Lennox MHA Series - Electronic Components (Mwha018 S4); Electronic Components (Mwha024 S4); Fan Disassembly (MWHA009 S4 and MWHA012 S4)

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17.2.4. Electronic Components (MWHA018S4)
Step 1. Removetheconnectorforthecompressor.
Step 2. Pulloutconnectorsforthecondensercoil
temperaturesensor(T3),outdoorambient
temperaturesensor(T4)anddischarge
temperaturesensor(TP).
Step 3. Disconnectthefour-wayvalvewire.
Step 4. Disconnectthegroundwire.
Step 5. Removetheconnectorfortheindoorunit.
Step 6. Removeelectroniccontrolbox.
17.2.5. Electronic Components (MWHA024S4)
NOTE: Antistatic gloves must be worn when you
dissemble the electronic box.
NOTE: Remove the panel plate before disassembly the
fan.
Step 1. Removetheconnectorforthecompressor.
Step 2. Pulloutthetwobluewiresconnectedtothe
expansionvalue(notapplicabletoACunitsonly)
Step 3. Pulloutconnectorsforthecondensercoil
temperaturesensor(T3),outdoorambient
temperaturesensor(T4)anddischarge
temperaturesensor(TP).
Step 4. Disconnecttheexpansionvalve.
Step 5. Removeelectroniccontrolbox.
Compressor
Reactor
4-way valve
Fan Motor
EEV
T3, T4 and TP
17.2.6. Fan Disassembly (MWHA009S4 and
MWHA012S4)
NOTE: Antistatic gloves must be worn when you
dissemble the electronic box.
NOTE: Remove the panel plate before disassembly the
fan.
Step 1. Removenutsecuringthefanwithaspanner.
Step 2. Removethescrewssecuringthetopcover.