Xo 4, Troubleshooting Manual

Page: 63 / 88

XO 4 & XO FLEX TROUBLE SHOOTING GUIDE
Version 3.30 63
The main air solenoid valve
V12 (Ø2.5, 3-way, 1/8RG) is
defective. Refer to the chapter
WATER/AIR XO4 and XO Flex
Page 52 for explanation.
Verify that the connectors are
properly inserted.
Measure the voltage at the coil
connectors 24VDC
Measure the coil resistance
(≈100Ω).
Change if defective UC-583
Disassemble and clean the valve
at the piston.
Change the plunger seat gasket
(MR-150)
Overflow (mixing Cup). Sensor pins are not properly
placed in the bucket or defective. Refer to chapter “Liquid sensor
PCB AP-869” on page 56
The water supply valve V27 is
defective The piston of the solenoid valve
does not close properly.
Disassemble and clean the valve
at the piston.
Change the plunger seat gasket
(MR-150).
Air bubbles “shoots” water
out of mixing cup.
The check valve is defective or
incorrectly mounted It is very important that the check
valve is mounted correctly to
avoid any backflow into the
mixing cup when the container is
pressurized.
Unscrew and remove the mixing
bucket above the tank to access
the check valve. Unscrew the
plug and clean or replace it (UG-
809).