Fresenius Medical Care 2008K Troubleshooting Manual page 157

CO- 10.3.0 CHECK OLC TEMPERATURE STABILITY
Call debug screen 5. CAREFULLY watch TPOS (Temperature post-dialyzer) for one minute. Note the
highest and lowest values seen. Is highest minus lowest (highest - lowest) = 0 or 1?
Yes See procedure number CO- 10.3.1 (page 155).
No See procedure number
CO- 10.3.1 CHECK OLC CONDUCTIVITY STABILITY
From debug screen 5, CAREFULLY watch CPOS (Conductivity post-dialyzer) for one minute. Note the
highest and lowest value seen. Is highest minus lowest (highest - lowest) = less than 8?
Yes See procedure number
No See procedure number
CO- 10.3.2 CHECK FOR MOTOR NOISE
Call debug screen 3. Is !ECH AND/OR !ACK greater than 3?
Yes Turn the blood pump off then turn the machine off, back on and place it into Dialysis Program.
Check !ECH and !ACK again. If remaining less than 3 replace the blood pump motor. If
continuing to increase check the deaeration and flow motors for excessive carbon build up
and/or bad brushes.
No See procedure number
CO- 10.4.0 CHECK MOTOR NOISE / CHECK POSITIVE (+) 12 VOLT DC SUPPLY
a) Open the card cage. Place a volt meter's black lead on chassis ground (see
b) Referring to Figure 60
requires the '+12 to -12 Volt Converter Board'. This miniature circuit board uses the motherboard's
TEST connector. If equipped with the new style power logic board (released 2008) the 'Converter'
board is NOT required and should NOT be present (i.e. the TEST connector is empty).
c) Proceed accordingly to measure for +12 volts DC (see Figure right):
Old style power logic board: Measure at the solder (rear)
side of the 'Converter Board' at pin 5 (five pins from the left)
then see part d.
New style power logic board: Measure directly at the empty
TEST connector at pin 5 (five pins from the left) then see part d.
d) Between +11.7 and +12.3 volts DC AND stable (i.e. does not vary more
than +/- 0/1)?
Yes See procedure number
No Replace with a new style power logic board (assure
the 'Convertor' board is NOT present) OR with an
old style power logic board AND a 'Convertor' board
1, 2
1
CAUTION! To avoid damage, the 'Convertor' board MUST be
installed with the 'solder side' towards the front of the machine
AND matched exactly pin for pin to the TEST connector.
2
If a +12 volt problem still exists after replacement proceed to page Error! Bookmark not defined.,
SECTION 24 – TROUBLESHOOTING POWER
CO- 10.4.0 (page 155).
CO- 10.5.0 (page 156).
CO- 10.3.2 (page 155).
CO- 10.4.0 (page 155).
(page 147), if the machine is equipped with old style power logic board it
CO- 10.4.1
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Section 5 – Conductivity/ On Line Clearance Problems
(page 156).
DISTRIBUTION.
Figure 1, page 3).\
Page 155