Hitachi RAF-25NH4 Données Techniques page 231

Discharge frame
7. DAMPER MOTOR-DAMPER LIMIT SWITCH
(1) Remove the securing screw of the damper limit switch.
(2) Remove the two securing screws of the damper motor (stepping motor).
(3) Pull out the damper motor and the damper limit switch, and then remove them.
TT CHING
Note: After removing the damper limit switch, check to see that the switch operates when the damper goes upwards.
8. NEGATIVE ION GENERATING DEVICE
(1) Remove the front panel, and then remove the front cover.
(2) Remove the display P.W.B..
(3) Remove the cord from the stepping motor of the air deflector.
(4) Remove the top frame.
(5) Use a flat-blade screwdriver to slightly lift the high voltage generating device, and then pull it towards you.
(6) Remove the securing screw, and remove the negative ion generating device.
Negative ion generating device securing screw
Fan motor support
Securing screw of electrical parts case
Damper limit switch
Cabinet
Section B
Damper motor
Negative ion generating device
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Discharge frame
High voltage generating device
Fan motor
Electrical parts case