Solenoid Valve - Daikin LXE10E-A Service Manual

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4.2.7 Solenoid valve

Two kinds of solenoid valves are employed for
the unit.
Coil is common and replacement procedure is
also almost the same for all types of valves.
Valve name Symbol
Economizer
ESV
Solenoid valve.
Injection Solenoid
ISV
valve.
Liquid Solenoid
LSV
valve.
Discharge gas
by-pass Solenoid BSV
valve.
Defrosting Solenoid
DSV
valve.
Hot gas Solenoid
HSV
valve.
Reheat Solenoid
RSV
valve.
VPV-803DQ
Fig. 1
NEV-202DXF
Fig. 2
Valve type Type of coil
NEV-202DXF
NEV-
MOAB507C
VPV-803DQ
(1) Replacing the coil
q Remove the lead wire connector from the inside
of the control box, and cut and recover the binding
band which fastens the lead wire.
w Remove the hexagonal head bolt on the top of the
coil to pull the coil out.
e Replace the coil with a new one and restore the
hexagonal head bolt, the binding band and
connector on the original position.
When reassembling the coil, the tightening torque
should be 1.2 N m (12.2 kg cm).
(2) Replacement of valve body
q Remove the hexagonal head bolt on the top of the
coil to pull the coil out.
w Remove the hexagonal head bolt of the fixing
plate, and cut the two pipes at the side of the
valve body.
Disconnect the remaining pipes at the brazed joint
sections.
e Insert the new valve body into the pipe and
conduct brazing while keeping the temperature of
the valve body below 120 ˚C (248 ˚F) by cooling.
r Install the coil and restore the hexagonal head bolt
of the fixing plate and the connector into their
original position.
q Lead wire
r Valve body
t Hexagon head
bolt for fixing plate
4-18
w Hexagon
head bolt
e Coil
q Hexagon
head bolt
w Coil
e Valve body
r Fixing plate