LEYBOLD 960702FP, Original Operating Instructions

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300419816_002_C1 - 11/2016 - © Leybold
Troubleshooting
6 Troubleshootin
Fault Possible cause Remedy
Reference
section
*
Pump does not start Pump is connected incorrectly
Motor protection switch incorrectly set.
Operating voltage does not match motor
Motor is malfunctioning
Oil temperature is below 12°C (54°F)
Oil is too viscous
Exhaust filter / exhaust line is clogged
Pump is seized up (sign : pump is jammed) Connect the pump correctly
Set motor protection switch properly
Replace the motor
Replace the motor
Heat the pump and pump oil or use different oil
Use appropriate oil grade
Replace the filter or clean the exhaust line
Repair the pump 3.4
3.4
2
5.4
5.10
Pump does not reach
ultimate pressure Measuring technique or gauge is unsuitable
External leak 1) - Piping fittings loose
Float valve does not close
Anti-suck back valve is malfunctioning
Exhaust valve is malfunctioning
Inadequate lubrication due to :
- unsuitable or contaminated oil
- clogged oil filter
- clogged oil lines
Vacuum lines are dirty
Pump is too small Use correct measuring technique and gauge
Repair the pump - Retighten
Repair the valve
Repair the valve
Repair the valve
Change the oil
Replace the oil filter
Clean the oil lines and oil case
Clean vacuum lines
Check the process date ; replace the pump, if
necessary 4.5
5.6
5.4
5.4
Pumping speed is too
low Dirt trap in the intake port is clogged
Exhaust filter is clogged
Connecting lines are too narrow or too long
Anti-suck back valve is hard to open Clean the dirt trap.
Precaution : install a dust filter in intake line
Install new filter elements
Use adequately wide and short connecting lines
Check spring free length 5.5/1.5/3.3
5.10
3.3
After switching off
pump under vacuum,
pressure in system
rises too fast System has a leak
Anti-suck back is malfunctioning Check the system
Repair the valve
5.6
Pump gets too hot Cooling air supply is obstructed
Cooler is dirty
Ambient temperature is too high
Process gas is too hot
Oil level is too low
Oil is unsuitable
Oil cycle is obstructed
Exhaust filter / exhaust line is obstructed
Exhaust valve is malfunctioning
Pump module is no longer usable Set pump up correctly
Clean the cooler
Set pump up correctly
Change the process
Add oil to reach the correct oil level
Change the oil
Clean or repair the oil lines
Replace the exhaust filter, clean the exhaust line
Repair the valve
Replace the pump module 3.1
5.9
3.1
5.4
5.4
5.10