Xo 4, Troubleshooting Manual, Page: 56 / 88

XO 4 & XO FLEX TROUBLE SHOOTING GUIDE
Version 3.30 56
WATER/AIR XO4 AND XO FLEX
Failure description Reason Solution
“WATER LEAK!!”
“CALL SERVICE”
The water leak sensor has detected
an overflow or leak and closes the
water valve
Determine the reason for the
overflow or leak.
The valve filling the mixing cup either
the “water treatment – backflow
prevention” or the “suction clean” do
not close properly.
- V39 – Water valve for Suction clean
system
- V27 – Water valve for the backflow
prevention.
See diagram above for more
information
On the faulty valve:
Remove coil, disassemble valve and
clean or replace valve plunger.
Clean and dry the water in the
overflow tank and water leak sensor
S33 if not done properly the
following message “water leak!! Call
service” will be displayed.
Water pressure failure on
the instrument bridge
Fault in the main water valve V10 or
in the valve control.
Check the voltage.
Check the pressure before and after
the valve.
Check the resistance of the valve
coil and replace it if it is defective.
Disassemble the valve, clean, or
replace the valve gasket.
The “stand Controller” is defective The “Stand Controller” AO-891
controls all valves, level sensors,
pumps, suction and patient chair
signals of the XO unit.
For more information concerning the
“Stand Control AO-891” and its
function, consult page 20 & 21
If the “Stand controller” is working,
check the following
The water pressure regulator is
closed or defective Check the water pressure setting
and replace it if defective.
Air pressure failure on the
instrument bridge.
Fault in the V12 main air valve or
valve control
(if pressure tank is present)
Measure the voltage on valve
Check the pressure before and after
the valve
Check the valve coil resistance and
replace it if defective
Disassemble the valve, clean, or
replace the valve gasket.
The air pressure regulator is closed
or defective.
Check the pressure setting and
change it in case of failure.
The “stand Controller” is defective The "Stand Controller" AO-891
controls all valves, level sensors,
pumps, suction and patient chair
signals of the XO unit.
For more information concerning the
“Stand Control AO-891” and its
function, consult page 20 & 21
If the “Stand controller” is working