Daikin FTX-N Series Service Manual page 188

Check
Check No.02
FTX18/24UVJU, 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).
FDMQ Series
1. Turn the power supply OFF.
2. With the fan motor connector disconnected, measure the resistance between each pin, then
Measuring points
183
S1
7
6
5
4
3
2
1
make sure that the resistance is more than the value mentioned in the following table.
Judgement
White - Blue 1 MΩ or more
Orange - Blue 100 kΩ or more
Brown - Blue 100 Ω or more
Red - Blue 100 kΩ or more
Motor power supply voltage (310 ~ 340 VDC)
Unused
Unused
GND
Motor control voltage (15 VDC)
Rotation command voltage (1~ 6.5 VDC)
Rotation pulse input
X8A
White FG
Orange Vsp
Brown Vcc
Blue GND
— —
— —
Red Vdc/Vm
(R25080)
SiUS091601EA
R6000681
Part 6 Service Diagnosis