Mitsubishi Electric PURY-P200 Service Handbook page 101

10. Cooling/heating circuit control and an overview of the functions of system equipment
Operation
Simplified diagram of refrigerant circuit
status
4-way valve
A
O
M
Cooling
only Fan
High-pressure
liquid
Outdoor unit
A
O
B
Cooling
main
C
A
O
Heating
only
A
M
Heating
main
K
Gas
2 phase
Liquid
Reverse-flow
check valve Switch valve
M
Low-
pressure
Low-pressure 2 phase
pipe
Low-pressure
M
gas
M
Heat exchanger
M
Vapor-liquid
separator
Indoor unit
High-
pressure
pipe LEV
High-pressure
liquid
BC controller
Cooling
N
M
Low-
pressure
Cooling Low-pressure 2 phase
gas
N
M
Cooling
N M
Heating
High-
F
G
pressure
gas
D
E
High-pressure
2 phase
I
High-pressure
J
K
liquid
L
Low-
pressure
High-pressure liquid
2 phase
L
L
L
High-
pressure
gas
F
High-pressure
liquid
Heating
J
B
C
Low-
pressure
Heating High-pressure liquid
2 phase
B C
Heating
B C
Cooling
H
G
High-
pressure
gas
Low-pressure Low-pressure
I gas 2 phase
High-pressure
E
liquid
- 98 -
Refrigerant cycle-simplified diagram
L
Pressure
L
L
L
Liquid
LEV
L
M
L
L
J G I
L
L
K H
H
M
M
M
L
M
M
M
F
D
D
C
D
F
E
D
F
G
I
Enthalpy
O
Gas-liquid mixing
(energy)
D C F E
N
O
O
J H
K
M
Gas
A
B
A
A
B
A