Fresenius Medical Care 2008T Troubleshooting Manual page 464

b) Figure below, remove the UF Pump's output (TOP) tubing from the location shown!
c) Looking at the UF Pump's vacant OUTPUT nozzle, TWO (2) possible scenarios:
1) IF (and ONLY if) no fluid from the UF Pump: Reattach the tubing then see procedure number
FIL- 2.0.2 (page 461).
2) IF you see fluid output from the UF Pump: See parts a AND b below:
a) Call debug screen 0.
b) Per the Figure below, WITHOUT LOOKING AWAY, watch the UF Pump's 'dot' for ONE (1)
minute. Does it EVER BLINK between white and blue?
Yes
No The UF 'dot' DOES NOT blink! Fluid from the UF Pump indicates bad or incorrectly
installed internal seals/springs OR the pump is upside down!
The UF 'dot' blinks! The Actuator-Test Board may be bad!
2008T Troubleshooting Guide
P/N 490292 Rev. A
Page 460