Fault
1701429 • 2018/12
JUDO JSY-LF-AT
17
6
Fault
Fault
Possible cause Remedy
Backwash
valve is not fully
closed.
Backwash water contin-
ues running.
Dirt in backwash
valve.
Water flow decreases.
Sieve clogged.
Red warning light illumi-
nates.
Fault in the
automatic con-
trols.
Red warning light illumi-
nates and signal tone
sounds. Backwash water
may still be running.
The backwash-
ing valve is not
fully closed.
Possibly dirt in
backwashing
valve.
Perform backwashing:
1.
Pull the mains plug out of the socket.
2.
Wait until all warning lights are off.
3.
Plug the power supply unit into the
socket.
If the fault occurs again: Inform the installer
or the closest customer service point.
Simultaneous flashing of
the red and green warn-
ing lights (no backwash-
ing will be triggered).
Battery is empty
or incorrect bat-
tery type.
1. Pull the mains plug out of the socket.
2.
Insert new 9V Alkaline battery
3.
Plug in the plug again.
There are leaks in the fil-
ter bowl.
Filter bowl becomes
clouded.
Hairline cracks on the fil-
ter bowl.
Filter bowl was
exposed to high
temperatures or
solvents.
•
Inform the installer or the closest cus-
tomer service point.
•
If water escapes, close shut-off valves.
Have the filter bowl replaced immedi-
ately.
The downstream pres-
sure increases slowly at
zero flow.
Inadmissi-
ble pressure
increase due to
process water
heating.
Check the safety relief valve of the warm
water boiler.
Inform the installer or the closest customer
service point.
Troubleshooting