Isolate The Acid/Bic Pump(S); Acid And Bic Pumps View - Fresenius Medical Care 2008T Troubleshooting Manual

CO- 4.9.0 ISOLATE THE ACID / BIC PUMP(S)
a) Per the Figure below, ENSURE no tubing restriction at the Acid and /or Bicarb pump.
b) At the suspect pump(s), Per the Figure (right), TWO checks:
Check #1: The metal plate has arrows to identify the Input (←) and
Output (→) ports. ENSURE the colored nozzle is at the
Output port AND is towards the TOP of the machine
Check #2: ENSURE the Input (clear) and Output (solid) tubing is
connected to the appropriate nozzles per check #1.
c) Per the Figures (right), disassemble the suspect pump(s). SIX (6)
more checks:
Check #3: ENSURE the seals are oriented correctly.
Check #4: Check for debris and for broken or bent springs.
Check #5: ENSURE BOTH springs are 'weak' type.
Check #6: Compare BOTH springs to new and replace one that
appears shorter than a new one.
Check #7: Check or replace the seals and O-rings.
Check #8: Check for a torn diaphragm.
f) If a problem was not located above, TWO (2) possible bad
components: 1) Bad Acid or Bicarb Pump OR; 2) Bad
Actuator-Test Board.
Figure 60 – Acid and Bic Pumps
2008T Troubleshooting Guide
P/N 490292 Rev. A
Page 379