Diagnose A Fault; Pump Does Not Start Up; Pump Gets Too Hot - Edwards EDS 200 Instruction Manual

11. Diagnose a fault

A list of fault conditions and their possible causes is provided here to assist in basic
troubleshooting. If you are unable to rectify 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 defective.
Remedy Contact Edwards Service.
Cause Pressure switch is defective.
Remedy Replace the pressure switch.
Cause Lubricant is too thick.
Remedy Exchange the lubricant or warm up lubricant and pump.
Cause Motor rotor defective.
Remedy Contact Edwards Service.
Cause Pump has seized: defective rotors, bearings or toothed gears.
Remedy Contact Edwards Service.
Fault

Pump gets too hot

Cause Cooling-water supply is not sufficient.
Remedy Ensure sufficient cooling-water supply.
Cause Cooling-water lines are clogged.
Remedy Decalcify cooling-water lines.
Cause Ambient temperature is too high or cooling air flow is obstructed.
Remedy Install the pump at a suitable place or ensure a sufficient flow of cooling air.
Cause Pump is operating 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 contamination.
Remedy Clean pumping chamber.
Cause Clearance between housing and rotors are too small due to distortion of the pump.
Affix and connect the pump free of tension.
Remedy
A41802880_C - Diagnose a fault
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