Indoor Fan Motor Connector Check; Power Supply Waveform Check - Daikin FTXR-T Series Service Manual

SiUS041829E
5.2

Indoor Fan Motor Connector Check

Check No.02
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).
5.3

Power Supply Waveform Check

Check No.11
Measure the power supply waveform between No. 1 and No. 2 on the terminal strip, and check the
waveform disturbance.
 Check if the power supply waveform is a sine wave (Fig.1).
 Check if there is waveform disturbance near the zero-cross (sections circled in Fig.2).
[Fig.1]
Part 6 Service Diagnosis
S200
Motor power supply voltage (310 ~ 340 VDC)
7
Unused
6
Unused
5
GND
4
Motor control voltage (15 VDC)
3
Rotation command voltage (1~ 5 VDC)
2
Rotation pulse input
1
[Fig.2]
(R1736)
Check
(R1444)
113