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8. TROUBLESHOOTING
Below is a diagnostic table showing the main faults, the probable causes and the possible solutions.
In the event of doubts and/or problems which cannot be solved, do not proceed to look for the fault by dismantling parts of the
machine, but contact the Dropsa Technical Office.
Fault
Cause
Solution
The electric pump is
not delivering any
lubricant.
The electric motor is not functioning.
The tank is empty.
The pump is not triggered. Causes of the pump’s
failure to trigger:
The motor is turning in an inverted direction
(clockwise);
The motor is turning in the right direction but the
stirring paddle is not turning;
Presence of air bubbles in the lubricant.
The pressure adjustment valve (bypass) has been
calibrated at too low a value
Presence of dirt in the non-return valve.
Check the connection between motor and
electric supply line.
Check the motor winding.
Check that the connection plates for the motor
terminal box are positioned in accordance with
the supply voltage.
Fill the tank.
N.B.: If the tank was emptied without the
electric signal for reaching the minimum level
being given, the minimum level contact must
be checked.
Remove the cover from the tank and check
that the stirring paddle is turning anticlockwise
and that the lubricant is moving; if not invert
two of the three motor phases.
See above.
Remove the pump delivery pipe and drain off
the lubricant until the air bubbles have been
eliminated.
The pump will not
go under pressure.
Possible dirt on the cone of the pump stop valve
Internal gasket between pumping element and
manifold unit broken.
Clean the cone and the pumping element stop
valve housing, draining off the lubricant.
Replace the gasket (code 3190489).
No signal indicating
minimum level
when there is no
lubricant in the tank.
Incorrect adjustment of minimum level.
Check the correct functioning of the level
probe in the following way:
Dismantle the minimum level unit and
recalibrate the capacitive probe.
Selection of
minimum level, with
lubricant below the
minimum and pump
working.
Incorrect adjustment of minimum level.
The light on the control panel is still on: check
the electric connection and, if necessary,
replace the capacitive probe.
