Removal Of The Four-Way Valve And Defrost Solenoid Valve Procedure - Daikin SUPER MULTI NX G Series Service Manual

Outdoor Unit – 2MXS18GVJU
1.7 Removal of the Four-Way Valve and Defrost Solenoid
Valve Procedure
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Step
1 Remove the screw of the
four-way valve coil to
remove the coil.
2 Remove the screw and
remove the defrost
solenoid valve coil.
 Before working, make sure
that the refrigerant gas is
empty in the circuit.
 Be sure to apply nitrogen
replacement when heating
us up the brazed part.
3 Heat the 4 brazed points
of the four-way valve.
Disconnect point (a) first.
4 Disconnect points (b) and
(c).
Disconnect point
(d).Remove the four-way
5 valve.
175
Procedure
Four way
valve coil
Defrost solenoid
valve coil
Points
Warning
1. Be careful to not burn
yourself with pipes and
other parts that are heated
by the gas brazing machine.
2. If the refrigerant gas leaks
during work, ventilate the
room. If the refrigerant gas
is exposed to flames, toxic
gas may be generated.
(R10370)
Caution
1. To consider global
environmental protection,
do not discharge the
refrigerant gas into the
atmosphere. Make sure to
collect all refrigerant gas.
Cautions for Restoration:
1. Restore the piping with non-
oxidation brazing.
2. It is required to prevent the
carbonization of oil inside the
four-way valve and the
deterioration of the gaskets
affected by the heat (keep
below 120°C/248°F).Wrap the
four-way valve with a wet
cloth and provide water to
prevent the cloth from drying
out.
 In pulling the pipes, be careful
not to over-tighten them with
pliers to avoid deformation.
In case of difficulty with the
gas brazing machine:
1. Disconnect the brazed part
where it is easy to disconnect
and restore.
2. Cut pipes on the main unit
with a tube cutter in order to
make it easy to disconnect.
SiUS12-928
Removal Procedure