Fresenius Medical Care 2008K2 Troubleshooting Manual page 342

IMPORTANT! Place the machine into RINSE!
c)
d) Is the external flow indicator's 'bob' rising at least ¼ way up in the sight tube?
Yes 'Bob' moving! Proceed to
No 'Bob' NOT moving! See parts a AND b below:
a) Return to Dialysis Program ("Select Program" → 'Dialysis' → 'CONFIRM')!
b) Proceed to
PROGRAM.
2008K/K2 Troubleshooting Guide
page 353
page 20
, SECTION 1 – FLOW ERRORS IN DIALYSIS
P/N 507298 Rev. H
, procedure number CO- 6.0.0.
Page 338