AUKS AL-H18/4DR1(U), Service Manual

Page: 112 / 161

AUKS DC Inverter 1 Drive1 50HZ R410A Trouble shooting
112
EXV
(Electronic
expansion
valve)
Function of EXV:
Utilize aperture and length change bring
pressure gap, control refrigerant flow
quantity and pressure.
EXV is controlled by PCB, more precisely.
Four way valve
Function of 4 way valve:
When change cooling mode into heating
mode, it will change the flow direction of
refrigerant;
When heating, the valve get electricity
(cooling without electricity), the slip
assembly move to the right connect pipe 2
and 3, so change the flow direction.
Stop valve
Function:
To stop or release refrigerant, only
on/off, can’t adjust or throttle
Muffler
Function:
Eliminate the system noise
Gas and liquid
separator
Function:
Separate liquid and gas refrigerant,
to protect the compressor