The Air Deflector Cannot Be Moved; Operation Completely Stops Within A Few Seconds Minutes After Starting - Hitachi RAS-25CNH1 Service Manual

6. The air deflector cannot be moved(other functions are normal)
Are pulse signals output at pins
of micro computer when the "auto
51
air deflection" is set to ON in the fan
operation mode?
YES
Is a voltage of 15V or more generat-
and G (12V line) of
ed between
REG2?
7. Operation completely stops within a few seconds minutes after starting. (All displays also go off.)
Operate in FAN mode with HI fan speed.
Operation lamp lights once, then goes off 5 or 10 seconds later
Remove CN10 and operate in the FAN mode gain.
Operation lamp lights once, then goes off 5 or 10 second after.
Is it possible to turn indoor fan by hand easily? (turn power switch off
before checking.)
Replace indoor fan.
NO
-
48
YES
Replace REG1.
NO
Perform a final check of operation.
YES
NO
YES
YES
NO
– 101 –
Replace the micro computer.
Check IC501 and if there is no abnor-
mality, replace the auto sweep motor.
Check if pattern of P.W.B. is not short-circuit-
Check if indoor fan is touching the chassis,
etc. If it is, correct it.