Hitachi RAF-25RPA Service Manual page 71

< Reference >
When operation stop with LD301 blinks 12 times, it may be caused by faulty DC fan motor.
In this case, please check CN24 connection first. It makes Fan Motor Lock a lso if those connectors
are in misconnection.
DC Fan Motor has broken invites 2A Fuse burned. Please replace both DC Fan Motor and 2A Fuse
together.
It will makes "Fan Lock Stop" when something has disturb the Fan rotation by inserting materials into
propeller fan or ice has growing inside of outdoor unit by snowing.
It may make "Fan Lock Stop" by strong wind (ex. 17m/sec. or above) against the Fan rotation. In this
case unit will be restart again after a while.
In case of " Fan Lock Stop" even though the DC Fan Motor is rotating correctly, the possible cause in
Fan Motor problem or control board problem. Stop after the Fan motor runs 2 minutes, Fan Motor
may be broken.
< Caution >
Please take care for the electrical shock by high voltage of DC Fan Motor power source which is
common with compressor when you are servicing this unit.
You can not confirm the coil and wiring of Motor directly due to the built in control circuit in Fan Motor.
71