Mitsubishi Electric EHST20C-VM6HA Service Manual page 60

DISASSEMBLY PROCEDURE
6. How to remove the 3-WAY VALVE / 3-WAY VALVE MOTOR
(1) Remove the front panel. (Refer to Procedure 1.)
(2) Remove the control box. (Refer to Procedure 4.)
(3) Remove the 3-way valve motor from the 3-way valve
while pressing the button on the back of the motor (viewed
from the front of the cylinder unit). (Photo 6-2)
w Press the button also when reinstalling the 3-way valve
motor.
(4) Remove the 3-way valve by removing the three 1" nuts
in the order of the bottom, middle and top using two
spanners: one to hold the 3-way valve and the other to
turn each nut. (Photo 6-2)
w When reinstalling the 1" nuts, use new 1" gaskets.
A and B shown represent the bottom and the top
directions of the 3-way valve, respectively.
Note:
Before replacing the motor, be sure to power off the
cylinder unit.
Failure to do so may cause electric shock or cause the
3-way valve to malfunction.
PHOTOS
Photo 6-1
3-way valve motor 3-way valve
Photo 6-2
3-way valve
motor
Place to hold the 3-way valve with a spanner
60
B
Nut (1")
Gasket(1")
Nut (1")
Gasket(1")
Gasket(1")
Nut (1")
A
Button
3-way valve