Mitsubishi Electric EHSD-MED Service Manual page 63

DISASSEMBLY PROCEDURE
5. How to remove water pump/ pump valve
<Water pump>
Close the pump valve (OFF) before removing the water pump,
and open the valves (ON) after reinstalling the water pump.
(1) Remove the front panel. (Refer to Procedure 1.)
(2) Disconnect the CNP1 connector, the earth cable, and the
CNPWM connector on the controller board. (Photo 5-1)
(3) <E*SC/D series>
Release the water pump lead wire from the fastener, the
2 cable clamps and the 2 cable straps. Feed the lead
wire out the control box without putting strain on the
CNP1 and the CNPWM connectors. (Photo 5-1)
<E*SE series and E*PX series>
Release the water pump lead wire from the fastener, the
2 cable clamps and the cable strap. Feed the lead wire
out the control box without putting strain on the CNP1
and the CNPWM connectors. (Photo 5-1)
(4) Swing the control box to the front. (Refer to Procedure 4.)
(5) <E*SC/D series>
Close (OFF) the pump valve and remove the G1" nuts using
2 spanners: one to hold the G1" nut and the other to turn the
other side of G1" nut.
Remove the water pump by sliding it horizontally. (Photo 5-2)
• When the pump valve handle is stiff, turn the handle 90
degrees clockwise mainly by using a spanner.
• When reinstalling the G1" nuts, use new G1" gaskets.
(Photo 5-3)
• Set the water pump in the way that the die stamped
arrow facing down, and the lead wire connectors facing
to the left. (Photo 5-2)
• Be sure to change the pump and the water pump lead
wire together.
• Be sure to wipe water around the surface of the pump
and the water pump lead wire thoroughly.
Photo 5-3 E*SC/D and E*PX series)
(
OCH712C
Gasket G1"
63
PHOTOS/ FIGURES
Photo 5-1
Water pump
connector (CNP1)
Earth cable
Lead
wire
Cable
clamps
Fastener
Cable straps
Photo 5-2 E*SC/D series)
(
Gasket (G1")
Nut (G1")
Lead wire
connectors
Water pump
Nut (G1")
Gasket (G1")
Pump valve
Pump valve
stay
Photo 5-4 E*SC/D and E*PX series)
(
Screws
CNPWM
connector
Lead
wire
Flow direction
Quick
Screws
connection
O-ring
Pump valve
stay