LEYBOLD SCROLLVAC plus - Clean the External Fan Cover; Check the Pump Performance; Replace the Tip-Seals; Replace the Pump Bearings

9.4Clean the external fan cover
If the fan cover is not kept clean, the air ow over the pump can be
restricted and the pump may overheat.
1. Switch off the pump and disconnect it from the electrical supply.1.
2. Use a dry cloth and a soft brush to remove dirt and deposits from the2.
fan cover.
9.5Check the pump performance
If the service indicator for 1-phase pumps is ashing ON 1s / Off 1s or the
hours counter on the 3-phase pump has reached the recommended running
hours as detailed in  on page 57, then it is recommended
that the performance of the pump is checked.
If after checking, the pump is no longer achieving the required performance
as detailed in
 , We recommend carrying out
a tip-seal replacement, refer to
 on page 58.
If the pump performance is within acceptable limits, or is performing
satisfactorily, the tip‑seal replacement can be delayed.
If operating a preventative maintenance plan, depending upon the particular
regime, a tip‑seal change can be carried out at this time irrespective of the
pump performance.
To reset the 1-phase service indicator, refer to


on page 60.
9.6Replace the tip-seals
This information is applicable to the pump replacement tip seal kit that must
be tted.
A tip-seal replacement should be carried out to maintain or restore the
pumps performance. The frequency for replacing the pump tip‑seals is
determine by the following factors:
▪ The pump has reached a service interval. Refer to (
▪
on page 57 and
 on page 58).
▪ The pump is no longer achieving the required performance.▪
If the pump is no longer achieving the required performance prior to a
service interval being reached We recommend rst following the Fault
nding, (
 on
page 64).
Note:

‑‑

‑

9.7Replace the pump bearings
If the service indicator for 1-phase pumps is ashing ON 3 s/Off 1 s or
the hours counter on the 3-phase pump has reached the recommended
running hours as detailed in
 on page 57, then this is an
indication that a bearing replacement service interval has been reached.
Bearing wear cannot necessarily be detected under normal operating
conditions. This service interval is a recommendation that a bearing
58 300668736_002_C7 - © Leybold
Maintenance