Service manual

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REFRIGERANT SYSTEM DIAGRAM
PUZ-HA30NHA4 PUZ-HA36NHA4 unit : mm (inch)
Distributor
Thermistor TH7
(Outdoor)
Heat exchanger
Refrigerant
GAS pipe
connection
:15.88(5/8)
Refrigerant
LIQUID pipe
connection
:9.52
(3/8)
Stop valve
(with service port)
Strainer
#100
Power
receiver
Linear
expansion valve B
Linear
expansion valve C
Linear expansion valve A
Thermistor
TH6
(Outdoor
2-phase pipe)
Thermistor TH3
(Outdoor pipe)
Charge plug
(Low pressure)
Charge plug
(High pressure)
Heat inter change circuit
Thermistor TH4
(Discharge)
Compressor
Injection port
Strainer
#50
Solenoid valve
(Four-way valve)
Strainer
#100
Strainer
#100
Strainer
#100
Strainer
#100
Muffler
Ball valve
Thermistor TH33
(Outdoor pipe)
Thermistor
TH32
(Outdoor pipe)
Low pressure
switch 63L
High pressure
switch 63H
Refrigerant flow in cooling
Refrigerant flow in heating
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 LED2 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 3 minutes until compressor stops and set the SWP switch to ON again.
3Because the unit automatically stops in about 2 to 3 minutes after the refrigerant collecting operation (LED1 is not lit and
LED2 is lit), be sure to quickly close the gas stop valve.
wIn case the outdoor unit is stopped when LED1 is lit and LED2 is not lit, open the liquid stop valve completely, and then
repeat step 2 3 minutes later.
wIf the refrigerant collecting operation has been completed normally (LED1 is not lit and LED2 is lit), the unit will remain
stopped until the power supply is turned off.
4
Turn off the power supply (circuit breaker).