More Than 100.0 Volts Ac/Isolate Ntc #2; Temp Cal More Than 120 - Fresenius Medical Care 2008T Troubleshooting Manual

T- 1.0.146 MORE THAN 100.0 VOLTS AC / ISOLATE NTC #2
a) Using a flashlight, check inside NTC #2's distribution
board position, if corrosion or damage is located this
may be the problem!
b) Return NTC #2's connector to the
position from the left, "CON-NTC".
c) Call debug screen 4 to see TEMP CAL (right
column). More than one hundred and twenty
(120)?
Yes TEMP CAL more than 120! See procedure number
No TEMP CAL less than 120! Proceed to
T- 1.0.147 TEMP CAL MORE THAN 120
a) Call the Home screen. If not already, allow
[Temperature] to fall to below 35.0º C.
b) Figure right, at the Heater Connector, HOLD the
meter leads between the BROWN and BLUE wires.
c) While watching the meter for ten (10) seconds,
the Heater Switch on!
scenarios:
1)
IF (and ONLY if) always less than 10.0 volts AC (V
THEN proceed to
* To LOCATE NTC #2 refer to
2)
IF EVER more than 100.0 volts AC (V
Scenario #1:
Scenario #2: IF [Temperature] does DOES NOT increase to 35.1º C OR more: See
st
1
distribution board
TWO (2) possible
page 320
, procedure number
Figure
IF (and ONLY if) [Temperature] increases to 35.1º C OR more: Problem
solved! NTC #2 may not have been connected properly.
procedure number T- 1.0.155
2008T Troubleshooting Guide
P/N 490292 Rev. A
T- 1.0.147
page 320
, procedure number
turn
): Replace NTC #2* with a known good
AC
T- 7.0.0.
42, (page 236)
): Allow five (5) minutes! TWO (2) possible scenarios:
AC
(page 247).
(page 246).
T- 7.0.0.
Page 246