2008T Troubleshooting Guide
P/N 490292 Rev. A
SECTION 6 – CONCENTRATE PUMP ERRORS
The CONC (Acid) and Bic (Bicarbonate) pumps each have optical End Of Stroke (EOS) sensors that
monitors the pump pistons when transported back and forth by their stepper motors. From debug screen 0,
per the Figure below, if all systems are okay, the ‘Actual’ number of steps (AAcid, ABic) REMAIN within
three (3) of the ‘Required’ number of steps (Acid, Bic). If not the pump symbol may turn pink.
EOS- 1.0.0 DETERMINE THE EOS ERROR
A) Per Figure 63 (page 442), ENSURE the pumps are installed with their output (red or blue) nozzles
towards the top and the cables extend from the side. If not, this may be the problem!
B) BEFORE continuing to part C, NOTE this page number then perform INITIAL CHECKS (page 77).
C) If the problem was occurring in a Cleaning Program (Heat Disinfect, Rinse, etc.) return to it. If the
problem was occurring in Dialysis Program: 1) Return to Dialysis Program (“Select Program” →
‘Dialysis’ → ‘Enter’); 2) From the Home screen, set [Dialysate Flow] to 800 ml/min and press ‘Enter’!
D) Call debug screen 0. If debug does not appear press ‘Esc’ then call screen 0.
E) Allow thirty (30) seconds THEN, WITHOUT LOOKING AWAY, watch the pump symbols for up to two
(2) minutes OR until if one turns pink! FOUR (4) possible scenarios 1) or 2) or 3) or 4) below:
1) IF the CONC (acid) symbol is EVER pink (solid or blinking) AND the BIC symbol
is ALWAYS white: ACID pump system problem! See procedure number EOS- 2.0.0 (page 442).
2) IF the CONC (acid) symbol is ALWAYS white AND the BIC symbol is EVER pink
(solid or blinking): BIC pump system problem!. Proceed to page 443, procedure number
EOS- 3.0.0.
3) IF BOTH the CONC (acid) AND the BIC symbols are EVER pink (solid or blinking):
Proceed to page 446, procedure number EOS- 5.0.0.
4) IF BOTH pump symbols are ALWAYS white (i.e. NEVER pink): See parts a AND b below:
a) WITHOUT LOOKING AWAY, watch AAcid versus Acid for up to five (5) minutes. If AAcid
REMAINS within three (3) of Acid the Acid Pump System is okay. In this event continue to part
b. If AAcid does NOT remain within three (3) of Acid then TWO (2) possible bad components:
1) Bad ACID pump OR; 2) Bad Actuator-Test Board.
b) Watch ABic versus Bic for up to five (5) minutes. NOTE: If a disposable bibag is attached it is
normal for Bic AND ABic to change slightly but should remain within three (3) of each other. If
ABic REMAINS within three (3) of Bic the Bicarb Pump System is okay! If ABic does NOT
remaining within three (3) of Bic then TWO (2) possible bad components: 1) Bad BICARB pump
OR; 2) Bad Actuator-Test Board.
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