Mitsubishi Electric EHST20C-VM2C.UK Service Manual page 63

DISASSEMBLY PROCEDURE
4. How to remove the control box
(1) Remove the front panel (Refer to Procedure 1).
(2) Disconnect only the lead wires in the control box that
connect to the components in the cylinder unit.
Photo 4-2 shows the control box before the related lead
wires are disconnected.
(3) Remove the 3 screws on the bracket (L and R) and
disengage the tab on the control box bracket from the
front frame (L). (Photo 4-1)
(4) Disengage the 2 tabs on the control box bracket (R) from
the front frame (R). (Photo 4-1)
(5) Slightly lift and pull out the control box from the cylinder
unit while tilting the control box backward.
<When swinging the control box to the front>
(2) Remove the 3 screws on the bracket (L and R). (Photo 4-1)
(3) Disengage the tab on the control box bracket (L) from
the front frame (L) and pull the control box by lifting the
left-hand side to swing the control box. (Photo 4-3)
Note: Disconnect the field wiring as necessary.
Photo 4-2
Earth cable of
water pump
(primary circuit)
CNP1
connector
CNP4
connector
CNV1
connector
CN1A connector
* The photos shown are of the EHST20C-VM6C model
with optional immersion heater.
OCH570
Earth cable of
water pump
CNPWM connector
(sanitary circuit)
Photo 4-1
Screw
Tab
Bracket (L)
Cable
strap
Front
frame (L)
* The photos shown are of the EHST20C-YM9C model.
Photo 4-3
63
PHOTOS
Cable
Bracket (R)
clamps
Control Cable
Fastener
box strap
Control box
Swing
Screw
Tab
Tab
Screw
Front
frame (R)