DEKKER Vacuum Technologies, Inc. – Vmax/July 2016
System shuts down while running: (Vmax)
1. Check oil temperature on the DEKKER Controller for operating temperature, refer to page 13.
2. Check the overload setting on the starter and fuses.
3. Ensure that the proper voltage is supplied and that the wire size is correct.
4. Check for loose electrical connections.
5. Check the vacuum setpoints, refer to page 17.
6. Check low oil level switch (if installed), add oil to reservoir if needed.
7. Check if the pump has seized by rotating the coupling by hand (disconnect power first). If a rubbing
noise or binding is observed, contact authorized dealer.
8. Check high temperature setting on the DEKKER Controller Program Menu, which should be set for 225
o
F,
refer to page 13.
9. Clean oil strainer.
10. Check if pump operates against high back pressure (> 4 psig), if so replace oil separator element.
11. Check the small auxiliary contactor on the face of the main contactor. A loose connection or debris can cause
faulty operation. Remove, clean, and reattach. Tighten wires.
12. If a remote start switch is installed; remove the switch, re-install the jumper on terminal 27, and disable
the System Option.
Vacuum Problems:
System operates, but does not achieve desired vacuum level: (Vmax)
1. Stop system and disconnect power.
2. Check if the inlet valve is open and inlet filter is clean.
3. Ensure that no lines are open to the atmosphere, causing loss of vacuum.
4. Check for leaks in piping systems, using conventional leak detection methods.
5. Ensure that the oil level is correct and that the pump is primed and filled with oil to the shaft centerline only.
6. Check if the oil isolation valve is open.
7. Check if the oil solenoid valve (if installed) is working.
8. Check the vacuum setpoints, refer to page 17.
9. Check setting of vacuum relief valve (if installed) and adjust as needed.
10. Check if the motor rotation is correct. Rotation should be clockwise (facing pump from motor side)
and marked by an 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.
Overheating Problems:
System overheats or operates above 200
o
F: (Vmax)
1. Stop system and disconnect power.
2. Check the oil cooler and fan. Clean cooler externally with compressed air. Ensure that 12" of space is
available in front of the cooler and that the ambient temperature is below 110° F.
3. Check if the oil isolation valve is open.
4. Check if the oil solenoid valve (if installed) is working.
5. Ensure that the oil level is correct and that the pump is primed and filled with oil to the shaft centerline only.
6. Check if the temperature control valve (if installed) is working and that oil is flowing through the cooler.
Caution, the oil will be HOT!
7. Clean oil strainer.
8. Check if oil cooler is blocked internally with solids passed through from the process, clean if necessary.
Unit overheats on start-up in low ambient temperatures: (Vmax)
1. Stop system and disconnect power
2. Oil tends to thicken in temperatures of 45°F and below. Place heat tape and insulation on the fluid seal
line from the heat- exchanger to the pump inlet.
3. Also insulate the seal-fluid solenoid valve (if installed) or change oil to synthetic fluid contact local dealer
of factory for more information.
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