Fujitsu ASY50-KM Service Manual

5-5. Outdoor unit fan motor
¢ Models: AOYG18KBTA3 and AOYG24KBTA3
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 (Red) DC voltage (Vm)
2 No function
3 No function
4 (Black) Ground terminal (GND)
5 (White) Control voltage (Vcc)
6 (Yellow) Speed command (Vsp)
7 (Blue) Feed back (FG)
5-5. Outdoor unit fan motor - (03-99) - 5. Service parts information
TROUBLESHOOTING TROUBLESHOOTING

Fujitsu ASY50-KM Specifications

General

Brand	Fujitsu
Model	ASY50-KM
Category	Air Conditioner
Language	English