Malfunctions And Faults - JUMO NESOS Manual De Servicio

8

Malfunctions and faults

8.1 Malfunctions and faults
If it is not possible to rectify the malfunctions below, the product must be taken out of operation immedi-
ately and the manufacturer must be contacted. See the instructions regarding returns under
chapter 8.2 "Dismounting and return", Page 20.
Type of fault
Installation not possible
Switching function of float switch
faulty
Temperature signal faulty
Output signal of level transmitter
faulty
8 Malfunctions and faults
Possible cause
Process connection dimensions
incorrect
Process connection at tank dam-
aged
Process connection at product
damaged
Guide tube too long or dimen-
sions incorrect
Electrical connection faulty
Reed contact faulty
Temperature contact/sensor
faulty
Operation outside permissible
limits
Contamination or deposits on the
product
Float faulty
(corrosion, overpressure)
Temperature sensor faulty
Cable break or short circuit
Reed chain fault,
output signal according to
NAMUR NE43
(≤ 3.6 mA or ≥ 21 mA)
Electrical connection faulty
Contamination or deposits on the
product
Float faulty (corrosion, overpres-
sure)
Electrical fault due to overvoltage
(e.g. thunderbolt)
Measure
Contact the manufacturer
Change connection to tank or
container
Reworking of the thread
Installation of new process con-
nection
Return to manufacturer
Contact the manufacturer
Check terminal assignment and
startup according to
chapter 6.1 "Electrical connec-
tion", Page 14
Return to manufacturer
Return to manufacturer
Check and comparison of the op-
erating conditions with the re-
spective applicable technical
data of the product
Carry out cleaning according to
chapter 7 "Operation and Clean-
ing", Page 18
Exchange or return
Return to manufacturer
Check of the entire measuring
circuit; return to manufacturer in
event of faults
Return to manufacturer
Check terminal assignment and
startup according to
chapter 6 "Installation", Page 14,
taking the entire measuring cir-
cuit into consideration
Carry out cleaning according to
chapter 7 "Operation and Clean-
ing", Page 18
Exchange or return to manufac-
turer
Return to manufacturer
19