Fan Driver Pcb - Fujitsu Airstage VR-II Series Service Manual

SERVICE PARTS INFORMATION 5

Fan Driver PCB

Check Fan motor
Outdoor unit fan motor defective?
NO
Check Fuse of DC Fan motor (5A Fuse)
Blown Fuse ?
NO
Check Fan driver PCB -1
PCB pattern and parts on PCB defective?
NO
Check Fan Driver PCB -2
(1) Disconnect the wires of the capacitor connected
to the connector of the Fan driver PCB.
(2) Is there a short between pins 1-2 of
the Fan driver PCB side CN703 connector?
NO
Check Fan Driver PCB -3
(3) Disconnect the wires of the Fan motor connected
to the connector of the Fan driver PCB.
(4) Is there a short between pins 4-5 of
the Fan driver PCB side CN702 connector?
NO
Check Fan Driver PCB -4
(5) Disconnect the wires of the Main PCB connected
to the connector of the Fan driver PCB.
(6) Is there a short between pins 1-2 of
the Fan driver PCB side CN705 connector?
NO
Turn on the power.
(7) Reconnect all the connection wires disconnected up to (1)-(6) to their original places.
(8) Turn on the AC power.
If the LED of the Main PCB shows Fan error, replaces the Fan driver PCB.
YES
Replace Fan motor
YES
Replace FUSE
YES
Replace Fan driver PCB
YES
Replace Fan driver PCB
YES
Replace Fan driver PCB
YES
Replace Fan driver PCB
04-99