Fresenius Medical Care 2008K Troubleshooting Manual page 113

Yes See procedure number
No The Heater Switch is bad ('open').
T- 2.7.2 CHECK HEATER VOLTAGE
a) Return to Dialysis program (remember to press the
'CONFIRM' key).
b) Referring to the Figure (right), measure AC voltage (~ V), at
the distribution board's heater connector, between the: Old
heater: BROWN and BLUE wires; New heater: BLACK and
WHITE wires.
c) Greater than 90 volts AC?
Yes All temperature systems are checking okay:
a) Return NTC #2 to distribution position "CON-NTC" (
b) If the problem reoccurs, return to procedure number
No Replace the power control board (inside power supply).
T- 3.0.0 CHECK TEMPERATURE DISPLAY RESPONSE
This procedure allows the heater to cool to check the test board:
a) Referring to the Figure (right), turn the HEATER switch off
(i.e. rocker switch pressed in towards "0" or "OFF").
b) From the Heat Disinfect screen, watch Temperature closely.
IMPORTANT! Allow up to 20 minutes. Does it drop to 35° C
or lower?
Yes Leaving the HEATER Switch off, see procedure
number T- 3.0.2
No Leave the HEATER switch off see procedure number
T- 3.0.1 ISOLATE THE TEST BOARD
a) Turn the machine off.
b) Swap in a known good test board (see
c) Return to Heat Disinfect program and allow 20 minutes. Does Temperature drop to 35° C or lower?
Yes The previous test board was bad.
No a) The previous test board is okay.
b) A problem is indicated with the Temperature display. Turn the HEATER switch ON then
see procedure number
T- 3.0.2 CHECK TEMPERATURE DISPLAY
a) Referring to the Figure (right), place the
), from the four-resistor Temperature set, into NTC #3's
distribution board position "MON-NTC" (2
b) From the Heat disinfect screen, does Temperature read between 78
o
and 82 C?
Yes See procedure number
No a) ASSURE the
T- 3.0.2.
T- 2.7.2 (page 111).
(page 111).
Figure 4A
T- 7.0.0 (page 121).
o
80 C
resistor plug (1.255
nd
position from the left).
T- 3.0.3 (page 112).
80°C
plug (1.255 K ) is placed properly. If not, repeat procedure number
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
st
1
position from left).
T- 1.0.0
T- 3.0.1 (page 111).
AND NOTE C, page 8).
Section 4 – Temperature Problems
(page 93) and be careful.
Page 111