DVP LB.5WR - 9 Troubleshooting

Operating and Maintenance Instructions
LB.5WR – LC.25WR – LB.40WR – LB.60WR – LC.105WR
EN
16
www.dvp.it 8702037 – 01/01/2011 – R.0
9 TROUBLESHOOTING
DAMAGE CAUSE REMEDY
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
(A)
The pump does not run
Suction of unpermitted substances
(only LB.5WR)
Contact Service Department
Low oil in tank Top up oil
Oil contaminated Change oil
Intake filter obstructed (only LB.5WR) Replace the filter cartridge
Pump gaskets damaged Contact Service Department
(B)
The pump cannot
reach stated vacuum
Discharge clogged Check couplings at outlet
Air exhaust filter clogged Change the air exhaust filter
Bearings damaged Contact Service Department
Solid particles in the oil Change oil
Vanes worn out Contact Service Department
(C)
Pump is noisy
Motor coupling damaged
(where present)
Contact Service Department
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
(D)
Pump runs hot
Discharge clogged Check couplings at outlet
High working pressure
(close to atmospheric pressure)
Check oil level frequently
Pump runs hot See point “D”
(E)
High oil consumption
Air exhaust filter clogged Change the air exhaust filter
(F)
Pump does not
maintain vacuum after
power-off
Check valve damage Contact Service Department
Tank screws, oil drain valve or plugs loosened Tighten screws, valve or plugs
Tank gaskets damaged Contact Service Department
(G)
Pump leaks oil
Oil sight glass not tightened Tighten the oil sight glass