JUMO MAERA S29 SW, Installation Instructions Manual, Page: 63 / 118

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7 Malfunctions/faults
7 Malfunctions/faults
DANGER!
Medium residue may cause damage to humans, the environment, and equipment!
CAUTION!
Irreparable damage occurs if the membrane comes into contact with sharp or hard objects!
Type of fault Possible causes Measures
No measuring and/or output
signal Voltage supply is too low Check the voltage supply,
 chapter 5 "Technical data", page 19
Open circuit, incorrect connection Check connecting cables
 chapter 5 "Technical data", page 19
Mechanical, thermal, or chemical dam-
age of the level probe Send the device with the fault description
and declaration of decontamination to the
suppliers
Constant output signal even
with changes in pressure Measuring system destroyed by excess
pressure Send the device with the fault description
and declaration of decontamination to the
suppliers
Output signal is distorted as a result of
excess pressure due to current limiting Check voltage supply,
 chapter 5 "Technical data", page 19
Output signal is too high Measuring range selected is too small Send the device with the fault description
and declaration of decontamination to the
suppliers
Electrics are faulty
Voltage supply is too high
Output signal is too low For current output signal:
Burden is too high Change the burden,
 chapter 5 "Technical data", page 19
Voltage supply is too low Change the voltage supply,
 chapter 5 "Technical data", page 19
Membrane damaged by mechanical in-
fluences, an aggressive medium, or cor-
rosion, for example Send the device with the fault description
and declaration of decontamination to the
suppliers
Varying
zero point signal Medium and/or ambient temperature is
too high or too low Send the device with the fault description
and declaration of decontamination to the
suppliers
Membrane contaminated Carefully clean the membrane using a soft
brush or sponge with a non-aggressive
cleaning agent, for example,
 chapter 6.2 "Maintenance", page 22
Membrane damaged by mechanical in-
fluences, an aggressive medium, or cor-
rosion, for example Send the device with the fault description
and declaration of decontamination to the
suppliers
Moisture entered the device
Characteristic line of the out-
put signal is not linear Device altered by inadmissible operating
conditions (such as excess pressure) Send the device with the fault description
and declaration of decontamination to the
suppliers