LD301 blinks 12 times.
Fan lock error.
Is CN24 connected?
Is the propeller fan
locked?
Have the 1A fuse and
R107 blown?
• Is 15V being generated?
* Check voltage both between
CN18
ĺ and
Ļ on the control
P.
W.B., and between “+15V”
and “15-0V” (silk-screened) on
the power P.W.B.
If no output voltage is present
on the power P.W.B. side,
replace the power P.W.B.
Is the fan operating?
(An error occurs after the
fan operates for 2 minutes.)
Is the voltage between
ĺ
and
ļ
at CN24 normal?
(Normally, the voltage is
above approx. DC1.7V.)
Connect the connector.
Remove any
obstructions.
Replace the fan motor
and main P.W.B.
Is the voltage between ĺ and
Ľ at CN24 normal?
Check to see if the voltage is
within 2.5V
±0.5V using a
tester.
(In effect, the output voltage
is alternately switched
between 5V and 0V.)
Replace the main
P. W . B .
Replace the fan motor.
Ye s
No
No
No
Ye s
No
No
No
No
No
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
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