![background image](http://html1.mh-extra.com/html/daikin/ftkn09nmvju/ftkn09nmvju_service-manual_3296451108.webp)
Check
SiUS041501E
97
Service Diagnosis
5.8
Rotation Pulse Check on the Outdoor Unit PCB
Check No.16
Make sure that the voltage of 320 + 100 V ~ 320 - 50 V is applied.
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 3 - 4 is 15 VDC.
4. Check that the rotation command voltage between the pins 2 - 4 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 1 - 4 when the fan motor is
rotated 1 turn by hand.
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).
1
2
3
4
5
6
7
320 VDC
(R20507)
S70 or S71
PCB
Actual rotation pulse input (0 ~ 15 VDC)
Rotation command voltage (0 ~ 6.5 VDC)
Control voltage 15 VDC
Summary of Contents for FTKN09NMVJU
Page 12: ...SiUS041501E 1 List of Functions Part 1 List of Functions 1 Functions 2...
Page 59: ...SiUS041501E Remote Controller 48 Part 5 Remote Controller 1 Cooling Only 49 2 Heat Pump 51...
Page 65: ...SiUS041501E Service Diagnosis 54 5 13 Power Module Check 100...
Page 132: ...Revision History Month Year Version Revised contents 03 2015 SiUS041501E First edition...