Electronic Expansion Valve - Daikin LXE10E-A14 Service Manual

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4.1.6 Electronic expansion valve

G Model Coil : EBM-MD12DM-1
Body : EDM-B804DM-1
This unit adopts an electronic expansion valve.
The electronic expansion valve controls the
optimum refrigerant flow rate automatically,
using the temperature sensor at the evaporator
inlet and outlet pipes.
In case of emergency including controller
malfunctions, refer to the chapter of
troubleshooting, section 6.5, Emergency
operation.
(1) Replacing the coil
q Cut the binding bands which fasten the water-
proof tube and the lead wires.
w Disconnect the lead wire connector from the
water-proof tube.
e Loosen the lock nut, then remove the coil
from the body.
r Install a new coil. The tightening torque for
installation is 6.9 to 16.7 N m (70 to 170kgf
cm).
t Restore the binding bands and the lead wire
connector into the original state.
y After replacing, carry out refrigerant leakage
check, and make sure that there are no leaks.
Water-proof tube
Connector
Binding bands
(2) Replacing the body
q Loosen the lock nut, then remove the coil.
w Remove the hexagonal head bolts, and cut
the pipe on the body, then remove remaining
pipes from brazing parts.
e Connect a new body to the pipes. Be sure to
conduct brazing work while cooling the body
below 120˚C (248˚F) by using wet cloths.
r Fix the body to the mounting base.
t Remove the cap, and mount the coil with the
tightening torque of 6.9 to 16.7 N m (70 to
170kgf cm).
y After replacing, carry out refrigerant leakage
check, and make sure that there are no leaks.
u Apply a silicon sealant to the lock nut section.
e Mounting base
q Coil
w Lock nut
e Body
4-5
q Coil
w Lock nut
y Cap
t Body
r Hexagon
head bolt