Markes International ACTI-VOC PLUS C-FFP-01, Instructions For Use Manual, Page: 18 / 24

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QUI-1164
pump will attempt an automatic re-start after 3 minutes. If the fault cause is
corrected during the time period the pump will resume sampling. After ten restart
attempts, the pump will end the sampling event. If fault retry is disabled, the
sampling event will end when the pump stops after 30 seconds of operation in fault
and no retry will be attempted.
■ To disable fault retry, use the navigation keys to select 'Setup' from the main
menu screen. From the 'Setup' menu use the adjustment keys to alter fault retry
from enable to disable before selecting.
Several conditions can initiate a fault condition, as described below:
■ Flow control fault (fault code FC): If the pump is running in the constant-flow
control mode, and the flow rate cannot be maintained within the constant-flow
rate specification, the pump will go into a 'flow fault', a fault caused by flow
outside the specifications of the pump.
■ Back-pressure fault (fault code BP): If the pump is running in the constant-flow
control mode and the sample media has increased in flow resistance ( i.e. ,
backpressure) due to the accumulated sample or a blockage in the sample train,
the pump will go into a fault condition after reaching its specified
backpressure maximum.
■ Over-pressure fault (fault code OP): If the pump is running in the constant-flow
control mode and the backpressure exceeds the maximum allowed for the
pump, an immediate fault condition and shutdown will occur. The pump will try a
restart if the fault retry option is enabled.
■ Pressure control fault (fault code PC): If the pump is running in the constant-
pressure mode and the sample backpressure cannot be maintained /-
10% of the set point pressure the pump will go into a pressure control fault
condition. This is usually caused by insufficient sample resistance, which causes
flow rates beyond the operating range of the pump.
■ Low battery fault (fault code LB): If the battery voltage has dropped below a
minimum level, the pump will go into a fault condition due to a low battery.
Restart attempts will not be made for this fault.
■
Recirculation valve fault (fault code RV): If the 'high flow/low flow' mode
control valve is not at the correct setting, either positioned between the high
and low settings or set at the incorrect setting for the flow rate selected the
pump will go into a recirculation valve fault. The correct 'high flow/low flow'
setting must be made to resolve the fault.