltage check
Rotation pulse check
rotated once (between the pins 1 - 3).
S200
12
11
10
9
8
7
6
5
4
3
2
1
Motor power supply voltage (310 ~ 340 VDC)
Unused
Unused
GND
Motor control voltage (15 VDC)
Rotation command voltage (1~ 6.5 VDC)
Rotation pulse input
Phase U
Free pin
Free pin
Phase V
Free pin
Free pin
Phase W
Free pin
Free pin
GND
Motor control voltage (15 VDC)
Rotation pulse (5 VDC)
Check
(R19654)
Ω Ω
~ 100 (between the pins
(R11979)
98