Rotation Pulse Check On The Outdoor Unit Pcb - Daikin FTXR-T Series Service Manual

SiUS041829E
 Diagnose method (Diagnose according to 6 LEDs lighting status of the inverter analyzer.)
1. If all the LEDs are lit uniformly, the compressor is defective.
2. If the LEDs are not lit uniformly, check the power module.
3. If NG in Check No.22, the power module is defective.
4. If any solder cracking is found, replace the PCB or repair the soldered section.
Caution
1. When the output frequency is low, the LEDs blink slowly. As the output frequency increases, the
2. On completion of the inverter analyzer diagnosis, be sure to re-crimp the FASTON terminals.
5.8

Rotation Pulse Check on the Outdoor Unit PCB

Check No.16
Make sure that the voltage is within 320
1. Set operation off and power off. Disconnect the connector S70 or S71.
2. Check that the voltage between the pins 4 - 7 is 320 VDC.
3. Check that the control voltage between the pins 4 - 3 is 15 VDC.
4. Check that the rotation command voltage between the pins 4 - 2 is 0 ~ 6.5 VDC.
5. Keep operation off and power off. Connect the connector S70 or S71.
6. Check whether 4 rotation pulses (0 ~ 15 VDC) are input at the pins 4 - 1 when the fan motor is
When the fuse is melted, check the outdoor fan motor for proper function.
If NG in step 2  Defective PCB  Replace the outdoor unit PCB (main PCB).
If NG in step 4  Defective Hall IC  Replace the outdoor fan motor.
If OK in both steps 2 and 4  Replace the outdoor unit PCB (main PCB).
Part 6 Service Diagnosis
Replace the compressor.
Refer to Check No.22.
Replace the main PCB. The power module is united with the main PCB.
If OK in Check No.22, check if there is any solder cracking on the PCB.
If there is no solder cracking, replace the PCB.
LEDs blink quicker. The LEDs look like they are lit.
Otherwise, the terminals may be burned due to loosening.
rotated 1 turn by hand.
PCB
S70 or S71
1
2
3
4
5
6
7
Direction of crimp
FASTON terminal
VDC.
+ 100
- 50
Actual rotation pulse input (0 ~ 15 VDC)
Rotation command voltage (0 ~ 6.5 VDC)
Control voltage 15 VDC
320 VDC
Check
This size is shortened
by the crimp.
(R15292)
(R20507)
117