XO 4 & XO FLEX TROUBLE SHOOTING GUIDE
Version 3.30 59
The liquid detection sensor
pins do not work properly.
It is important that the 3 sensor pins
have no contact with the inner
surface of the mixing cup or partition
wall.
Correct the sensor probes to ensure
that they do not touch the inner
surface of the mixing cup.
Check that the partition wall is
inserted into the grooves of the cup
Lower LED off (Mixing cup
filled)
Sensor PCB is defective or defective
cable.
if the LED flashes it might indicate
that the cable is defective, or has a
short circuit change the cable.
Check the connections of the "Water
clean" cable CA-033 or “Suction
Clean” cable CA-008.
If it continues to flash change AP-
869 PCB.
when water reaches the
short liquid detector sensor
probes.
Ether the sensor pins on PCB or the
cable are defective.
if the LED flashes it might indicate
that the cable is defective, or has a
short circuit change the cable,
Check the connections “Water
clean” cable CA-007 or CA-008 for
“Suction Clean” cable.
If it continues to flash change AP-
869 PCB.
NOTE: It is important that the PCB is dry and clean.
Do not touch the PCB if you have grease, suction system disinfection liquid on your fingers. The
electronics of the AP-869 (AD-620) PCB is very sensitive.
The sensors control the levels in the mixing cup. The filling of the liquid stops when the upper level is
reached (short spindle).
Filling starts again when the lower level is reached (no liquid between the two long spindles).
The sensors are very sensitive and can be tested with a wet finger.
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