¢ Models: AGHG09KVCA, AGHG12KVCA, and AGHG14KVCA
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 indoor 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 indoor fan motor and controller PCB.
Upper fan motor
Pin number
(wire color)
Terminal function
(symbol)
1 (Blue) Revolution pulse (PG)
2 (Yellow) Speed command (Vsp)
3 (White) Control voltage (Vcc)
4 (Black) Earth terminal (GND)
5 No function
6 (Red) DC voltage (Vm)
Lower fan motor
Pin number
(wire color)
Terminal function
(symbol)
1 (Blue) Revolution pulse (PG)
2 (Yellow) Speed command (Vsp)
3 (White) Control voltage (Vcc)
4 (Black) Earth terminal (GND)
5 No function
6 No function
7 (Red) DC voltage (Vm)
5-4. Indoor unit fan motor - (03-87) - 5. Service parts information
TROUBLESHOOTING
TROUBLESHOOTING
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