T- 4.0.1 Pin More Than 1.0 Volts Dc/Isolate Power Logic Board; T- 4.0.2 Isolate The Sensor Board - Fresenius Medical Care 2008K2 Troubleshooting Manual

T- 4.0.1 PIN 6 MORE THAN 1.0 VOLTS DC / ISOLATE POWER LOGIC BOARD
To prevent damage, turn the machine OFF!
a)
b) Swap in a known good* Power Logic Board.
* Known good = tested in another machine that does not allow temperature to exceed 39°.0 C!
Set your volt meter to measure AC voltage (~ V, V
c)
d) Turn the machine on and return to Dialysis Program ("Select Program" → 'Dialysis' → 'CONFIRM')!
e) Figure right, measure at the distribution board's
Heater Connector, between the BLUE and BROWN
wires. TWO (2) possible scenarios:
1) IF (and ONLY if) more than 100.0 volts AC:
See procedure number
2) IF less than 10.0 volts AC: Problem solved! The
previous Power Logic Board is bad.

T- 4.0.2 ISOLATE THE SENSOR BOARD

NOTE: The previous Power Logic Board is probably good!
To prevent damage, turn the machine OFF!
a)
b) Swap in a known good Sensor Board.
c) Enter Service Mode → Options → Hardware Options.
d) Set T and C Mode to "Yes" and press 'CONFIRM' (the 'X' turns blue)
e) Turn the machine OFF!
Turn the machine on and return to Dialysis Program ("Select Program" → 'Dialysis' → 'CONFIRM')!
f)
g) From the Home screen, ENSURING [Temperature] is less than 40,0° C, again measure BETWEEN the
Heater Connector's BLUE and BROWN wires. TWO (2) possible scenarios:
1) IF (and ONLY if) more than 100.0 volts AC: See procedure number
NOTE: The previous Sensor Board is probably good.
2) IF less than 10.0 volts AC: Problem solved! The previous Sensor Board is bad. Perform parts A
through C below:
A) Return to Service Mode → Options → Hardware Options.
B) Set T and C mode to "No".
C) Perform ALL calibrations.
T- 4.0.2 (page 290).
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
).
AC
T- 4.0.4 (page 291).
Page 290