(Remote only)
If a leak is detected, the following LED icon will display:
Table 34 - LED icons (Leak detect)
Status
4-20 mA
Running
Remote stop
Change
pumphead
4-20 mA
signal
Error
warning
Pumphead
requires
changing
On
Follow the instructions in "Pumphead Replacement (qdos 30)" on page 131 "Pumphead
Replacement (qdos 20, 60, 120 and CWT)" on page 139 to replace your pumphead.
If this message is repeated when power is cycled, or after the reset button has been
pressed, remove the pumphead, check that the mounting face is clean and free of debris
and refit the pumphead, taking care to ensure it is correctly orientated with the arrow
pointing upwards.
If the message constantly repeats after several pumphead installations, then there may be
a leak detection sensor failure.
If the leak detector is faulty, please contact your local Watson- Marlow representative
before using the pump with chemical.
26.2
Pumphead Alert (qdos20 and qdos60, ReNu 20 PU and
ReNu 60 PU only)
The qdos20 and qdos60 has ‘pumphead management software’ to stop the pumphead
shortly before the end of life of the consumable. This software is in place in order to
monitor the pumps life and to prevent tube failures. On start up please select the PU option
when asked, or navigate to the control panel in order to select this option.
When the PU pumphead expires a ‘PUMPHEAD ALERT’ screen will be displayed.
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