Watson-Marlow 120U IP31 pumps: operating instructions 14
2.7 Troubleshooting
If the pump fails to operate, make the following
checks:
Check that the dedicated external DC power
supply unit is plugged into a working mains
power source which is switched on. Check that
the power supply unit’s LED is illuminated (if
fitted).
Check that the dedicated external DC power
supply unit’s output connector is plugged into
the pump.
If the pump runs but there is little or no flow, make
the following checks:
Check that tubing is installed in the pumphead;
check that it is the correct wall thickness:
1.6mm. See section 3 of these instructions.
Check that the tube is not split or burst.
Check for any kinks or blockages in the lines.
Check that any valves in the lines are open.
Check that the rotor is in the pumphead, that
it rotates and that the rollers are in good
condition.
Check that fluid is supplied to the pump.
Error
code
Error condition Suggested action
Er 0 FRAM write error Attempt to reset by switching power OFF / ON. Or seek support
Er 1 FRAM corruption Attempt to reset by switching power OFF / ON. Or seek support
Er 2
FLASH write error
during drive update
Attempt to reset by switching power OFF / ON. Or seek support
Er 3 FLASH corruption Attempt to reset by switching power OFF / ON. Or seek support
Er 4 FRAM shadow error Attempt to reset by switching power OFF / ON. Or seek support
Er 9 Motor stalled
Stop pump immediately. Check pumphead and tube. Power OFF/ON
may reset. Or seek support
Er10 Tacho fault Stop pump immediately. Power OFF/ON may reset. Or seek support
Er14 Speed error Stop pump immediately. Power OFF/ON may reset. Or seek support
Er15 Over current
Stop pump immediately. Check system. Power OFF/ON may reset.
Or seek support
Er16 Over voltage
Stop pump immediately. Check mains voltage selector switch. Check
supply. OFF/ON may reset. Or seek support
Er17 Under voltage
Stop pump immediately. Check mains voltage selector switch. Check
supply. OFF/ON may reset. Or seek support
Er19 Over temperature Stop pump immediately. Turn OFF. Seek support
Er20 Signal out of range
Check analogue control signal range. Trim signal as required. Or
seek support
Er21 Over signal Reduce the analogue control signal
Er30 Over power
Turn OFF. Check power supply. Check pumphead and tubing. Wait
30 minutes. Power ON may reset. Or seek support
Err General error condition Turn OFF. Seek support
2.7.1 Error codes
If an internal error occurs, an error screen is
displayed.
Note: Signal out of range and Over signal
report the nature of an external signal.
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