Removal Of Four-Way Valve, Solenoid Valve And Shunt - Daikin CTXS09GVJU Service Manual

SiUS12-814
1.7

Removal of Four-Way Valve, Solenoid Valve and Shunt

Procedure
Step
1 Remove 1 screw of the
four-way valve coil.
2 Remove 1 screw of the
solenoid valve coil.
Before taking this
procedure, make sure
there is no refrigerant gas
left in the refrigerant pipes.
3 Place welding
protective sheet or iron
plate around the
four-way valve to
prevent the flames of a
gas welding rod from
affecting the valve.
4 Heat the four brazed
points of the four-way
valve. Disconnect the
point (a) first.
5 Disconnect the points
(b) and (c).
6 Disconnect the point
(d).
Removal Procedure
Warning Be sure to wait 10 minutes or more after turning off all power supplies
before disassembling work.
Procedure
Outdoor Unit – 2MXS18GVJU
Points
Reassembling precautions
1. Use non-oxidizing brazing
method. If nitrogen gas is
not available, braze the
parts speedily.
2. Avoid deterioration of the
gaskets due to
carbonization of oil inside
the four-way valve or
thermal influence. For this
purpose, wrap the four-way
valve with wet cloth. Splash
water over the cloth against
becoming too hot (keep it
below 248°F).
In pulling the pipes, be
careful not to over-tighten
them with pliers. The pipes
may get deformed.
If the gas welding machine fails
to remove the four-way valve,
take the steps below.
1. Disconnect the brazed pipe
sections that are readily
easy to separate and join
together later.
2. With a small copper tube
cutter, cut off the internal
pipes to easily take out the
four-way valve.
Note:
Never use a hack saw. The
sawdust may come into the
circuit.
185