AEC FSS Series 1.5- 10 HP Fountain Solution Systems - Manual (Page 72)

FSS Series Fountain Solution Systems Page 71
IAE-600
10-5 Return Pump Troubleshooting
Problem Possible cause Solution
The exhaust port (silencer) of
pump is clogged with sludge. Check and clean the exhaust
port and silencer.
Air is not supplied.
Start the compressor and
open the air valve and air
regulator.
The supply air pressure is
low. Check the compressor and
the configuration of air piping.
Air leaks from connection
parts. Check the connection parts
and tightness of bolts.
Air piping or peripheral
equipment is clogged with
sludge.
Check and clean the air
piping.
The flow valve on the
discharge side is not open. Open the flow valve on the
discharge side.
The spool stopped in neutral
position.
Press the RESET button.
The fluid piping is clogged
with sludge. Check and clean the fluid
piping.
Pump does not run.
The pump is clogged with
sludge. Disassemble the casing,
check and clean.
The suction lift or discharge
head is long.
Confirm the piping
configuration and shorten the
length.
The discharge-side fluid
piping (including the strainer)
is clogged with sludge.
Check and clean the fluid
piping.
The valve on the suction side
is not open. Open the valve on the
suction side.
The pump is clogged with
sludge. Disassemble the casing,
check and clean.
Pump runs but fluid does not
come out.
The ball and valve seat are
worn out or damaged. Disassemble the manifold,
check and replace parts.
The supply air pressure is
low. Check the compressor and
configuration of air piping.
Air piping or peripheral
equipment is clogged with
sludge.
Check and clean the air
piping.
The discharge-side flow valve
opens differently. Adjust the discharge-side
flow valve.
Air is taken in together with
fluid.
Replenish fluid and check the
configuration of the suction-
side piping.
Flow (discharge volume) is
decreased.
Cavitation occurs.
Adjust the supply air
pressure, discharge pressure
and shorten the suction lift.