Troubleshooting
90/ 100
Oleolift-C
Malfunction
Cause(s)
Actions
Submersible pump
does not pump or
pumps too little
or tank full
Ball valve and/or gate valve in the pressure
pipe is not fully open or is closed
Fully open the ball valve or stop valve in the
pressure pipe
Pressure pipe obstructed
Clean the pressure pipe
Impeller (submerged pump) obstructed
Submerged pump maintenance required
(ACO Service)
Pump parts are worn
Submerged pump repair required
(ACO Service)
Submerged pump
only runs in manual
operation
Control line of the level switching is leaking,
incorrectly laid, kinked or obstructed
Check the control line
Pressure bell blocked
Clean the pressure bell
Closed back pressure bell defective
Replace the closed pressure bell
Level sensor is defective
Exchange the level sensor
Float switch is defective
Exchange the float switch(es)
Knocking noises/
vibrations in the
pressure pipe on
switching off the
submerged pump(s)
Stop delay period of the submerged pumps
is too short
Increase submerged pumps after-running period
Fault messages on the control unit
Display panel
LED display(s)
Cause(s)
Actions
Maximum current
??
Power consumption too high
(automatic shut-off)
Acknowledge malfunction
If the malfunction remains:
Contact ACO Service
High water level
alarm
??
Ball valve and/or gate valve
in the pressure pipe is not
fully open and/or is closed
Fully open the ball valve
or stop valve in the
pressure pipe
Automatic mode is
switched off
Switch on automatic mode
Pump motor is defective
Submerged pump
replacement required
(ACO Service)
Impeller (submerged pump)
obstructed
Submerged pump
maintenance required
(ACO Service)
Pressure pipe obstructed
Clean the pressure pipe
Pump parts are worn
Submerged pump repair
required (ACO Service)