2019 Premium Concept Elite Service Manual
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3
、
Loosen five screws (ST4*15) from the rear cover
of the cabinet; Loosen two screws (ST4*15) from the
bottom of the cabinet
4
、
Take out the internal cabinet and power board
；
5
、
Take out the metal tube in the air tube with a
screwdriver
5
、
Remove screws from the PE pipe of checking valve
7
、
Take out the check valve, remove the metal tube in
the other end.
8
、
Assemble the new check valve into the control box in
reverse order
4.12
How to replace Rotation Knob (B9301267)
1
、
T
urn the rotation knob to “OFF” position, open and
remove the top cover by hand(as shown in photo)
2
、
Loosen the fixed screw to remove the rotation knob
