Hitachi RAS-E10H2 - Page 80

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 3 and 6 on the main P.
W.B., and between +15V
and 15-0V (silk-screened) on
the main P.W.B.
Is the fan operating?
(An error occurs after the fan operates for 2 minutes.) Is the voltage between 4 and 6 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 4 and 7 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.
Yes
No
No
No
Ye
s
No
No
No
No
No
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
※
LD 301 blinks 10 times. Defective power supply voltage
Is AC220-230V being output at terminals A and B on the terminal board?
Apply AC220-230V.
Check the interior wiring.
TAB05, TAB11, reactor,
and C023 (yellow green) connected properly?
Connect properly.
Replace the main P.W.B. Possible causes include:
Power relay malfunction
Defective microcomputer
terminal
Yes
Ye
s
Ye
s
No
No
No
※
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