T- 7.2.2 [Temp Dac] Between 120 And 140/Verify Flow; T- 7.2.4 ‘Bob' Down Longer Than Four Seconds/Isolate Internal Alarm Limit; T- 7.2.5 ‘Bob' Was Not Rising But Is Now/Isolate Possible High Temperature - Fresenius Medical Care 2008K2 Troubleshooting Manual

T- 7.2.2 [TEMP DAC] BETWEEN 120 AND 140 / VERIFY FLOW
The external flow indicator's 'bob' is watched to see if it EVER, even once, stays down longer than four (4)
seconds AND the external meter is watched to see if it EVER, even once, exceeds 38.9° C. WITHOUT
LOOKING AWAY watch 'bob' AND the meter for five (5) minutes. TWO (2) possible scenarios:
1) IF (and ONLY if) 'bob' NEVER stays down longer than four (4) seconds: Proceed to
procedure number
2) IF 'bob', even once, stays down longer than four (4) seconds: See procedure number
(page 306).
T- 7.2.4 'BOB' DOWN LONGER THAN FOUR SECONDS / ISOLATE INTERNAL ALARM LIMIT
a) Figure right, remove the connector from the
board position from the left, "MON-NTC". This is temperature
sensor NTC #3.
b) The screen's [Monitor Reference] window should be less
than 30°C if NTC #3 was unplugged!
c) Does 'bob' start to move up and down?
Yes 'Bob' moving! Leaving NTC #3 unplugged, see procedure number
No 'Bob' not moving! A) Return NTC #3's connector to 2
B) There is an unannounced "No Water" OR Flow Error present; C) Turn the machine off;
D) Turn the machine back on and return to Dialysis Program ("Select Program" → 'Dialysis' →
'CONFIRM') to troubleshoot these problems!
T- 7.2.5 'BOB' WAS NOT RISING BUT IS NOW / ISOLATE POSSIBLE HIGH TEMPERATURE
TO PREVENT DAMAGE, WITHOUT LOOKING AWAY, watch the external meter for six (6) minutes or until
if it, even if only once, exceeds 38.9° C! TWO (2) possible scenarios:
1) IF (and ONLY if) the meter NEVER reaches 38.9° C: See procedure number
2) IF the meter DOES reach 38.9° C at least ONCE: See parts a THROUGH d below:
a) Turn the machine OFF!
b) RETURN NTC #3's connector to the
NTC".
c) Using a temperature meter measure incoming (RO) water temperature. If (and ONLY if) less than
37.0º C see part d. If more than 37.0° C incoming water is too high and this may be the problem!
d) Return to Dialysis Program ("Select Program" → 'Dialysis' → 'CONFIRM')!
page 241
e) Proceed to
T- 7.4.0.
2
nd
2
, procedure number
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
nd
distribution
nd
position from the left, "MON-NTC";
distribution board position from the left, "MON-
T- 1.3.40.
page 308
T- 7.2.4
T- 7.2.5 (page 306).
T- 7.2.6 (page 307).
Page 306
,