*1 ON for 0.2 second and OFF for 0.2 second (Blink about 25 times for 10 seconds)
(Normally, ON for 0.4 second and OFF for 0.4 second (Blink about 12 times for 10 seconds))
*2 Optional accessories refer to adaptor for wiring, auto grill and other accessories.
Replace the outdoor fan motor.
NO
YES
YES
NO
Replace the indoor unit PCB.
There is no problem with the
unit. An external factor (noise,
etc.) other than unit failure may
be the cause.
YES
Make the fuse normal.
• In case of a fuse can be
replaced, replace the fuse.
• In case of a fuse cannot be
replaced, replace PCB.
NO
YES
YES
Replace the outdoor unit PCB
(A1P).
YES
NO
After turning OFF the power supply,
correctly insert the connector of the
fan motor and then restore the power.
Check the resistance value of the
outdoor fan motor.
A
B
Is the
resistance value of the
outdoor fan motor
normal?
Does the fuse (F6U)
have continuity?
Error is displayed again?
"
U4" or "UF" is displayed?
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