Over- 7.0.0 Isolate Valve #41; Over- 7.0.1 Isolate Float Switch - Fresenius Medical Care 2008K2 Troubleshooting Manual

OVER- 7.0.0 ISOLATE VALVE #41

Figure right, unplug valve #41 from distribution board
position #27 ("V27, "IN-V"). TWO (2) possible scenarios:
1)
IF massive overflow STOPS: See procedure
number OVER- 7.0.1
2) IF massive overflow does NOT stop: ENSURING
Valve #41 was unplugged, perform parts AND b
below:
a) Turn the water OFF! Referring
distribution board to ENSURE it terminates at valve #41's solenoid terminals.
b) If the harness terminates at valve #41, valve #41 is bad (to LOCATE refer to

OVER- 7.0.1 ISOLATE FLOAT SWITCH

a) With the machine AND water ON, CAREFULLY return valve #41 to distribution board position "IN-V". If
(and ONLY if) 'massive' overflow continues see part b.
b) Figure right, unplug the float's connector from distribution
board position "X5, FLOAT-SW". Does 'massive' overflow
continue?
Yes Overflow continues! ENSURING the float was
unplugged, the Actuator-Test Board is bad (see
Figure 4A, page 9).
No a) Trace the float's wiring harness from the distribution board to ENSURE it terminates at the
float. NOTE: To LOCATE the Float refer to
b) If the harness terminates correctly replace the float.
c) With the machine AND water ON, if (and ONLY if) massive overflow continues see part d.
IMPORTANT!
d)
electrocution then see part e.
e) Figure right, remove the heater and check its port
into the top of the Hydrochamber for heat damage
(i.e. melting). If (and ONLY if) damage is located it is
necessary to replace the Hydrochamber. If (and
ONLY if) heat damage is NOT located see part e.
e) Reinstall the heater.
f) With the machine AND water ON, if (and ONLY if)
massive overflow continues see part g
g) FOUR possible bad components: 1) Bad actuator cable OR; 2) Bad Sensor Board cable OR;
3) Bad distribution board OR; 4) Bad motherboard.
(page 550).
Figure 35A (page 193), trace valve #41's wiring harness from the
Turn the machine OFF to prevent
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
Figure 28 (page 129).
Figure 35 (page 193)).
Page 550