Fresenius Medical Care 2008T Troubleshooting Manual page 323

c) Figure below, one at a time, remove NTC #2 and NTC #3 from their
hydraulic locations and check their 'probe ends' (Figure right). If corrosion is
located replace the NTC.
d) Has procedure number T- 7.0.0 been performed in THIS troubleshooting
session?
Yes See procedure number
No Proceed to
T- 6.9.1 UNSTABLE TEMPERATURE CHECKS
a) Return to Dialysis Program ("Select Program" → 'Dialysis' → 'Enter')!
b) Call debug screen 0 to watch Flow Error AND for a "No Water" alarm. A "No Water" alarm must
NEVER occur and Flow Error must NEVER = 1. Watch for fifteen (15) minutes!
c) Based on temperature stability, TWO (2) possible scenarios:
1) IF (and ONLY if) Temperature is NEVER unstable: The Troubleshooting Guide cannot locate a
problem at this time!
2) IF Temperature is or becomes unstable: With the machine turned off, one at a time swap in the
listed components (see Component List below) with known good then, in between, repeat
procedure number
Component List: 1) Power Logic Board
Sensor board you must calibrate Temp Sensor AND Temp Control); 5) TWO (2) power supply
components: i) Power Control board; ii) Heater Triac .
a
To LOCATE the board refer to
b
To LOCATE refer to
c
To LOCATE the Heater Triac REFER to the Figure at the bottom of page 312
T- 6.9.1 (page 319).
page 320
, procedure number
T- 6.9.1 (page 319) to test each new component.
Figure 4A
Figure 28 (page 140);
2008T Troubleshooting Guide
P/N 490292 Rev. A
T- 7.0.0.
a
; 2) NTC #2; 3) Heater
(page 10)
b
; 4) Sensor Board (with a new
Page 319