Daikin FTKS20D3VMW, Service Manual, Page: 296 / 355

SiENBE12-713 Check
Service Diagnosis 285
6.1.15 Hall IC Check
Check No.16 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.
Failure of (1)
&
faulty PCB
&
Replace the PCB.
Failure of (2)
&
faulty Hall IC
&
Replace the fan motor.
Both (1) and (2) result
&
Replace the PCB.
The connector has 3 pins, and there are two patterns of lead wire colors.
Gray (power supply)
Purple (power signals)
Blue (grounding)
White (power supply)
White with black line (signals)
White with manufacturer mark (grounding)