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uPrint/uPrint SE Service Manual 6-23
Temperature Failed to Regulate Minor Errors (18.XX)
48.
Code Description Corrective Actions
18,01 Temperature not chang-
ing fast enough.
Chamber is slow to heat
up.
1. Status-Details: Check to see if current envelope temperature is above
72C before starting a model.
2. Status--Details: Check to see if envelope temperature set point is 77C. If
not, toggle power switch.
3. Check heaters, chamber fans, and heater cables.
4. Check chamber thermocouple - see 14.40.
5. Check AC input. Verify that no extension cords or power strips are
attached to the system.
6. Check AC output from PDB to chamber heaters. Check AC cables.
Replace PDB.
Liquefier won’t heat up (its
cold).
Use CatalystEX to check to
see if the temp is going
over 90C. If temp is above
90C go to next section
1. Liquefier T/C may be crushed. Test using meter. If crushed, reading will
be 0 Ohms between pin 1 and ground.
2. If head board with LED’s is present, check model and support 120VDC
LEDs at head board.
•
If both model (upper) and support (lower) LEDs are illuminated,
head heater is bad. Replace head.
• If only the model LED (lower) is illuminated, replace the 120VDC
power supply
• If only the support LED (upper) is illuminated, replace the power
distribution board
3. If head board with LED’s is not present, use volt meter to check for 120
VDC at head board.
•
If 120VDC present at both model and support side, heater is bad.
Replace head.
• If no 120VDC at support side, replace 120VDC power supply.
• If no 120VDC at model side, replace power distribution board.
4. The umbilical cable to the heater is broken or has a bad connector.
5. Check AC input. Verify that no extension cords or power strips are
attached to the system.
6. Check that DL18 on the PDB is lit. If not 120VDC circuit maybe bad -
replace PDB.
7. Monitor DL23 (M) and DL24 (S). LED's should turn on when head is
commanded to heat. If not lit - check 120VDC, if absent replace PDB
(model) or 120VDC AUX (support).
8. Check the thermocouple and heater connectors.
Liquefier is warm but
doesn't reach operating
temperature.
1. Check AC input. Verify that no extension cords or power strips are
attached to the system.
2. Liquefier heater has higher than normal resistance, correct value should
be 175 to 216 ohms. If incorrect replace head.
3. The umbilical cable has an intermittent connection. Replace Umbilical
Cable.
4. Replace the Head Board.
5. Check 120VDC, if low, replace PDB (model) or 120VDC AUX (support).
Chamber temperature too
high (over 77 degrees)
1. Chamber T/C has failed.
2. Chamber temperature offset is incorrect. Correctly set at 77 degrees
using MaracaEX See “Temperatures” on page 3-10.
18,02 Temperature failed to regu-
late within 7 degrees.
1. Status--Details: Check to see if head temperature set point is 310C for
model and 300C for support.
2. Check Liquefier Thermocouple wire and/or Heater wires.
3. Check for torn or damaged insulation on the liquefier, especially at the
tip.
4. Check head T/C and umbilical cable for a loose connection. Replace
umbilical cable.
18,03 Incorrect model head tem-
perature.
1. Using MaracaEX, set model temperature to default of 310C.
2. See also 18,01.