T- 6.9.1 Unstable Temperature Checks - Fresenius Medical Care 2008K2 Troubleshooting Manual

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 or burning 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' → 'CONFIRM')!
b) With [Dialysate Flow] set to where the instability is (or was) occurring 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 and! Watch for thirty (30) 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: One at a time swap in the listed components (see
Component List below) then, in between, repeat procedure number
new component.
Component List: 1) Power Logic Board
Sensor board must calibrate Temp Sensor AND Temp Control; 5) Float switch
supply components: i) Power Control board; ii) Heater Triac
a
To LOCATE refer to
LOCATE refer to
T- 6.9.1 (page 301).
page 302
, procedure number
Figure 4A (page 9);
Figure 51 (page 291)
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
T- 7.0.0.
a
; 2) NTC #2; 3) Heater; 4) Sensor Board (with a new
c
.
b
To LOCATE refer to
T- 6.9.1 (page 301) to test each
b
; 6) TWO (2) power
c
Figure 28 (page 129); To
Page 301