Check
SiUS091133
143
Service Diagnosis
5.2
Fan Motor Connector Output Check
Check No.02
FTXS series
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).
5.3
Hall IC Check
Check No.04
FDXS series
1. Check the connector connection.
2. With the power on, operation off, and the connector connected, check the following.
Output voltage of about 5 V between pins 1 and 3.
Generation of 3 pulses between pins 2 and 3 when the fan motor is operating.
If NG in step 1
Defective PCB
Replace the PCB.
If NG in step 2
Defective Hall IC
Replace the fan motor.
If OK in both steps 1 and 2
Replace the PCB.
7
6
5
4
3
2
1
S1
(R12404)
Motor power supply voltage (310 ~ 340 VDC)
Unused
Unused
GND
Motor control voltage (15 VDC)
Rotation command voltage (1~ 5 VDC)
Rotation pulse input
1
Gray (power supply)
Purple (signals)
Blue (grounding)
2
3
(R14211)
S7