Daikin LX10F10A, Service Manual

Page: 109 / 126

4-20
4.8.11 Electronic Expansion Valve (EEV),
Economizer Modulation Valve (EMV),
Discharge Modulation Valve (DMV)
Name Type
Electronic Expansion Valve
EEV
Coil
HCM-MD12DM-2
Socket (Red)
Body
HCM-BD35DM-2
Valve size: 3.5mm
Economizer Modulation Valve
EMV
Coil
HCM-MD12DM-3
Socket (White)
Body
HCM-BD24DM-1
Valve size: 2.4mm
Discharge Modulation Valve
DMV
Coil HDM-MD120DM-4
Body HCM-BD120DM-2
(1) Replacing the coil
① Remove the binding band fixing the coil leadwire.
② Disconnect the connector of the coil.
③ Remove the metal fitting and the coil.
④ Replace the old coil with a new one.
⑤ Attach the coil and the metal fitting.
⑥ Mount the connector of the coil.
⑦ Fix the coil lead wire with a binding band.
(2) Replacing the body
① Remove the binding band fixing the coil leadwire.
② Detach the anti-condensation tube until the
curved part of the pipe.
③ Remove the metal fitting and the coil.
④ Remove the brazed part of the pipe.
⑤
Insert the new valve body in the pipe.
→ Braze the new valve body while cooling it with a wet cloth.
Maximum body temperature: 120
℃ (248 F) or less
⑥ Mount the coil and the metal fitting.
⑦
Mount the anti-condensation tube.
⑧ Fix the coil lead wire with a binding band.
Coil
Lead wire
Binding band
Main unit
Binding band
Anti-condensation tube
＜
Part names
＞
Metal fitting
Fixing pipe
Valve body
Coil
Metal fitting
＜ Replacement of the coil ＞
Correctly installed
＊ It clicks when installed.
Stopper
Fixing pipe
Wrongly installed
Metal fitting
＜ Confirmation of metal fitting installation ＞
Attention (When installing the
coil and the metal fitting)
● Securely attach the coil stopper to the
valve body fixing pipe.
→ If wrongly attached, the expansion
valve may function abnormally,
damaging the compressor.
● Take care not to allow the metal fitting
damage or pinch the lead wire.
→ Malfunction of the expansion valve
may arise.
Curved part of the pipe
Brazed part of the pipe
Anti-condensation tube
＜ Replacement of main unit ＞