Edwards EDS 300

11. Diagnose a fault
A list of fault condions and their possible causes is provided here to assist in basic
troubleshoong. If you are unable to recfy a fault using this guide, call your supplier or your
nearest Edwards Service Centre for advice.
Fault Pump does not start up
Cause Motor incorrectly connected.
Remedy Connect motor correctly.
Cause Overtemperature switch or motor stator defecve.
Remedy Contact Edwards Service.
Cause Pressure switch is defecve.
Remedy Replace the pressure switch.
Cause Lubricant is too thick.
Remedy Exchange the lubricant or warm up lubricant and pump.
Cause Motor rotor defecve.
Remedy Contact Edwards Service.
Cause Pump has seized: defecve rotors, bearings or toothed gears.
Remedy Contact Edwards Service.
Fault
Pump gets too hot
Cause Cooling-water supply is not sucient.
Remedy Ensure sucient cooling-water supply.
Cause Cooling-water lines are clogged.
Remedy Decalcify cooling-water lines.
Cause Ambient temperature is too high or cooling air ow is obstructed.
Remedy Install the pump at a suitable place or ensure a sucient ow of cooling air.
Cause Pump is operang in the wrong pressure range.
Remedy Check the pressure levels within the system.
Cause Gas temperature is too high.
Remedy Check system.
Cause Clearance between housing and rotors are too small due to contaminaon.
Remedy Clean pumping chamber.
Cause Clearance between housing and rotors are too small due to distoron of the pump.
Remedy
Ax and connect the pump free of tension.
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A41802880_C - Diagnose a fault