Fault Finding; Pump Faults And Remedies - Edwards EOSi Series Instruction Manual

10. Fault finding

WARNING: HIGH VOLTAGE
Risk of injury or damage to equipment. Wait for 10 minutes before you start electrical
repairs as dangerous high voltage remains on the capacitors of the start and speed
regulation unit for several minutes after you set the voltage to off.
Before you do maintenance, repair work or adjustment, stop the pump. Close the
isolation valve and wait for 3 minutes.
The operator must obey all relevant safety precautions.
Push the emergency stop button and set the voltage to off.
Vent the pump by opening the plug on the cover of the air inlet filter. For location of
components, refer to:
Installation
Operation
Maintenance
Open and lock the isolating switch.
Lock the air inlet valve during the maintenance and repair.

10.1 Pump faults and remedies

If the alarm LED is lit or flashes, refer to
on page 37.
Table 24 Fault finding
Condition
The pump cannot reach ultimate pressure
The pump cannot reach stated vacuum
Pressure switch trips
Pump element outlet temperature above normal
Fault The pump cannot reach ultimate pressure
Cause Air leakage in the inlet piping connections
Remedy Examine the inlet filter assembly and pipes for leaks.
Check the seals between components.
Cause Low oil level
Remedy Fill the oil.
Cause Oil contaminated
Remedy Replace the oil.
6996022910_B
6996022910_B - Fault finding
on page 74
on page 96
on page 100
on page 112
Event history menu
on page 111
on page 112
on page 113
Page 111
on page 44 or Service menu
09/2021 - ©Edwards Limited