Refrigerant System Diagram - Mitsubishi Electric PUZ-HA30NHA4 Service Manual

9

REFRIGERANT SYSTEM DIAGRAM

PUZ-HA30NHA4
Ball valve
Refrigerant
GAS pipe
connection
15.88(5/8)
Strainer
#50
Charge plug
(Low pressure)
Strainer
#100
Linear
expansion valve B
Refrigerant
LIQUID pipe
connection
9.52
Strainer
(3/8)
#100
Stop valve
(with service port)
Refrigerant recovering (pump down)
Perform the following procedures to recover the refrigerant when moving the indoor unit or the outdoor unit.
1 Turn on the power supply (circuit breaker).
wWhen power is supplied, make sure that "CENTRALLY CONTROLLED" is not displayed on the remote controller. If
"CENTRALLY CONTROLLED" is displayed, the refrigerant recovering (pump down) cannot be completed normally.
2 After the liquid stop valve is closed, set the SWP switch on the control board of the outdoor unit to ON. The compressor
(outdoor unit) and ventilators (indoor and outdoor units) start operating and refrigerant collecting operation begins. LED1
and LED on the control board of the outdoor unit are lit.
wSet the SWP switch (push-button type) to ON in order to perform refrigerant recovering operation only when the unit
is stopped. However, refrigerant recovering operation cannot be performed until compressor stops even if the unit is
stopped. Wait  minutes until compressor stops and set the SWP switch to ON again.
3 Because the unit automatically stops in about  to  minutes after the refrigerant collecting operation (LED1 is not lit and
LED is lit), be sure to quickly close the gas stop valve.
wIn case the outdoor unit is stopped when LED1 is lit and LED is not lit, open the liquid stop valve completely, and then
repeat step 2  minutes later.
wIf the refrigerant collecting operation has been completed normally (LED1 is not lit and LED is lit), the unit will remain
stopped until the power supply is turned off.
4 Turn off the power supply (circuit breaker).
PUZ-HA36NHA4
Solenoid valve
(Four-way valve)
Low pressure
switch 63L
Strainer
#100
Strainer
#100
Power
receiver
Linear
expansion valve C
Charge plug
(High pressure)
Muffler
High pressure
switch 63H
Thermistor
TH32
(Outdoor pipe)
Thermistor TH4
(Discharge)
Linear expansion valve A
Injection port
Compressor
Heat inter change circuit
16
unit : mm (inch)
Thermistor TH7
(Outdoor)
Heat exchanger
Thermistor
TH6
(Outdoor
2-phase pipe)
Thermistor TH3
(Outdoor pipe)
Distributor
Thermistor TH33
(Outdoor pipe)
Strainer
#100
Refrigerant flow in cooling
Refrigerant flow in heating