Hitachi RAS-18YH4 Service Manual page 94

4. Tangential air flow fan and fan motor
(1)Remove two screws locking the drain pan.
(2)Press to lower the hook at the center of the
unit a little and pull the claw forward to remove
the drain pan.
(3)Remove the screws from the upper and lower
bearing covers.
(4)Remove the locking hook of the lower bearing
cover from the Cabinet.
Lower bearing cover
Cabinet
(5)Remove two lock screws from the fan motor
holder.
(6)Pull up the evaporator by holding it at the lower
side. Insert a screwdriver through the space
between the evaporator and drain chute and
loosen the fan lock screw to remove the fan
and fan motor.
Fig. 5
Upper
bearing cover
Fig. 6
Fig. 7
〈OUTDOOR UNIT〉 MODEL RAC-18YH4
1. Electrical parts
(1)Remove the service value cover lock screws
and lower the cover to remove it.
(2)Remove the top cover lock screw and raise the
cover to remove it.
(3)Remove the front cover lock screw.
(4)Lower the right side of the front cover and pull
it forward. Then, remove the cover from the
hook.
(5)Pull the right side of the front cover a little and
pull up the left side to remove it from the hook.
(6)Remove each connector and earth cable from
the lead wire.
(7)Remove four lock screws from the main P.W.B.
and pull two support hooks at the front side to
remove the P.W.B.
(8)Pull three support hooks at the rear side of the
Power P.W.B. to remove the P.W.B.
Main
P.W.B.
Support hooks
– 97 –
Fig. 8
Fig. 9
Support hooks
Power
P.W.B.
Fig. 10