Metrohm 774 Oven Sample Processor - Manual (Page 143)

6.1 Error messages
774 Oven Sample Processor, Instructions for use 137
6 Appendix
6.1 Error messages
If an error occurs, execution of the active command is aborted and an error
message is displayed (display blinks). This must be confirmed with the
<QUIT> key.
If the changer was processing a sample series when the error occurred, it
then switches to 'HOLD' state. After the cause of the fault or error has been
remedied, the sample series can be continued by pressing key <START>
with the next command in the current sequence. If the fault or error cannot
be remedied, the current method can also be aborted with <STOP>.
List of the possible error messages and their causes:
∗ battery low The battery for non-volatile storage of the user data must be
replaced.
∗ changer low power The power supply unit is unable to supply adequate power
for all components currently switched on.
∗ changer not ready The changer is unable to execute the selected command
since it is busy executing another action or since the se-
lected position cannot be approached.
∗ changer overload Load too high or excessive mechanical resistance for per-
forming the selected action.
∗ Dos## ext. bus failure An unforeseen error or fault has occurred on a device (Do-
simat or Dosino) connected to the external bus.
∗ Dos## command not exec An error has occurred on the specified dosing unit.
∗ Dos## no exchange unit The related change unit is missing for the specified dosing
unit.
∗ Dos.## not ready The selected dosing unit is unable to execute the selected
command since it is busy executing another action or since
the current device status does not allow this.
∗ Dos.unit ## missing The selected doser is not connected.
∗ Dos.unit ## overload The specified dosing unit is unable to execute a dosing
command. Check the burette and plunger.
∗ error list full More than 10 error messages have occurred. Check the unit.
Switch the unit off and back again if necessary. Restart the
sample series.