1. Switch off the pump and disconnect from the electrical supply.
2. Use a dry cloth and a soft brush to remove dirt and deposits on the fan
cover.
7.5 Replace the pump bearings
The service indicator, (ashing ON 3 sec/OFF 1 sec) is activated to indicate
that a bearing replacement service interval has been reached. Bearing wear
cannot always be detected under normal operating conditions. This service
interval is a recommendation that a bearing replacement is required and is
useful in the preventative maintenance plan.
Note:
Failure to replace the pump bearings on time can damage the pumping
mechanism.
To reset the service indicator, refer to Table: Service indicator codes.
Bearing replacement is not possible by the customer, the pump must be
returned to a Service Technology Centre for maintenance.
7.6 Replace the pump controller
The service indicator, (ashing ON 3s / OFF 3s) is activated to indicate that
the pump controller must be replaced. Contact us for further details.
To reset the service indicator, refer to Table: Service indicator codes.
Controller replacement is not possible by the customer, the pump must be
returned to a Service Technology Centre for maintenance.
7.7 Electrical safety check
Test the earth continuity and the insulation resistance of the pump system in
accordance with local regulations for the periodic test of electrical
equipment.
The earth continuity must be less than 0.1 Ω and the DC insulation
resistance greater than 1.0 MEG Ω. If the pump fails any of these tests,
contact us or the supplier.
7.8 Service indicator codes
The controller has a service indicator, refer to Figure: Interface control panel.
The service indicator will ash a specic code whenever a service interval is
reached. See Table: Service indicator codes for service levels.
Table 20 Service indicator codes
Service ash code Comments
ON 3s/OFF 1s Pump bearing service
ON 3s/OFF 3s Pump controller service
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300902516_002 - 10/2020 - © Leybold
Maintenance and service
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