Troubleshooting - LEYBOLD TRIVAC D 2,5 E-LD Operating Instructions Manual

6

Troubleshooting

Fault
Pump does not start.
Pump does not reach ultimate
pressure.
Pumping speed is too low.
After switching off the pump
under vacuum, pressure in the
system rises too fast.
* Repair: Refer to the stated section in these Operating Instructions.
Bubble test: The warm pump with degassed oil is running without gas ballast and the intake is blanked off. The exhaust line is
1)
led into a vessel with water.
If an evenly spaced line of bubbles appears then the pump has an external leak.
Possible cause
Wiring is malfunctioning.
Power supply voltage does not
match the rating of the motor.
Motor is malfunctioning.
Oil temperature is below 10 °C.
Oil is too thick.
Exhaust filter/exhaust line is
clogged.
Pump is seized up
(sign: pump is jammed).
Measuring technique or gauge is
unsuitable.
External leak .
1)
Dirty internal demister
Exhaust valve is malfunctioning.
Oil is unsuitable.
Intake line dirty or leaky.
Pump is too small.
Clogged exhaust filter.
Connecting lines are too narrow or
too long.
System has a leak.
Faulty tandem valve.
Inner shaft seal is faulty.
Faulty exhaust or bypass valve.
Troubleshooting
Remedy
Check and repair wiring
Replace the motor.
Replace the motor.
Heat the pump and pump oil or use
a different oil.
Change the oil.
Replace the filter or clean the exhaust
line.
Repair the pump.
Use correct measuring technique and
gauge. Measure the pressure directly
at the pump's intake port.
Repair the pump.
Perform maintenance
Repair the valve.
Change the oil (degas it, if necessary).
Clean or exchange the intake line.
Check the process data, replace the
pump, if necessary.
Exchange the filter element.
Use adequately wide and short
connecting lines.
Check the system.
Repair the valve.
exchange theshaft seal.
Repair the valve(s).
GA01601_002_C1 - 03/2018 - © Leybold
Repair*
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5.6
5.6
4.3.3/5.4
5.4
-
Service
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Service
M. Kit 1 / 2.3.5
M. Kit 2
5.4
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-
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3.3
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Compl. Set
KCompl. Set
M. Kit 2
35