DVP LB.5, Operating And Maintenance Instructions Manual, Page: 19 / 110

Operating and Maintenance Instructions
EN
LC.2 – LC.4 – LB.5 – LB.6 – LB.8 – LC.12 – LC.20
18
8702036 – 12/04/2016 – R.7 www.dvp.it
9 TROUBLESHOOTING
DAMAGE CAUSE REMEDY
(A)
The pump does not run
No voltage Provide power supply
Thermal switch has tripped Identify reason and activate switch
Room temperature is too low
Restore room temperature to allowed
range
Motor winding damaged Contact Service Department
(B)
The pump cannot
reach stated vacuum
Low oil in tank Top up oil
Oil contaminated Change oil
Discharge clogged Check couplings at outlet
(C)
Pump is noisy
Air exhaust filter clogged Change the air exhaust filter
Bearings damaged Contact Service Department
Vanes worn out Contact Service Department
(D)
Pump runs hot
Oil is not the suitable type Change oil
Poor room ventilation Install an auxiliary ventilator
Motor fan broken Contact Service Department
Wrong power supply to motor Check power supply
Discharge clogged Check couplings at outlet
(E)
High oil consumption
High working pressure
(close to atmospheric pressure)
Check oil level frequently
Pump runs hot See point “D”
Air exhaust filter clogged Change the air exhaust filter
(F)
Pump does not
maintain vacuum after
power-off
Check valve damage (if fitted) Contact Service Department
(G)
Pump leaks oil
Tank screws or plugs loosened Tighten screws or plugs
Tank gaskets damaged Contact Service Department
Oil sight glass not tightened Tighten the oil sight glass