Check SiBE121135_A
231 Service Diagnosis
8.2 Fan Motor Connector Check
Check No.02 FTXG, FTXS35/42/50K, FTXS-J, FTXS-G, ATXS, FVXG, FVXS Series
1. Check the connection of connector.
2. Check motor power supply voltage output (pins 4 - 7).
3. Check motor control voltage (pins 4 - 3).
4. Check rotation command voltage output (pins 4 - 2).
5. Check rotation pulse input (pins 4 - 1).
Check No.03 CTXS, FTXS20/25K Series
 Fan motor wire breakdown / short circuit check
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
Ω ~ 100 Ω (between the pins
12 - 9, and between 9 - 6).
 Motor control voltage check
1. Check the connector for connection.
2. Check the motor control voltage is generated (between the pins 2 - 3).
 Rotation pulse check
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
rotated once (between the pins 1 - 3).
7
6
5
4
3
2
1
S1 or S200
(R14225)
Motor power supply voltage (310 ~ 340 VDC)
Unused
Unused
GND
Motor control voltage (15 VDC)
Rotation command voltage (1~ 5 VDC)
Rotation pulse input
(R11979)
12
11
10
9
8
7
6
5
4
3
2
1
Phase U
Free pin
Free pin
Free pin
Free pin
Free pin
Free pin
Phase V
Phase W
GND
Motor control voltage (15 VDC)
Rotation pulse (5 VDC)
S200
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