A371-32-880 Issue C
Page 22 © Edwards Limited 2007. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Maintenance
Figure 4 – Gas-ballast o-ring removal and replacement
5.7 Clean the motor fan-cover and enclosure
If the motor fan-cover and enclosure are not kept clean, the air-flow over the motor can be restricted and the pump
may overheat.
1. Switch off the pump and disconnect it from the electrical supply.
2. Use a dry cloth and a soft brush to remove dirt and deposits from the fan-cover and enclosure.
5.8 Clean and overhaul the pump
Clean and overhaul the pump as described in the instruction supplied with the clean and overhaul kit (see Section 7).
5.9 Fit new blades
Fit new blades to the pump as described in the instructions supplied with the blade kit (see Section 7).
5.10 Test the motor condition
Test the earth (ground) continuity and the insulation resistance of the pump-motor, in accordance with local
regulations for periodic testing of electrical equipment. We recommend that the earth (ground) continuity is less
than 0.1Ω and the insulation resistance is greater than 10M Ω. If the motor fails these tests, you must replace the
motor.
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