6
8. TROUBLESHOOTING
The following diagnostic table indicates the main anomalies which may be encountered, the probable causes and
possible solutions. If you cannot solve the problem, do not attempt to disassemble the unit, but contact the
Engineering Department of DROPSA S.p.A.
N
A
NOMALY
C
AUSE
R
EMEDY
01 Motor does not
operate
Power supply failure
Verify power supply system, and check the fuse
Ratiomotor does not operate Replace the ratiomotor
02 Pump does not
deliver lubricant
Reservoir is empty
Refill the tank with clean lubricant,
Air-bubbles in lubricant
Disconnect main piping from pumping element fitting.
Operate the pump in the manual mode until lubricant
free of air-bubbles comes out of the fittings
Obstructed suction pipe-line Disassemble the pumping unit and clear the suction
pipe-line
03
Pump operates but
does not deliver
lubricant to the
bearing- points
Disconnected piping
Inspect piping and replace the wear pipes
Blocked progressive
distributor
Clear the distributor. Replace it, if necessary
N
A
NOMALY
C
AUSE
R
EMEDY
04
Lubricant reaches the
bearing-points in
incorrect quantities
The distributor is not
correctly connected to the
bearing-points.
Verify that the dosages are those indicated in the
system diagram
Delivery is not correct (only
for adjustable delivery pump
unit).
Adjust delivery by means of regulation screw
05
Pump starts
lubricating but stops
immediately
Faulty motor or high output
consumption.
Allow the pump being cooled for a few minutes and try
again. If the problem still continues, contact the
Customer Service
06 Irregular flow rate
Screw C, which secures the
pump element D and return
spring E, is loose (only for
adjustable delivery pump
unit).
Remove the pump element assembly from the pump
body and completely disassemble it.
To reassemble the pump element assembly see the
sequence in the diagram.
Check and clean all pump unit parts. Verify the
component integrity.
Warning: put some Loctite type sealant on screw C,
which is inserted into pump element D. Hold the pump
element between wooden vice clamps to prevent
damage to the lapped surface. Lock up very well the
element B.
07
The system doesn’t
reach the pressure
Delivery valve dirty.
Delivery valve damaged.
Spring broken
Dismount the valve A, clean it and mount following the
showed sequence.
Replace the pumping unit.
