© Edwards Limited 2015. All rights reserved. Page 27
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Maintenance
A352-03-880 Issue B
5.8 Clean the motor fan cover
Keep the motor fan cover clean. The pump may overheat if the air flow over the motor is restricted.
1. Isolate the pump from the electrical supply.
2. Use a dry cloth and a brush to remove dirt and deposits from the fan cover.
3. Reconnect the electrical supply to the pump.
5.9 Clean and overhaul the pump - (part of major service)
Clean and overhaul the pump as described in the instructions supplied with the major service kit (Table 12).
5.10 Test the motor condition
Test the earth continuity and the insulation resistance of the pump motor in accordance with local regulations for
periodic testing of electrical equipment. Edwards recommends that the earth continuity is less than 0.1 ohm and the
insulation resistance is greater than 10 Mohm. If the motor fails these tests, replace the motor.
5.11 Fit new blades - (part of major service)
Fit new blades to the pump as described in the instructions supplied with the major service kit (Table 12).
5.12 Basic fault finding
A list of fault conditions and their possible causes is provided here to assist in fault finding. If unable to rectify a fault
when using this guide, call the nearest Edwards Service Centre for help.
5.12.1 The pump has failed to start
The electrical supply fuse is blown.
The electrical supply voltage does not match the motor.
The outlet pipeline or the outlet filter (if fitted) is blocked.
The oil temperature is below 12 ºC.
The oil is too viscous.
The oil is contaminated.
The pump has seized after long storage or lack of oil.
The pump has been left to stand after contaminants have been pumped and has seized.
The motor is faulty.
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