YAMIT E.L.I. AF800N Series, Service Maintenance Manual

Page: 22 / 40

22
Pressure difference between inlet and outlet - above 0.5 bar
1. Check the differential pressure indicator adjustment.
2. Verify that the line pressure matches the filter’s operational pressure.
3. Perform an additional flushing cycle manually by pushing the test button
located on the outside of the control box. (See Figure 3).
Disconnect the control tube from the
flushing valve's lower section. Perform a
flushing cycle manually, by operating the
handle located on the solenoid
Check batteries
condition
Water does not
come out of the
control tube
Water comes
out of the
control tube
Not OK OK
Check the hydraulic
flushing valve for
obstruction. Replace if
required
Check the hydraulic
flushing valve for
obstruction. Replace if
required
Replace
batteries
Check the electrical
connections on the control
card and the solenoid
electrical connection at the
differential pressure indicator
Control Water is
present
No Control Water Not OK OK
Solenoid faulty.
Replace the
solenoid
Check the
distributor unit or
the control tube
for obstructions
Short the differential
pressure indicator wires
on the control card
Connect properly
Flushing cycle
doesn't start
Flushing cycle
starts
Replace the differential
pressure indicator
A
Flushing cycle
doesn't start
Flushing cycle
starts
7. Troubleshooting
7
AF800N