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8. PROBLEMS AND SOLUTIONS
A diagnostics table is provided below that indicates the main anomalies, the probable causes and the possible solutions.
If you were not able to solve the problem after consulting the diagnostics table, do not try to find the fault by disassembling
machine parts but contact the Dropsa technical office and report the anomalies that have been discovered, with a detailed
description.
Problem
Cause
Solution
Pump does not delivery
lubricant
The electric motor is not operating.
The tank is empty.
The pump does not prime. Cause for the pump not
priming:
The motor is rotating in the inverse direction
(clockwise);
The motor is rotating in the correct direction,
but the spatula is not rotating;
Air bubbles in the lubricant.
The pressure control valve (bypass) was calibrated
at a value that is too low
Presence of dirt in the non-return valve
Check the connection between the motor and
the electric power supply line.
Check the motor windings.
Check that the motor terminal board
connection plates have been positioned
according to the power supply voltage.
Fill the tank.
Attention: if the tank emptied itself and the
electric signal indicating that the minimum
level was reached was not given, check the
minimum level contact.
Remove the tank cover and check that the
spatula rotates anti-clockwise and moves the
lubricant; otherwise, invert two of the three
motor phases.
See above.
Disconnect the pump delivery pipe and bleed
the lubricant until the air bubbles have been
eliminated.
The pump does not
pressurise.
There may be dirt on the pumping element check
valve cone.
Clean the pumping element check valve cone
and seat, bleeding the lubricant.
Problem
Cause
Solution
No minimum level signal
when there is no
lubricant in the tank.
Minimum level incorrectly regulated.
Check the correct operation of the level probe
as follows:
disassemble the minimum level assembly and
recalibrate the capacitive probe.
Minimum level
selection, with lubricant
below the minimum and
pump operating.
Minimum level incorrectly regulated.
The control panel lamp always remains on:
check the electric connection and replace the
capacitive probe if necessary.
ATTENTION:
The machine may only be opened and repaired by authorized Dropsa personnel.
