How to remove the 4-way valve 
1)  Perform work of item 1 step 
5~6 and item 2.. 
2)  Extract refrigerant gas. 
3)  Remove the electrical parts 
from item 3. 
4)  Remove fixing screw of the 
coil, and remove the coil. 
5)  Detach the welded parts of 
4-way valve and pipe. 
How to remove the expansion 
valve 
1)  Perform work of item 1,2. 
2)  Remove the electrical parts 
from item 3.. 
3)  Remove the coil. 
4)  Detach the welded parts of 
expansion valves and pipes.