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HPS-III-Heißkanalsystem_Störungshilfe_BA_V-2-0_EN
Possible malfunctions
6.5 Possible malfunctions
6.5.1 Troubleshooting
Error
Possible cause / measure
Temperature of control zone exceeds
set temperature
Check if the thermocouple and power connections are allocated correctly
(heat up each zone separately).
Controller indicates broken thermocoup-
le. No temperature value is displayed
Check thermocouple at the nozzle and/or thermocouple cable and controller
respectively.
Thermocouple indicates a temperature
value too low
Jammed thermocouple (temperature at the position in the mould where it is
jammed is displayed, normally between mould and room temperature)
Thermocouple indicates wrong tempera-
ture value
Wrong type of thermocouple allocated in the controller
Thermocouple indicates value zero
Thermocouple reverse-poled, check thermocouple circuit
Burns on part in one cavity within a
multi-cavity mould
Check nozzle (check and compare voltage values of all nozzles at a given
current).
Short decrease or increase in tempera-
ture (temperature fluctuations)
•
Power or thermo cables do not have proper contact.
•
Humidity in the heater
Nozzle does not heat up properly
•
Check assembly geometry of the hot runner
•
Check resistance of the concerned heating zone and the thermocouple
Nozzles are drooling
•
Temperature of nozzles too high
•
Increase the machine nozzle bore to 8 - 10 mm or increase decompression.
•
Gating point too large
Hot runner leakage
•
No sufficient preload
•
Fits used for sealing of the system are not OK
Chart 11: Errors/Measures
