Check Operation Of Sv3; Check Opening & Closing Operation Of Sv4 - Fujitsu Airstage VR-II Series Service Manual

Check Point 4-2 : Check operation of SV3
Check the operation noise when the connector of SV3 is removed.
- When SV3 is open
The sound of operation noise is heard
The sound of operation noise is not heard. ---> Replace SV3
- When SV3 is closed
The sound of operation noise is heard
The sound of operation noise is not heard. ---> Normal
Comp. OFF
or Discharge temp. < 50°F(10°C)
=
or Discharge temp. - High pressure saturated temp. < 41°F(5°C)
Pipe (In)
SOLENOIDE COIL
Check Point 4-3 : Check opening & closing operation of SV4
Check if Valve is operating normally.
(When Valve opens, Inlet and Outlet temperature is raised.)
Cooling operation at outside air temperature > 87.8°F(31°C)
and continuous operation time is more than 30min.
and when it has passed more than 60min.
since the last SV4 close condition.
Pipe (In)
Normal TEMP.
CLOSE
Pipe (Out)
Normal TEMP.
If the valve does not open when the connector of SV4 is removed from Main PCB,
Replace SV4.
---> Normal
---> Replace Main PCB
CLOSE
Pipe (Out)
AC
=
SOLENOIDE COIL
AC
Comp. ON
and Discharge temp. > 50°F(10°C)
and Discharge temp. - High pressure saturated temp. > 46.4°F(8°C)
Pipe (In)
SOLENOIDE COIL
Except cooling operation
or Cooling operation at outside air temperature < 84.2°F(29°C)
OPEN
SOLENOIDE COIL
04-112
=
OPEN
Pipe (Out)
AC
=
Pipe (In)
Hi TEMP.
Pipe (Out)
Hi TEMP.
AC