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
