Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 77

[ III Outdoor Unit / BC Controller Components ]
(2) Front view of a refrigerant circuit
Linear expansion valve (LEV1)
Pressure switch
High-pressure
sensor
4-way valve
Low-pressure
check joint *1
Gas-side
ball valve *1
*1 The diameter of this charge plug is 5/16".
Use the adapter that is supplied with the product if using tools designed primarily for use with 1/4"-diameter materials.
(3) Rear view of a refrigerant circuit
Low-pressure sensor
Liquid-side ball valve *1
Accumulator Subcool coil
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High-pressure
check joint *1
Discharge muffler
Inverter compressor
Linear expansion valve (LEV1)
4-way valve
Fusible plug
Oil separator
Accumulator