Fujitsu AOYG45LAT8 User Manual page 110

OK
Check Point 4 : Check Noise at start up
Turn on Power and check operation noise.
If an abnormal noise does not show, replace Controller PCB.
>>
OK
Check Point 5 : Check Opening and Closing Operation of Valve
When Valve is closed,
it has a temp. difference between Inlet and Outlet.
CLOSE
Example : Hot Gas
Pipe (In)
Hi TEMP.
OK
Check Point 6 : Check Strainer
Strainer normally does not have temperature difference between inlet and outlet as shown in (1), but if there is a difference
as shown in (2), there is a possibility of inside clogged. In this case, replace Strainer.
(1)
Pipe (In)
Pipe (Out)
Normal TEMP.
Pipe (Out)
02-61
If it is open,
it has no temp. difference between Inlet and Outlet.
OPEN
Example : Hot Gas
Pipe (In)
Hi TEMP.
(2)
Pipe (In)
Pipe (Out)
Hi TEMP.
Pipe (Out)