Troubleshooting Guide - Thermo Scientific Wellwash Versa User Manual

Troubleshooting
Symptom
Dispensing volume is
too low or residual
volume is too high.
Dispensing volume is
too low.
Volume is too low.
Wrong volume is
dispensed.
Continued
Thermo Fisher Scientific
The multiple drive USB memory devices normally contain one or more
removable disk-type memory spaces, but can also contain virtual CD
drive-type memory spaces. The Wellwash Versa does not support
virtual CD drive-type memory spaces.
It is possible to check if there is a virtual CD drive present when
inserting a multiple drive USB memory device into the PC USB port.
1. Select My Computer and note the new drives that appear in the list
when the multiple drive USB memory device is inserted.
2. Check all the appearing items by using the right-click mouse menu
and selecting Properties.
3. The item type "Removable Disk" is stated for the USB memory
device in the General sheet. It is compatible with the Wellwash
Versa if the File system is FAT16 or FAT32.
4. If the item is a virtual CD drive, then the type will be "CD Drive".
This may cause the USB memory device to be incompatible with
the Wellwash Versa.
The problems covered below are considered faults that require repair or
corrective work (Table 13–14). If problems occur or reoccur, contact
guide
authorized technical service immediately.
Table 13–14. Troubleshooting guide
Description
Tubing is old or clogged.
Wash head tips are blocked.
Too high an aspiration position.
Filter is blocked.
The selector valve is not functioning
properly.
Tips are deformed.
Leakage in tubing.
Dispensing valve is leaking when closed.
Wash head is incorrectly aligned.
Improper liquid calibration.
Underpressure in the bottle.
Too low maximum well volume has been
defined.
Pump characteristics have changed.
Suggested action
Use Maintenance > Clean > Soak wash head.
Clean or replace the tubing.
Clean the wash head tips with the declogging tool.
Replace the wash head.
Define the correct aspirate height.
Calibrate the wash head.
Clean the liquid filters in the bottles.
Component failure. Contact authorized technical
service.
Change the wash head.
Clean or replace the tubing.
Component failure. Contact authorized technical
service.
Check that the wash head is properly fitted.
Calibrate the wash head.
Do not cover the venting holes in the liquid bottle
caps.
Check the step parameter and adjust it.
Calibrate the dispensing pump speed.
Component failure or wear. Contact authorized
technical service.
Thermo Scientific Wellwash Versa User Manual

Troubleshooting Guide

Troubleshooting guide
135