Electronic Expansion Valve (Eev), Economizer Modulation; Valve (Emv), Discharge Modulation Valve (Dmv) - Daikin LX10F11B3 Service Manual

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4.8.11 Electronic Expansion Valve (EEV),
Economizer Modulation Valve (EMV),
Discharge Modulation Valve (DMV)
Name
Electronic Expansion Valve
EEV
Economizer Modulation Valve
EMV
Discharge Modulation Valve
DMV
(1) Replacing the coil
①Remove the cable band securing coil lead wire.
②Disconnect the connector on CPU board.
③Remove the fixing plate and the coil.
④Replace the old coil with a new one.
⑤Attach the coil and the fixing plate.
⑥Plug in coil connector on CPU board.
⑦Fix the coil lead wire with a cable band.
(2) Replacing the body
※Recover refrigerant at first and proceed following step.
①Remove the cable band fixing the coil lead wire.
② Detach the anti-condensation tube until the
curved part of the pipe.
③Remove the fixing plate and the coil.
④Un-solder valve piping.
⑤Solder in the new valve body.
→ Braze the new valve body while cooling it with a wet cloth.
Maximum body temperature: 120℃ (248 F) or less
⑥Mount the coil and the fixing plate.
⑦Install the anti-condensation tube.
⑧Fix the coil lead wire with a cable band.
Curved part of the pipe
＜Replacement of main unit ＞
Type
HCM-MD12DM-2
Coil
Socket (Red)
HCM-BD35DM-2
Body
Valve size: 3.5mm
HCM-MD12DM-3
Coil
Socket (White)
HCM-BD24DM-1
Body
Valve size: 2.4mm
Coil HCM-MD12DM-4
Body HCM-BD120DM-2
Brazed part of the pipe
Anti-condensation tube
Fixing plate
Main unit
Cable band
＜Part names＞
Coil
Valve body
＜Replacement of the coil＞
Correctly installed
＊ It clicks when installed.
＜Confirmation of fixing plate installation＞
Attention (When installing the
coil and the fixing plate)
● 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 fixing plate
damage or pinch the lead wire.
→ Malfunction of the expansion valve
may arise.
4-21
Coil
Cable band
Lead wire
Anti-condensation tube
Fixing plate
Fixing pipe
Fixing plate
Stopper
Fixing pipe
Wrongly installed