Isolate Valve #43 Possobly Sticking Closed - Fresenius Medical Care 2008T Troubleshooting Manual

CLEAN- 4.6.33 ISOLATE VALVE #43 POSSIBLY STICKING CLOSED
PDIA is NEVER 6.0 or AND NEVER 0.0 longer than seven (7) seconds!
a) Call debug screen 0 (Figure right).
b) Allow Valve #43's 'dot' to turn blue then white
again.
c) As seen earlier, ENSURE the external Flow
Indicator's 'bob' is rising at least ¼ way up in
the sight tube!
d) Per the Figure below, unplug the Flow Pump from Distribution Board position "P21-Flow-P".
ENSURE the FLOW MOTOR shaft stops rotating!
e)
f) Every forty five (45) seconds Valve #43's 'dot' turns blue for sixteen (16) seconds. WHILE IT IS BLUE,
does the external flow indicator's 'bob' rise at least ¼ way up in the sight tube?
Yes 'Bob' moving! Valve #43 is okay! A) Return the Flow Pump's connector to distribution
board position" P21- Flow-P"; B) ENSURE the Flow Motor rotates; C) If "Flow Recirc
Error 1" continues to occur you may have made an error somewhere!
No 'Bob' NOT moving! ENSURING Loading Pressure (gauge in the rinse port) remains good,
TWO (2) possible bad components: 1) Bad Actuator-Test Board OR 2) Bad Valve #43
(sticking closed).
NOTE! When troubleshooting is complete be sure to return the Flow Pump's connector to
distribution board; position" P21- Flow-P";
2008T Troubleshooting Guide
P/N 490292 Rev. A
Page 201