Fujitsu Airstage UTP-RU01AH, Service Manual, Page: 201 / 246

Pipe (In)
Pipe (Out)
Pipe (In)
Pipe (Out)
AC AC
SOLENOIDE COIL SOLENOIDE COIL
Comp. OFF
or Discharge temp. < 50°F(10°C)
or Discharge temp. - High pressure saturated temp. < 41°F(5°C) Comp. ON
and Discharge temp. > 50°F(10°C)
and Discharge temp. - High pressure saturated temp. > 46.4°F(8°C)
OPEN CLOSE
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 ---> Normal
The sound of operation noise is not heard. ---> Replace SV3
- When SV3 is closed
The sound of operation noise is heard ---> Replace Main PCB
The sound of operation noise is not heard. ---> Normal
If the valve does not open when the connector of SV4 is removed from Main PCB,
Replace SV4.
Pipe (In)
Pipe (Out)
Pipe (In)
Pipe (Out)
AC AC
SOLENOIDE COIL SOLENOIDE COIL
Normal TEMP.
Normal TEMP.
Hi TEMP.
Hi TEMP.
OPEN
CLOSE
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. Except cooling operation
or Cooling operation at outside air temperature < 84.2°F(29°C)
=
=
=
04-112