We have reviewed attachments and I found rate value of calibrator 1 were very high abnormally both #TSH and B-HCGII.
I suppose there are any problems in B/F wash, it might be the B/F wash could not aspirate waste clearly.
Please check following.
Confirm B/F wash works properly. Refer the Ch3.7.2 in the service manual.
If you find any problems, check connections related B/F lines and/or replace solenoid valve SV170, SV171 (See Ch2.3.25) and/or vacuum pump LP172, LP173 (See Ch2.3.24)