SERVICE PARTS INFORMATION 5
Fan Driver PCB
Check Fan driver PCB -1
Check Fan motor
Check Fan Driver PCB -2
YES
Replace Fan driver PCB
NO
NO
Replace Fan motor
YES
PCB pattern and parts on PCB defective?
Outdoor unit fan motor defective?
NO
YES
Replace Fan driver PCB
(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?
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.
Check Fan Driver PCB -3
NO
YES
Replace Fan driver PCB
(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?
Check Fan Driver PCB -4
NO
YES
Replace Fan driver PCB
(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?
04-99
Check Fuse of DC Fan motor (5A Fuse)
YES
Replace FUSE
NO
Blown Fuse ?
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