How To Remove The Flow Switch - Mitsubishi Electric EHST20C-VM6HB Service Manual

DISASSEMBLY PROCEDURE

7. How to remove the flow switch

(1) Remove the front panel. (Refer to Procedure 1.)
(2) Remove the control box cover. (Refer to Procedure 3.)
(3) Disconnect the CN2F connector on the controller board.
(Photo 4-1)
(4) Release the lead wire from the 5 bands and 2 cable
straps. (Photos 10-1, 10-)
(5) Close (OFF) the strainer valve handle (under).
(Photo 10-)
w When the valve handle is stiff, remove the handle and
turn the vertical stem 90 degree mainly by using a span-
ner. (Photo 5-)
(6) Remove the flow switch by loosening the nut. (Photo 7-1)
w When reinstalling the flow switch, use a new O-ring.
(Photo 7-)
Note: To ensure the correct functioning of the flow switch,
check the following when installing it:
▪ The flow switch paddle is set perpendicularly to the
water flow. (Photo 7-2)
▪ The lead wire of the flow switch points toward the left-
hand. (Photo 7-1)
▪ The lead wire runs parallel to the water pipe.
(Figure 7-1)
Figure 7-1
Flow
Lead wire
Flow
Flow
OCH531
Flow switch
Pipe
OK
Flow switch
Pipe
NG
Flow switch
Pipe
NG
PHOTOS
Photo 7-1
Lead wire
Photo 7-2
O-Ring
74
Flow switch
Nut
Flow direction
Flow switch paddle