Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 87

[ III Outdoor Unit / BC Controller Components ]
(2) Front view of a refrigerant circuit
Low-pressure check joint *1
High-pressure
sensor
4-way valve
(21S4a)
Check-valve
block 1
Ball valve on low pressure
pipe side *1
Ball valve on high pressure
pipe side *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
Accumulator
4-way valve
Fusible plug
(21S4b)
High-pressure Check-valve Low-pressure
check joint *1 block 2 sensor
Fusible plug
Solenoid valve block 2
- 78 -
Pressure switch
Oil separator Oil separator
Inverter compressor(No.1)
(No.1) (No.2)
Solenoid valve block 1
Accumulator
Non-inverter
compressor(No.2)
Oil balance pipe
Low-pressure sensor