York CIDH018B21S, Service Manual

Page: 98 / 186

(Ducted Medium Static Type)
MAINTENANCE
4-24
SM-18001-rev.1
4.2.2.5 Removing Electronic Expansion Valve Coil
(1) Remove the service cover according to Section 4.2.2.4 “Removing Thermistors for Liquid Pipe and
Gas Pipe”.
(2) Remove the detents of the expansion valve coil from the projection parts of the valve body by rotating
the valve coil. Pull up the valve coil and remove it. At this time, take care not to twist the pipes.
(3) Insert the new expansion valve coil into the expansion valve body. When inserting the valve coil,
secure the projection parts into the detents.
NOTE:
The detents are located 90
o
apart in a circle and the projections are located 180
o
apart in a circle.
Make sure to fit the projection parts into the detents. The position of rotation direction does not affect
the operation. If the valve coil is inserted incorrectly, it may cause malfunction of the valve coil.
(4) When the replacement is completed, secure the wire for the expansion valve coil near the valve coil
with a plastic band. At this time, secure the edge of lead
wires for the expansion valve coil to
face down.
4.2.2.6 Removing Float Switch
(1) Remove the service cover according to Section 4.2.2.4 “Removing Thermistors for Liquid Pipe and
Gas Pipe”.
(2) The float switch is secured on the heat exchanger mounting plate.
Remove the float switch using two wrenches.
Phillips Screwdriver, Wrenches Tool
Float Switch
ATTENTION:
When reassembling, handle the float switch carefully.
(Tightening Torque: Approx. 0.2lbf
●
ft (0.3N
●
m))
If the float switch is dropped, malfunction will occur.
Phillips Screwdriver Tool
Projection
Detent
Expansion Valve Body
Expansion Valve Coil
TURN OFF all POWER supply switches.