Fresenius Medical Care 2008K Troubleshooting Manual page 236

Yes See procedure number
No a) Remove all clamps.
NOTE
b)
234).
AUTOTEST- 3.0.1 ISOLATE THE HEAT EXCHANGER
Remove the heat exchanger's clamps and repeat the Leak Test twice on Valve #29. Does it pass both times?
Yes See procedure number
No The heat exchanger's internal plate (P/N 650775) may be leaking.
AUTOTEST- 3.0.2 ISOLATE VALVE #29
Remove valve #29's clamps and repeat the Leak Test twice on Valve #29. Does it pass both times?
Yes A leak is not indicated! Repeat the Leak Test on Valve #29 once more to verify.
NOTE
No that valve #29 is leaking then see procedure number
AUTOTEST- 5.0.0 CHECK FOR A SHORTED ACTUATOR BOARD VALVE DRIVER
Two possibilities: 1) Bad actuator board; 2) Bad valve (mechanically leaking).
a) If (and ONLY if) the "IOS" Leak Test was not performed previously do so now. If (and ONLY if) IOS fails
two of three times see procedure number
passed) continue with part b.
b) Turn the power off and swap in a known good actuator board (see
c) If the NOTED leaking valve was (two scenarios):
AUTOTEST- 3.0.1
that Valve #30 is leaking then see procedure number
Figure 96 – Drain Circuit Checks
AUTOTEST- 3.0.2
AUTOTEST- 1.0.0
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Section 18A – Automated Valve Leak Tests
(page 234).
(page 234).
AUTOTEST- 5.0.0
(page 231). If IOS was performed (and
Figure 4A, page 8).
AUTOTEST- 5.0.0 (page
(page 234).
Page 234