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Malfunctions and troubleshooting
Fault description
No metering
Pump metering too little
Metering pump does not work
No suction by pump
Pump head is leaking, medium
comes out through the diaphragm
rupture drain
MAN053089 Rev. 1-11.2023
Cause
Back-pressure too high
Valve on pressure side
closed
Motor overheated/defective
Suction tube leaking
Back-pressure too high
Mains cable damaged
Wrong voltage
Sediment, sticking of valves
Cross section of suction or
pressure lines too large.
(especially for 20 l/h version)
Pump head is loose
Diaphragm torn
74
Remedy
Ä More information on: Diaphragm metering
pump TCD Turbo Pump
Open valve on pressure side
Ä More information on: Diaphragm metering
pump TCD Turbo Pump
Allow motor to cool or replace pump
Ä More information on: Diaphragm metering
pump TCD Turbo Pump
Check suction line
Ä More information on: Diaphragm metering
pump TCD Turbo Pump
Check back-pressure
Ä More information on: Diaphragm metering
pump TCD Turbo Pump
Change mains cable
Ä More information on: Diaphragm metering
pump TCD Turbo Pump
Ensure actuation
Ä More information on: Diaphragm metering
pump TCD Turbo Pump
Flush out pump head via suction line; if
necessary, remove valves and clean/replace
them
Ä More information on: Diaphragm metering
pump TCD Turbo Pump
Use smaller hose sizes. (e.g. 6/12 mm with 20
l/h version)
Ä More information on: Diaphragm metering
pump TCD Turbo Pump
Diagonally tighten the pump head fastening
screws
Ä More information on: Diaphragm metering
pump TCD Turbo Pump
Replace pump
Ä More information on: Diaphragm metering
pump TCD Turbo Pump
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