Fresenius Medical Care 2008K2, Руководство по устранению неисправностей

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2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
Page 315
T- 8.0.0 ISOLATE NTC #2
This procedure checks NTC #2
resistance (Ω) response. An accurate thermometer is required.
If one is not
available replace NTC #2 (see Figure 54 , page 315) with a known good then return to (ABOVE) procedure
number T- 7.2.1 (page 305).
a)
IMPORTANT! Turn the machine OFF!
b) Per the Figure below, unplug NTC #2’s connector from the
1
st
position from the left, labeled “CON-NTC”.
Figure 54 – Hydraulics Rear View – NTC #2
c) CAREFULLY ( thin wires! ) open NTC #2’s female distribution board connector.
d) Referring to the Figure above, remove NTC #2 from the hydrochamber to expose its ‘probe end’. Do
NOT lose the O-ring!
e) If (and ONLY if) NTC #2 appears ‘rusty’ replace it then return to (ABOVE)
procedure number T- 7.2.1 (page 305). If NOT rusty continue to part f.
f) Clean with paper towel. Do not touch it from this point forward to avoid
fouling it!
g) Fill a Styrofoam cup with water, accurately measured, between 36 and 38 o C!
h) Per the Figure (right), drop NTC #2’s ’probe end’ into the cup.
i) Per the Figure right, measure RESISTANCE (
Ω) between the
connector’s green and white wires. Referring to Table 6 (page 316),
between the minimum and maximum (
KΩ
) range?
Yes Return to (ABOVE) procedure number T- 7.2.1 (page
305).
No Replace NTC #2 with a tested known good then return to
(ABOVE) procedure number T- 7.2.1 (page 305).