Burkert Type 8741 - Manual (Page 33)

33
Devicestatus/Troubleshooting
Type 8741
led acc. to ne 107 description What to do?
Red / Lit Mode 4: communication with other büS peers is
impossible. Connect the device in a network with other peers.
Mode 5:
Supply voltage is 20% under or above the nominal value. Check the power supply.
Red / Flashing Mode 1: Bus error (e.g. short-circuit). Check the wiring. Exception: SETPOINT SOURCE set to STORED
SETPOINT .
Mode 2:
Supply voltage is 20% under or above the nominal value. Check the power supply.
Mode 3: the device cannot find the assigned büS peer. Make sure the büS peer is affected to the device.
Exception:
SETPOINT SOURCE set to STORED SETPOINT
Orange / Lit Mode 1: The medium temperature or the device tempe-
rature is outside the specifications: potential destruction
of the sensor or the device. Operate the device within the specifications.
Mode 2:
The control variable for the proportional valve has (almost)
reached 100%. The setpoint cannot be reached. Increase the operating pressure (observe the maximum permissible
supply pressure).
Check the pressure drop in the pipe and reduce it if necessary.
Check the dimensions of the installation.
Check the filters installed in the pipe and clean them if necessary.
Mode 3 :
The device has detected an error in the büS fieldbus. If this mode persists for more than 5 seconds, restart the network.
Mode 5 :
Supply voltage is 10% under or above the nominal value. Check the power supply.
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