Zoeller MEDIUM X2 - Troubleshooting

Possible faults 57
10.2 TROUBLESHOOTING
Fault
Cause of fault
How to rectify the fault
Person
responsible
Decrease in
power or
operating speed
Engine speed too low
Check engine speed
(→ chassis manual)
One loading cycle should last
approx. 22 s.
Qualified person
Too low oil level in the
hydraulic oil tank
Top up oil to the recommended
level.
Too much foam forms in the
oil tank; the pump partly
receives oil foam
Use recommended oil type.
Change oil.
Replace seals, check connections,
tighten if necessary
(→Hydraulic oil change)
Qualified person
The oil heats up too much
due to too high viscosity
Water condensate in the oil
tank
Leaking hoses, pipes or
connectors
The pump sucks in air
Pressure relief valves for main
pressure, back pressure or
holding pressure are
incorrectly set, dirty or stuck.
Return to ZOELLER service for
cleaning, adjustment or
replacement.
Manufacturer
Vacuum in the oil tank
Replace ventilation filter in the
tank
Qualified person
Oil pressure too
low, even though
the hydraulic oil
pump is working
correctly
Incorrectly set pressure relief
valve
Return to ZOELLER service for
cleaning, adjustment or
replacement.
Manufacturer
The pressure relief valve jams
A leaky connection or blocked
nozzle hole in the block
Oil pressure too
low
The hydraulic oil pump is
damaged if the pressure
drops for a long time when
the oil is warm
Replace the hydraulic oil pump
Qualified person
Manual control:
Pressing the
button does not
start the function
There is no controlling
voltage or voltage is too low
(<20V) or the button is
damaged
Check the electrical installation
Manufacturer
Solenoid valves are damaged,
or the valve slider is jamming
Check solenoid valves
Return to ZOELLER service for