Hitachi RPC-4.0FSN2E - Removal of the Electronic Expansion Valve Coil

10 Servicing
340
SMGB0077 rev.0 - 01/2013
10.4.10 Removal of the electronic expansion valve coil
Secure the body of the valve using an appropriate wrench and
loosen the nut with another wrench, turning it anti-clockwise.
N O T E
Do not hold onto the motor when loosening the nut with a
wrench. The base of the transmission part could become
loose and break.
Remove the optional air panel in line with the instructions given in
chapter Removal of the optional air panel.
Remove the fan duct and the fan as indicated in chapter Removal of the fan duct and the fan.
Remove the drain pan as indicated in chapter Removal of the drain pan.
Loosen the nut several turns to release the transmission part from the bolt.
Prepare the new transmission part (spare part) with the position of the transmission wheel (transmission bolt) already
adjusted.
N O T E
• Pay attention to removal while replacing and prevent dust and foreign particles, etc. from entering it (the
exposed part during removal is the mechanical part of the valve).
• Do not damage the valve joint with tools.
Fit the transmission part to the body of the valve, hold onto both and make sure their axes coincide before tting the nut
to the valve body bolt.
Tighten the nut by hand and apply the torque value: 12 Nm - 15 Nm.
N O T E
• Do not apply signicant force to the motor, such as
rotational torque or bending load, while holding it with
your hand and tightening the nut.
• Thedirectionoftheeccentricpartofthemotoristtedin
the same way as the expansion valve. Although the motor
is facing away from the piping connections on the valve
body, modication of this direction does not affect the
valve open/close function. Therefore, it is not necessary
to adjust the direction of the motor if the motor position
moves in the direction of rotation after replacement, as
showninthegure.
• However, check that the motor direction for the electronic
expansion valve coil does not touch another pipe or the
side plate of the electrical box.
Once replaced, t the electronic expansion valve in the reverse
manner as indicated for the removal process.
Position the butyl sheet, attaching it correctly to the valve.
N O T E
Check that the cables do not touch the fan duct after installation is complete.