Burkert Type 8741 - Manual (Page 35)

35
Devicestatus/Troubleshooting
Type 8741
11.2 Troubleshooting
problem possible cause What to do?
The Namur LED goes out
periodically The power supply is intermittently dropping - the
device therefore performs a reset. Use a power supply with sufficient power output.
The voltage drop in the connecting cable is too
large. Increase the cross-section of the cable.
Reduce the cable length.
The exchange device adopts
none of the values on the
micro SIM card from the faulty
device The ID number of the exchange device differs
from that of the defective device. Values can only be transferred between devices with the same ID number.
Micro SIM card is faulty - Device could not write
any values to the micro SIM card. Replace the micro SIM card (see accessories) and search again for the
settings of the defective device to transfer to the card (see section "9.5.1
Exchanging the micro SIM card").
The exchange device does not
adopt all of the values on the
micro SIM card from the faulty
device The EDS device description of the exchange
device differs from that of the defective device. Only the existing values of the defective device can be adopted by the
exchange device. The new values of the exchange device must be con-
figured using the "Bürkert Communicator" software.
MFM/MFC does not adopt
the values of an assigned büS
peer The value to be adopted is not properly assigned
in the MFM/MFC. Assign the value to be adopted in the device using the "Bürkert Communi-
cator" software.
The value to be adopted is not supplied from the
assigned büS peer. Assign the value to be adopted in the assigned büS peers using the
"Bürkert Communicator" software.
The assigned büS peer is defective. Replace the instrument of the assigned büS peer.
No mass flow rate The setpoint is below the zero-point shut-off
limit. Increase the setpoint value to > 2% of the nominal flow rate.
The device is not in the normal control mode.
See section "9.2 Normal control mode". Check whether the device is running one of the functions described in
section "9.6".
The pipes are too large or not yet fully vented. Vent the pipes.
Change the pipe diameter.
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