Symptom
Cause
Remedy
Bad vacuum
Gas ballast
● Check if the gas ballast is open. Warning: if the application re-
quires it, the gas ballast must remain open at the expense of the
limit pressure!
Purge (G and CV versions)
● If the purge is used: check the purge connection between pump
and installation.
● If the purge is not used: check the tightness of the plug installed
on the purge port.
Rotation speed
● If remote controlled via RS-485: check the setpoint speed.
● If remote controlled via dry contacts: check the contact setting.
Pumping of condensable va-
pors
● If the application allows it, let the pump run for 30 minutes to 1
hour with the gas ballast open; this removes the condensable va-
pors.
Defective measurement
gauge
● Perform a leak test on the pumping line.
Leak in the installation
● Check the accuracy of the measurement means
Other problem
●
Contact our service center.
Malfunctions
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Summary of Contents for ACP 28 CP
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