Daikin FDMR50TVMG, Руководство по обслуживанию

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Check SiSG121917E
175 Part 6 Service Diagnosis
8.8 Rotation Pulse Check on the Outdoor Unit PCB
Check No.16
Outdoor fan motor
Make sure that the voltage of 320 ± 30 V is applied.
1. Set operation off and power off. Disconnect the connector S70.
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 ~ 15 VDC.
5. Keep operation off and power off. Connect the connector S70.
6. Check whether 4 pulses (0 ~ 15 VDC) are output at the pins 4 - 1 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
(R21120)
S70
Act u al rotation p u lse inp u t (0 ~ 15 VDC)
Rotation command v oltage (0 ~ 15 VDC)
Control v oltage 15 VDC
PCB