Service manual

12
9 REFRIGERANT SYSTEM DIAGRAM
PUHZ-SW40VHA PUHZ-SW40VHA-BS
PUHZ-SW50VHA PUHZ-SW50VHA-BS
Unit : mm (inch)
Refrigerant flow in cooling
Refrigerant flow in heating
Thermistor TH7
(Ambient)
Heat exchanger
Refrigerant GAS pipe
connection ø12.7(1/2F)
Refrigerant LIQUID pipe
connection ø6.35(1/4F)
Stop valve
Strainer
#100
Power
receiver
Linear
expansion valve B
Thermistor TH6
(2-phase pipe)
Thermistor TH3
(Liquid)
Charge plug
High pressure
switch 63H
Thermistor TH4
(Discharge)
Thermistor TH34
(Comp. surface)
Compressor
Strainer
#50
Solenoid valve
(Four-way valve)
Distributor
Linear expansion valve A
Strainer
#100
Stop valve
(with service port)
High pressure sensor
(63HS)
COMP
H/P SW
REV/V
Charge plug
P-Sensor
LEV-A
LEV-B
TH3
TH4
TH6
TH7
TH34
DC inverter twin rotary compressor (Mitsubishi Electric Corporation)
For protection (OFF:4.15MPa)
Change the refrigerant circuit (Heating / Cooling) and for Defrosting
High pressure / Low pressure / For production test use
For calculation of the condensing temperature from high pressure
Heating:Secondary LEV Cooling:Primary LEV
Heating:Primary LEV Cooling:Secondary LEV
Heating:Evaporating temperature Cooling:Sub cool liquid temperature
For LEV control and for compressor protection
Outdoor 2-phase pipe temperature
For fan control and for compressor frequency control
For compressor protection
For accumulation of refrigerant
Compressor
Highpressureswitch(63H)
Reversing (4-way) valve (21S4)
Charge plug
High pressure sensor (63HS)
Linear expansion valve -A
Linear expansion valve -B
Liquid temperature thermistor
Discharge temperature thermistor
2-phase pipe temperature thermistor
Ambient temperature thermistor
Comp.surface temperature thermistor
Power Receiver
Symbol Part name
Detail
Power Receiver
OCH525