2008T Troubleshooting Guide
P/N 490292 Rev. A
T- 1.4.0 [TEMPERATURE] NOT LESS THAN 30º C / ISOLATE DEBUG TEMP
With NTC #3 REMAINING unplugged, call debug screen 4. Is TEMP (lower left) less than
0.3?
Yes TEMP less than 0.3! See procedure number T- 1.4.1 (page 262).
No TEMP more than 0.3! Read before performing: A) Turn the machine off; B) Swap in the listed
components (see COMPONENT LIST below) one at a time, with known good, then in between;
C) Return to Dialysis Program and repeat procedure number T- 1.4.0 (page 262) until screen 4’s
TEMP is less than 0.3 indicating the last component swapped in is the problem.
COMPONENT LIST: 1) Actuator-Test Board
1
; 2) Sensor Board
1, 2
; 3) Sensor Board cable;
4) Functional Board (possibly IC20)
1,2
; 6) Distribution board; 7) Motherboard
1
.
1
To LOCATE these boards refer to Figure 4A (page 10)
2
To prevent “Cond Offset Failure” place the machine into T and C Mode (refer to OPERATING
MODES (page 19))
T- 1.4.1 CHECK ‘TEMP COMP’ OPTION
Enter Service Mode → Options → Hardware Options. Does the “Yes” box
next to ‘Temp Comp’ have an ‘X’ in it (Yes or No)?
Yes Place the ‘X’ in the “No” box and press ‘Enter’. The ‘X’ turns blue.
Post a note that ‘Temp Comp’ is off then see procedure number
T- 1.4.2 (page 262).
No Temp Comp = No! See procedure number T- 1.4.2 (page 262).
T- 1.4.2 TEMP COMP = NO / ATTEMPT TO SET TEMP LOW RANGE / TEMP CONTROL
NOTE! This procedure is NOT a calibration! There is NO NEED to install a meter yet! DO NOT
touch the screen’s [Temp DAC] data box!
a) With NTC #3 remaining unplugged, select Calibrate Sensors → Temp Control.
b) Press and release ‘Enter’ until the screen’s [Monitor Reference] box turns pale yellow / white.
c) Press [Monitor Reference], it turns bright yellow.
d) Adjust [Monitor Reference] to as low as it will go then increase it 0.2° C ABOVE that.
e) Press and release the ‘Enter’ key until the calibration is saved.
f) Turn the machine OFF!
g) Turn the machine on and return to Dialysis Program (“Select Program” → ‘Dialysis’ → ‘Enter’)!
h) With NTC #3 remaining unplugged, call the Home screen. Is [Temperature] less than 30.0° C now?
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