Specifications

Dekker Vacuum Technologies, Inc. – DuraVane/12 18
TROUBLESHOOTING
Following below is a basic troubleshooting guide. We recommend that you consult your local dealer for
service. Each DuraVane rotary vane vacuum pump unit is tested and checked at the factory. Always
indicate unit model and serial number when calling.
WARNING: Before attempting any repairs, disconnect all power from the unit by switching off
the main breaker or disconnect switch. This will prevent the unit from automatically starting
from a vacuum switch.
TROUBLE SHOOTING FAQS (Frequently Asked Questions)
DURAVANE LUBRICATED ROTARY VANE VACUUM PUMPS AND SYSTEMS
START-STOP PROBLEMS:
The unit will not start: (DuraVane Lubricated)
1. Check reset button on control panel (if installed). Overloads may have been triggered.
2. Check setting of HOA switch and vacuum switches.
3. Check power. Make sure that supply voltage matches motor voltage.
4. To check electrical control panel (if installed) disconnect power. Make sure that all wires are tight. Wires
may vibrate loose during shipment or operation. See wiring diagram on conduit box of motor for correct
wiring configurations.
5. Check motor overload in control panel (if installed). Overload settings may be too low. Set overload setting
in motor starter in accordance with the motor nameplate data (include Service Factor).
6. Check fuses. Fuses may have blown.
7. Check motor wires. Motor may be wired incorrectly. Look at motor wiring diagram on conduit box of motor
for correct wiring configurations. Make sure connections are secure.
8. Check wire size and length. Incorrectly sized wires can cause a voltage drop at the pump. If temperature of
wire is high, use larger wire size.
Unit starts, but labors and draws a very high current: (DuraVane Lubricated)
1. Stop unit and disconnect power.
2. Check motor wires. Motor may be wired incorrectly. Look at motor wiring diagram on conduit box of motor
for correct wiring configurations. Make sure connections are secure.
3. Check if motor rotation is correct by comparing it to the arrow on the motor or pump housing. If incorrect
switch any two of the three main power leads on the contactor inside the control panel (3-phase only).
4. Check back-pressure on pump. Exhaust element may need to be replaced. Refer to Installation and
Operations manual for maximum pressure and replacement instructions.
5. Check power supply. Excessively high or low voltage or phase imbalance will damage motor.
6. Check to see if pump is overfilled with oil. Oil level should be in the middle of the sight glass on the side of
the pump reservoir
7. Check oil. Oil may be too heavy (high viscosity) or the ambient temperature is below 5
o
C (41
o
F). If oil is
too heavy, refer to the Installation and Operations manual and replace the oil with DEKKER’s
recommended Duratex oil.
8. Foreign particles may have carried over into pump causing damage to the vanes or other internal parts.
Contact authorized dealer.
9. Unit may have seized due to high temperature operation, causing oil to varnish. Contact authorized dealer.
VACUUM PROBLEMS
Unit is not drawing vacuum: (DuraVane Lubricated)
1. Stop unit and disconnect power.
2. Check if motor rotation is correct by comparing it to the arrow on the motor or pump housing. If incorrect
switch any two of the three main power leads on the contactor inside the control panel.
3. Check to see if the oil is contaminated or varnished. Replace at once.
4. Check hour meter (if installed). If the oil has been used longer than the recommended life expectancy (as
specified in the Maintenance Schedule in the Installation and Operations Manual), the pump will not draw
ultimate vacuum. Allow pump to cool before changing oil. Use specially formulated DEKKER Duratex oil.
5. Check vacuum gauge. Gauge may be faulty. Replace.
6. Check oil level. Oil level should be maintained at the middle of the top sight glass on the side of the pump
reservoir.
7. Check if the inlet valve is open and inlet filter (if installed) is clean.
8. Ensure that no lines are open to the atmosphere, causing loss of vacuum.
9. Check for leaks in the piping systems using conventional leak detection methods.
10. Check coupling between pump and motor (if applicable). If damaged, replace.