Edwards nXR60i - Clean the External Fan Grill; Replace the Pump Bearings; Replace the Pump Controller; Electrical Safety Check

7.4 Clean the external fan grill
If the f
an cover is not kept clean, the air ow over the pump can be restricted and the
pump may overheat.
To clean the fan grill:
1. Switch o the pump and disconnect from the electrical supply.
2. Use a dry cloth and a so 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 acvated to indicate that a bearing
replacement service interval has been reached. Bearing wear cannot always be detected
under normal operang condions. This service interval is a recommendaon that a
bearing replacement is required and is useful in the preventave maintenance plan.
Note:
F
ailure to replace the pump bearings on me 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 acvated 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 connuity and the insulaon resistance of the pump system in accordance
with local regulaons for the periodic test of electrical equipment.
The earth connuity must be less than 0.1 Ω and the DC insulaon resistance greater
than 1.0 MΩ. If the pump fails any of these tests, contact us or the supplier.
7.8 Service indicator codes
The nXRi controller has a service indicator, refer to Figure: Interface control panel. The
service indicator will ash a specic code whenever a service interval is reached. See
Table: Service indicator codes for service levels.
Table 16 Service indicator codes
Service ash c
ode Comments
ON 3s/OFF 1s Pump bearing service
ON 3s/OFF 3s Pump controller service
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A90301880_C - Maintenance and service