[Temperature] Less Than 35.1 C/Isolate Heater Control; Heater Staying Off - Fresenius Medical Care 2008T Troubleshooting Manual

T- 1.0.142 [TEMPERATURE] LESS THAN 35.1° C / ISOLATE HEATER CONTROL
Turn the Heater Switch OFF!
a)
Set your CALIBRATED volt meter to AC volts (~ V, V
b)
c) Allow NINETY (90) SECONDS BEFORE continuing to part d!
d) Figure right, TIGHTLY HOLD the meter leads
BETWEEN the Heater Connector's BROWN and BLUE
wires.
e) Watching the meter,
f) If EVEN JUST ONCE more than 100.0 volts is seen the
heater is on! TWO (2) possible scenarios:
1)
IF (and ONLY if) ALWAYS LESS THAN 100.0 volts AC:
See procedure number
2)
IF EVER MORE THAN 100.0 volts AC:
TEMP CAL (right column). More than one hundred and twenty (120)?
Yes TEMP CAL more than 120! See Proceed to
No TEMP CAL less than 120! Proceed to
T- 1.0.144 HEATER STAYING OFF
a) Figure right, inside the distribution board, UNPLUG the
connector from the left. This is NTC #2 and unplugging it
should turn the heater on full time!
b) Measure again BETWEEN the Heater
Connector's BROWN and BLUE wires! TWO (2)
possible scenarios:
1)
IF (and ONLY if) more than 100.0 volts
Turn the Heater Switch OFF
AC:
then see procedure number
(page 246
2) IF ALWAYS less than 100.0 volts AC: Leaving
NTC #2 unplugged till instructed, proceed to
281
, procedure number
turn the Heater Switch on!
T- 1.0.144 (page 245).
T- 1.0.146
T- 2.0.0.
2008T Troubleshooting Guide
P/N 490292 Rev. A
)!
AC
Call debug screen 4 to see
page 247
, procedure number
page 320
, procedure number
st
1
page
The heater is staying off!
T- 1.0.155.
T- 7.0.0.
Page 245