SERVICE PARTS INFORMATION 5
Check Point 1 : Check rotation of fan
Outdoor unit fan motor
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.
(Vm: DC voltage, GND: Ground terminal)
>>If they are short-circuited (below 300 k ), replace Outdoor fan motor and Main PCB.
Pin number
(wire color)
Terminal function
(symbol)
1 (Red)
2
3
4 (Black)
5 (White)
6 (Yellow)
7 (Blue)
DC voltage (Vm)
No function
No function
Ground terminal (GND)
Control voltage (Vcc)
Speed command (Vsp)
Feed back (FG)
SERVICE PARTS INFORMATION 4
Check Point 1 : Check rotation of fan
Indoor unit fan motor
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.
(Vm: DC voltage, GND: Ground terminal)
>>If they are short-circuited (below 300 k ), replace Indoor fan motor and Controller PCB.
02-33
Pin number
(wire color)
Terminal function
(symbol)
1 (Brown)
2 (Yellow)
3 (White)
4 (Black)
5
6 (Red)
Feed back (FG)
Speed command (Vsp)
Control voltage (Vcc)
Ground terminal (GND)
No function
DC voltage (Vm)
AMP Air Conditioning
www.ampair.co.uk | [email protected]
