Hitachi RAS-25WX8 Manuel De Maintenance page 152

2. Indoor fan does not operate (others are normal)
Can the fan be stopped by remote
control?
3. Air deflector does not move (others are normal)
Are pulse signals output at
microcomputer pins
Sweep 1],
19 22
2] when auto swing is turned on
in the fan mode?
Is a voltage over 15 or below 10V
being generated on the 12V line?
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Yes
The microcomputer fan PWM
output (at pin
No
No
[Auto
15 18 -
[Auto Sweep
-
Yes
Yes
No
manuals search engine
Yes
) is 1 - 5V.
40
No
Perform final operation check.
Replace IC111.
Perform final operation check.
– 151 –
Replace the microcomputer.
Replace the fan motor.
Replace the microcomputer.
Replace the microcomputer.
Check IC711. If it is normal,
replace the air deflector motor.