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3. Indoor fan speed does not change (others are normal)
Can the fan be stopped by
remote control?
The microcomputer fan PWM
output (pin) is "Hi".
Replace the microcomputer.
Replace the microcomputer.
Replace the microcomputer.
Replace the indoor fan motor.
Check to see if shorting, etc.
has occurred in the P.W.B.
pattern.
Check to see if the indoor fan is
touching the chassis, etc.
If it does, repair.
No
No
Perform final operation check.
4. Air deflector does not move (others are normal)
5. All systems stop from several seconds minutes to several after operation is started
(all indicators are also off)
Are pulse signals output at
microcomputer pins - when
auto swing is turned on in the
fan mode?
Is a voltage over 15V or below
10V being generated on the 12V
line?
Replace IC111.
Check IC712. If it is normal,
replace the air deflector motor.
No
No
Perform final operation check.
Set to the "Hi" fan mode.
Yes
The operation lamp lights once and goes out in 5-10 seconds.
The operation lamp lights once and goes out in 5-10 seconds.
Can the indoor fan be lightly turned by hand?
(Set the power switch to " off " to check.)
Yes
Disconnect CN10 and set to the fan mode again.
Yes
No
No
Yes
Replace the indoor fan motor.
Yes