Daikin FTXS60GV1B - Fan Motor Connector Output Check; Power Supply Waveforms Check

SiBE041011_A Check
Service Diagnosis 103
5.2 Fan Motor Connector Output Check
Check No.02 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 Power Supply Waveforms Check
Check No.11 Measure the power supply waveform between No. 1 and No. 2 on the terminal board, and check
the waveform disturbance.

Check to see if the power supply waveform is a sine wave. (Fig.1)

Check to see if there is waveform disturbance near the zero cross. (sections circled in Fig.2)
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
Fig.1 Fig.2
(R1736)
(R1444)