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4-5. Outdoor unit fan motor

¢ Models: AOYG18KBTB, AOYG22KBTB, AOYG24KBTB,

AOYG30KBTB, AOYG36KBTB, and AOYG45KBTB

Check point 1. Check rotation of fan

Rotate the fan by hand when operation is off.

(Check if fan is caught, dropped off or locked motor)

→ If fan or bearing is abnormal, replace it.

Check point 2. Check resistance of outdoor fan motor

Refer to below. Circuit-test “Vm” and “GND” terminal

NOTE: Vm: DC voltage, GND: Earth terminal

→ If they are short-circuited (below 300 kΩ), replace outdoor fan motor and controller PCB.

Pin number

(wire color)

Terminal function

(symbol)

1 DC voltage

4 Earth terminal

1 (Red) DC voltage (Vm)

2 No function

3 No function

4 (Black) Earth terminal (GND)

5 (White) Control voltage (Vcc)

6 (Yellow) Speed command (Vsp)

7 (Brown) Feed back (FG)

4-5. Outdoor unit fan motor - (03-56) - 4. Service parts information

TROUBLESHOOTING

Fujitsu AOYG22KBTB User Manual

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